新增：首页问候语真实化 + 刻意保留的 demo 占位显式登记（T3.5-10，ADR-022）

- 「下午好，豆豆」改真实展示名（`nickname ?? username`，与资料页共用同一个
  ProfileController：一次 /me 供两个消费点，改昵称后两处一起变）。资料未到手
  时退化为不称名的「下午好 👋」，不编造假名。
- 按 ADR-022 决策 D3.5-1 钉死范围，**其余首页 demo 一律不动**，并在代码里逐项
  标注为「刻意保留的 demo 占位」：天气/位置（需接外部服务）、圈子=话题
  （ADR-018 剪出）、促销卡（M5 服务域）、搜索与本地服务段。
  widget 测试同时钉住「保留项仍在」，避免后续以「顺手清理」越出拍板范围。
- 新增 compose 真链路桌面实测脚本 `integration_test/profile_avatar_live_test.dart`
  （默认跳过，`PATBOND_PROFILE_LIVE=1 ... -d linux` 开启）：UI 注册 → 登录 →
  资料真实化 → 设昵称 → 传用户头像 → Feed 作者名同步 → 宠物头像，逐步截图。
  只有选图与压缩两层是桌面替身，createUpload / 预签名 PUT / confirm / PATCH
  全为生产实现。两处实测坑写进注释：Feed 作者名有服务端 60s 缓存滞后；
  1×1 的极小图能上传能下载但 Flutter 解码器拒绝，会被误判成「没传上」。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

integration_test/client_ux_live_test.dart

@@ -0,0 +1,243 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:ui' show ImageByteFormat;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:patbond_flutter/app/app.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:patbond_flutter/features/pets/pet_detail_page.dart';
+import 'package:patbond_flutter/features/pets/pet_form_page.dart';
+
+/// 内存 token 存储（桌面实测环境无 keyring；不落任何持久化）。
+class _InMemoryTokenStore implements TokenStore {
+  final Map<String, String> _values = {};
+
+  @override
+  Future<String?> read(String key) async => _values[key];
+
+  @override
+  Future<void> write(String key, String value) async => _values[key] = value;
+
+  @override
+  Future<void> delete(String key) async => _values.remove(key);
+}
+
+/// M3.5-01/02/03 compose 真链路桌面实测（默认跳过，不计入常规测试套件）：
+///
+/// ```bash
+/// # 先起后端六容器（patbond-api 仓库根 docker compose up -d --build），再：
+/// PATBOND_UX_LIVE=1 flutter test integration_test/client_ux_live_test.dart -d linux
+/// ```
+///
+/// 驱动**真实 App**（Linux 桌面 GTK 渲染管线 + 真实 HTTP）走用户实测那条路：
+/// 注册 → UI 登录 → 档案页建档 → 打开生日选择器（校验全中文 + 品牌配色 +
+/// 手输可用 + 一键今天）→ 保存进详情页（校验花费卡展示实际月份 + chevron）。
+/// 逐步截图落到 `build/ux-live/`：本机是 Wayland 会话，X11 的
+/// `import -window root` 取不到根窗口，改为把整棵 App 包一层
+/// [RepaintBoundary] 后 `toImage()` 直出真实渲染像素（含 Overlay 里的弹窗）。
+void main() {
+  final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+  binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
+
+  final enabled = Platform.environment['PATBOND_UX_LIVE'] == '1';
+  const authBase = 'http://127.0.0.1:8081';
+  const petBase = 'http://127.0.0.1:8083';
+  final shotDir = Directory('build/ux-live');
+  const rootKey = ValueKey<String>('ux-live-root');
+
+  Future<void> shot(WidgetTester tester, String name) async {
+    final boundary = tester.renderObject<RenderRepaintBoundary>(
+      find.byKey(rootKey),
+    );
+    await tester.runAsync(() async {
+      if (!shotDir.existsSync()) shotDir.createSync(recursive: true);
+      final image = await boundary.toImage(pixelRatio: 1.5);
+      final bytes = await image.toByteData(format: ImageByteFormat.png);
+      final path = '${shotDir.path}/$name.png';
+      File(path).writeAsBytesSync(bytes!.buffer.asUint8List());
+      debugPrint('[shot] $name → $path (${bytes.lengthInBytes} bytes)');
+    });
+  }
+
+  Future<void> pumpUntil(
+    WidgetTester tester,
+    Finder finder, {
+    Duration timeout = const Duration(seconds: 25),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (finder.evaluate().isNotEmpty) return;
+    }
+    fail('等待超时：$finder');
+  }
+
+  Future<void> pumpUntilGone(
+    WidgetTester tester,
+    Finder finder, {
+    Duration timeout = const Duration(seconds: 25),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (finder.evaluate().isEmpty) return;
+    }
+    fail('等待消失超时：$finder');
+  }
+
+  /// 直连服务端下单个 JSON 请求（种子数据走真实 HTTP，不绕 DB）。
+  Future<Map<String, dynamic>> postJson(
+    String url,
+    Map<String, Object?> body, {
+    String? bearer,
+  }) async {
+    final client = HttpClient();
+    final request = await client.postUrl(Uri.parse(url));
+    request.headers.contentType = ContentType.json;
+    if (bearer != null) {
+      request.headers.set(HttpHeaders.authorizationHeader, 'Bearer $bearer');
+    }
+    request.add(utf8.encode(jsonEncode(body)));
+    final response = await request.close();
+    final text = await response.transform(utf8.decoder).join();
+    client.close();
+    expect(response.statusCode, anyOf(200, 201), reason: 'POST $url 失败：$text');
+    final envelope = jsonDecode(text) as Map<String, dynamic>;
+    expect(envelope['code'], 0, reason: 'POST $url 业务码非 0：$text');
+    return envelope['data'] as Map<String, dynamic>;
+  }
+
+  testWidgets('桌面真链路：日期选择器中文/品牌色/手输/今天 + 花费卡实际月份', (tester) async {
+    // ---- 注册一次性账号 + 种子数据（宠物 + 当月一笔就医支出）----
+    final seed = DateTime.now().millisecondsSinceEpoch;
+    final username = 'uxlive$seed';
+    final password = 'Live1234!$seed';
+    await postJson('$authBase/api/v1/auth/register', {
+      'username': username,
+      'phone': '+86137${(seed % 100000000).toString().padLeft(8, '0')}',
+      'password': password,
+    });
+    final tokens = await postJson('$authBase/api/v1/auth/login', {
+      'username': username,
+      'password': password,
+    });
+    final accessToken = tokens['accessToken'] as String;
+    final pet = await postJson('$petBase/api/v1/pets', {
+      'name': '实测豆豆',
+      'species': 'dog',
+      'sex': 'male',
+      'customBreedName': '中华田园犬',
+    }, bearer: accessToken);
+    final petId = pet['id'] as String;
+    // 当月一笔 128.50 元就医支出：花费卡应显示「N 月花费 ¥128.50」——
+    // 用户那次误录（记到 4 月）看到 ¥0 正是因为记录不在当月窗口内。
+    await postJson('$petBase/api/v1/pets/$petId/health-events', {
+      'eventType': 'medical',
+      'occurredAt': DateTime.now().toUtc().toIso8601String(),
+      'title': '皮肤检查',
+      'amountCents': 12850,
+    }, bearer: accessToken);
+
+    // ---- 启动真实 App ----
+    await tester.pumpWidget(
+      RepaintBoundary(
+        key: rootKey,
+        child: App(
+          sessionManager: SessionManager(store: _InMemoryTokenStore()),
+        ),
+      ),
+    );
+    await pumpUntil(tester, find.text('登录'));
+
+    await tester.enterText(find.byType(TextField).at(0), username);
+    await tester.enterText(find.byType(TextField).at(1), password);
+    await tester.tap(find.text('登录'));
+
+    // ---- 档案 Tab → 建档表单 ----
+    await pumpUntil(tester, find.text('档案'));
+    await tester.tap(find.text('档案'));
+    // 列表已有种子宠物 → 走虚线「＋ 添加宠物」卡（空态 CTA 文案不同）。
+    await pumpUntil(tester, find.textContaining('添加宠物'));
+    await tester.tap(find.textContaining('添加宠物').first);
+    await pumpUntil(tester, find.byType(PetFormPage));
+    await shot(tester, '01-pet-form');
+
+    // ---- 生日日期选择器：全中文 + 品牌配色 ----
+    await tester.tap(find.widgetWithText(ListTile, '生日（可选）'));
+    await pumpUntil(tester, find.byType(DatePickerDialog));
+    await tester.pump(const Duration(milliseconds: 600));
+    await shot(tester, '02-date-picker-zh');
+
+    expect(find.text('选择日期'), findsOneWidget, reason: '标题非中文');
+    expect(find.text('确定'), findsOneWidget);
+    expect(find.text('取消'), findsOneWidget);
+    expect(find.text('Select date'), findsNothing);
+    expect(find.text('OK'), findsNothing);
+
+    final inkColors = tester
+        .widgetList<Ink>(find.byType(Ink))
+        .map((ink) => ink.decoration)
+        .whereType<ShapeDecoration>()
+        .map((d) => d.color)
+        .toList();
+    expect(
+      inkColors,
+      contains(AppColors.primaryStrong),
+      reason: '选中日仍是 fromSeed 派生的暗红棕，未取品牌 primaryStrong',
+    );
+
+    // ---- 手输模式：中文标签 + 敲入已知日期 ----
+    await tester.tap(find.byIcon(Icons.edit_outlined));
+    await pumpUntil(tester, find.text('输入日期'));
+    await shot(tester, '03-date-input-zh');
+    final field = find.descendant(
+      of: find.byType(DatePickerDialog),
+      matching: find.byType(TextField),
+    );
+    await tester.enterText(field, '2024/03/15');
+    await tester.pump(const Duration(milliseconds: 300));
+    await tester.tap(find.text('确定'));
+    await pumpUntil(tester, find.text('2024-03-15'));
+    await shot(tester, '04-date-typed');
+
+    // ---- 「今天」快捷键：一键落今天，不开弹窗 ----
+    final todayText =
+        '${DateTime.now().year}-'
+        '${DateTime.now().month.toString().padLeft(2, '0')}-'
+        '${DateTime.now().day.toString().padLeft(2, '0')}';
+    await tester.tap(find.widgetWithText(TextButton, '今天'));
+    await pumpUntil(tester, find.text(todayText));
+    expect(find.byType(DatePickerDialog), findsNothing, reason: '「今天」不该开弹窗');
+    await shot(tester, '05-today-shortcut');
+
+    // ---- 退出建档表单（本单不验建档链路，宠物与支出已由 API 种下）----
+    await tester.tap(find.byIcon(Icons.arrow_back));
+    await pumpUntilGone(tester, find.byType(PetFormPage));
+
+    // ---- 详情页：花费卡展示实际月份 + chevron 可点提示 ----
+    await pumpUntil(tester, find.text('实测豆豆'));
+    await shot(tester, '06-pets-list');
+    await tester.tap(find.text('实测豆豆'));
+    await pumpUntil(tester, find.byType(PetDetailPage));
+    final monthLabel = '${DateTime.now().month} 月花费';
+    await pumpUntil(tester, find.text(monthLabel));
+    await tester.pump(const Duration(milliseconds: 600));
+    await shot(tester, '07-pet-detail-expense-card');
+
+    expect(find.text('本月花费'), findsNothing, reason: '仍是硬编码「本月花费」');
+    // 当月真有支出 → 卡片给出金额（月份口径自证：记录落在当月才计入）。
+    expect(find.text('¥128.50'), findsOneWidget);
+    expect(
+      find.ancestor(
+        of: find.text(monthLabel),
+        matching: find.widgetWithIcon(Card, Icons.chevron_right),
+      ),
+      findsOneWidget,
+      reason: '花费卡缺 chevron 可点提示',
+    );
+  }, skip: !enabled);
+}

integration_test/profile_avatar_live_test.dart

@@ -0,0 +1,471 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+import 'dart:ui' show ImageByteFormat;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:patbond_flutter/app/app.dart';
+import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
+import 'package:patbond_flutter/core/widgets/post_card.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:patbond_flutter/features/community/media_compression.dart';
+import 'package:patbond_flutter/features/community/media_picking.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/pets/pet_detail_page.dart';
+import 'package:patbond_flutter/features/profile/profile_edit_page.dart';
+
+/// 内存 token 存储（桌面实测环境无 keyring；不落任何持久化）。
+class _InMemoryTokenStore implements TokenStore {
+  final Map<String, String> _values = {};
+
+  @override
+  Future<String?> read(String key) async => _values[key];
+
+  @override
+  Future<void> write(String key, String value) async => _values[key] = value;
+
+  @override
+  Future<void> delete(String key) async => _values.remove(key);
+}
+
+/// 固定测试图：16×16 棋盘 PNG（87 字节）。
+///
+/// **刻意不用 1×1 的极小图**：1×1 的 PNG/JPEG 服务端照收、curl 也能原样取回，
+/// 但走 `NetworkImage` 的解码路径会抛「Codec failed to produce an image」，
+/// UI 于是落到 `RemoteImage` 的兜底占位——本机实测踩过这一格，很容易被误判
+/// 成「头像根本没传上去」。用一张最小的**多像素**图即可走通到真实像素。
+final Uint8List _pngBytes = base64Decode(
+  'iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAIAAACQkWg2AAAAHklEQVR42mOo0RV6Fc'
+  'FDPMlAkmogyTBqw6gNQ8YGAKJxBJBXv4+TAAAAAElFTkSuQmCC',
+);
+
+/// 桌面替身：选图直接给上面那张 JPEG（Linux 无 image_picker 原生实现）。
+class _DesktopPicker implements MediaImagePicker {
+  int calls = 0;
+
+  @override
+  Future<List<PickedMediaImage>> pickImages({required int limit}) async {
+    calls += 1;
+    return [PickedMediaImage(bytes: _pngBytes, name: 'avatar.png')];
+  }
+}
+
+/// 桌面替身：压缩原样透传（Linux 无 flutter_image_compress 原生实现）。
+class _PassthroughCompressor implements MediaImageCompressor {
+  const _PassthroughCompressor();
+
+  @override
+  Future<CompressedMediaImage> compress(
+    PickedMediaImage source, {
+    required int quality,
+  }) async => CompressedMediaImage(bytes: source.bytes, mimeType: 'image/png');
+}
+
+/// M3.5-08/09/10 compose 真链路桌面实测（默认跳过，不计入常规测试套件）：
+///
+/// ```bash
+/// # 先起后端六容器（patbond-api 仓库根 docker compose up -d --build），再：
+/// PATBOND_PROFILE_LIVE=1 \
+///   flutter test integration_test/profile_avatar_live_test.dart -d linux
+/// ```
+///
+/// 驱动**真实 App**（Linux 桌面 GTK 渲染 + 真实 HTTP + 真实 MinIO）走一遍：
+/// UI 注册 → 首页问候语显示用户名 → 资料页显示真实用户名与零值统计 →
+/// 设昵称 → 首页问候语与资料页同步变昵称 → Feed 作者名同步（验证服务端
+/// `/internal/users/profiles` 的 SQL 回退链）→ 传用户头像 → 宠物详情传头像。
+///
+/// 只有**选图与压缩两层**是桌面替身；createUpload / 预签名 PUT 直传 /
+/// confirm / PATCH 全为生产实现。逐步截图落到 `build/profile-live/`。
+void main() {
+  final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+  binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
+
+  final enabled = Platform.environment['PATBOND_PROFILE_LIVE'] == '1';
+  const authBase = 'http://127.0.0.1:8081';
+  const petBase = 'http://127.0.0.1:8083';
+  const communityBase = 'http://127.0.0.1:8084';
+  final shotDir = Directory('build/profile-live');
+  const rootKey = ValueKey<String>('profile-live-root');
+
+  Future<void> shot(WidgetTester tester, String name) async {
+    final boundary = tester.renderObject<RenderRepaintBoundary>(
+      find.byKey(rootKey),
+    );
+    await tester.runAsync(() async {
+      if (!shotDir.existsSync()) shotDir.createSync(recursive: true);
+      final image = await boundary.toImage(pixelRatio: 1.5);
+      final bytes = await image.toByteData(format: ImageByteFormat.png);
+      File(
+        '${shotDir.path}/$name.png',
+      ).writeAsBytesSync(bytes!.buffer.asUint8List());
+      debugPrint('[shot] $name (${bytes.lengthInBytes} bytes)');
+    });
+  }
+
+  Future<void> pumpUntil(
+    WidgetTester tester,
+    Finder finder, {
+    Duration timeout = const Duration(seconds: 30),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (finder.evaluate().isNotEmpty) return;
+    }
+    fail('等待超时：$finder');
+  }
+
+  Future<void> pumpUntilGone(
+    WidgetTester tester,
+    Finder finder, {
+    Duration timeout = const Duration(seconds: 30),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (finder.evaluate().isEmpty) return;
+    }
+    fail('等待消失超时：$finder');
+  }
+
+  /// 让出**真实时间**：`pump(Duration)` 只推进一帧（把动画时钟往前拨，
+  /// 并不真的等 5 秒），等网络/等服务端缓存过期必须走 [WidgetTester.runAsync]。
+  Future<void> settleReal(
+    WidgetTester tester, {
+    Duration wait = const Duration(seconds: 2),
+  }) async {
+    await tester.runAsync(() => Future<void>.delayed(wait));
+    for (var i = 0; i < 6; i++) {
+      await tester.pump(const Duration(milliseconds: 120));
+    }
+  }
+
+  /// 在指定滚动容器里向下滚到目标可见（资料页/列表页的底部入口都需要）。
+  Future<void> scrollTo(
+    WidgetTester tester,
+    Finder list,
+    Finder target, {
+    int maxDrags = 10,
+  }) async {
+    for (var i = 0; i < maxDrags && target.evaluate().isEmpty; i++) {
+      await tester.drag(list, const Offset(0, -300));
+      await tester.pump(const Duration(milliseconds: 300));
+    }
+  }
+
+  Future<Map<String, dynamic>> postJson(
+    String url,
+    Map<String, Object?> body, {
+    String? bearer,
+  }) async {
+    final client = HttpClient();
+    final request = await client.postUrl(Uri.parse(url));
+    request.headers.contentType = ContentType.json;
+    request.headers.set('Idempotency-Key', DateTime.now().toIso8601String());
+    if (bearer != null) {
+      request.headers.set(HttpHeaders.authorizationHeader, 'Bearer $bearer');
+    }
+    request.add(utf8.encode(jsonEncode(body)));
+    final response = await request.close();
+    final text = await response.transform(utf8.decoder).join();
+    client.close();
+    expect(response.statusCode, anyOf(200, 201), reason: 'POST $url：$text');
+    final envelope = jsonDecode(text) as Map<String, dynamic>;
+    expect(envelope['code'], 0, reason: 'POST $url 业务码非 0：$text');
+    return envelope['data'] as Map<String, dynamic>;
+  }
+
+  String greetingPrefix() {
+    final hour = DateTime.now().hour;
+    if (hour < 6) return '夜深了';
+    if (hour < 11) return '早上好';
+    if (hour < 14) return '中午好';
+    if (hour < 18) return '下午好';
+    return '晚上好';
+  }
+
+  testWidgets('桌面真链路：注册 → 资料真实化 → 设昵称 → 传头像 → Feed 作者名 → 宠物头像', (tester) async {
+    final picker = _DesktopPicker();
+    final seed = DateTime.now().millisecondsSinceEpoch;
+    final username = 'plive$seed';
+    final password = 'Live1234!$seed';
+    final phone = '+86137${(seed % 100000000).toString().padLeft(8, '0')}';
+    // 昵称与帖文都带 seed：Feed 是全局的，同名会让断言认错卡片。
+    final nickname = '实测柴${seed % 1000000}';
+    final postContent = '资料页实测帖 $seed';
+
+    await tester.pumpWidget(
+      RepaintBoundary(
+        key: rootKey,
+        child: App(
+          sessionManager: SessionManager(store: _InMemoryTokenStore()),
+          avatarUploaderFactory: (repository, purpose) => MediaUploader(
+            repository: repository,
+            purpose: purpose,
+            maxImages: 1,
+            maxConcurrentUploads: 1,
+            picker: picker,
+            compressor: const _PassthroughCompressor(),
+          ),
+        ),
+      ),
+    );
+
+    // ---- 步骤 1：UI 注册（注册面不收昵称，ADR-022 决策 D3.5-5）----
+    await pumpUntil(tester, find.text('立即注册'));
+    await tester.tap(find.text('立即注册'));
+    await pumpUntil(tester, find.text('创建账号'));
+    // live binding 下首个 enterText 常被丢（焦点还没建立），故每格「点入 →
+    // 输入 → 验值 → 必要时重输」，本机实测踩过这一格。
+    for (final entry in [
+      (0, username),
+      (1, phone.substring(3)),
+      (2, password),
+      (3, password),
+    ]) {
+      final field = find.byType(TextField).at(entry.$1);
+      for (var attempt = 0; attempt < 3; attempt++) {
+        await tester.tap(field);
+        await tester.pump(const Duration(milliseconds: 200));
+        await tester.enterText(field, entry.$2);
+        await tester.pump(const Duration(milliseconds: 300));
+        if (tester.widget<TextField>(field).controller?.text == entry.$2) break;
+      }
+      expect(
+        tester.widget<TextField>(field).controller?.text,
+        entry.$2,
+        reason: '注册表单第 ${entry.$1} 格未收到输入',
+      );
+    }
+    await shot(tester, '01-register');
+    await tester.tap(find.widgetWithText(FilledButton, '注册'));
+
+    // ---- 步骤 2：主壳挂载 → 等 /me 到手（资料页与首页共用这一次请求）----
+    await pumpUntil(tester, find.text('我的'));
+    await pumpUntil(tester, find.text('${greetingPrefix()}，$username 👋'));
+    await shot(tester, '02-home-greeting-username');
+
+    // 借真实会话种一篇帖与一只宠物（UI 发帖/建档已有各自实测覆盖）。
+    final tokens = await tester.runAsync(
+      () => postJson('$authBase/api/v1/auth/login', {
+        'username': username,
+        'password': password,
+      }),
+    );
+    final accessToken = tokens!['accessToken'] as String;
+    await tester.runAsync(
+      () => postJson('$communityBase/api/v1/posts', {
+        'category': 'general',
+        'content': postContent,
+        'status': 'published',
+      }, bearer: accessToken),
+    );
+    final pet = await tester.runAsync(
+      () => postJson('$petBase/api/v1/pets', {
+        'name': '实测豆豆',
+        'species': 'dog',
+        'sex': 'male',
+        'customBreedName': '中华田园犬',
+      }, bearer: accessToken),
+    );
+
+    // ---- 步骤 2.5：登出 → UI 登录 ----
+    // 覆盖登录链路，同时让三个控制器重新预取：登出即 reset 是「跨账号不
+    // 泄漏」的既有纪律（app.dart），重登后各 Tab 从 initial 重新拉取，
+    // 于是上面用 API 种下的帖与宠物才会进入内存副本。
+    await tester.tap(find.text('我的'));
+    await pumpUntil(tester, find.text('@$username'));
+    final profileList = find
+        .ancestor(of: find.text('@$username'), matching: find.byType(ListView))
+        .first;
+    await scrollTo(tester, profileList, find.text('切换账号或退出登录'));
+    await pumpUntil(tester, find.text('切换账号或退出登录'));
+    await tester.tap(find.text('切换账号或退出登录'));
+    await pumpUntil(tester, find.text('立即注册'));
+    for (final entry in [(0, username), (1, password)]) {
+      final field = find.byType(TextField).at(entry.$1);
+      for (var attempt = 0; attempt < 3; attempt++) {
+        await tester.tap(field);
+        await tester.pump(const Duration(milliseconds: 200));
+        await tester.enterText(field, entry.$2);
+        await tester.pump(const Duration(milliseconds: 300));
+        if (tester.widget<TextField>(field).controller?.text == entry.$2) break;
+      }
+    }
+    await tester.tap(find.widgetWithText(FilledButton, '登录'));
+    await pumpUntil(tester, find.text('我的'));
+    await pumpUntil(tester, find.text('${greetingPrefix()}，$username 👋'));
+
+    // ---- 步骤 3：资料页展示真实用户名 + 零值统计（不是 demo 的 24/1.8k/2）----
+    await tester.tap(find.text('我的'));
+    await pumpUntil(tester, find.text('@$username'));
+    await shot(tester, '03-profile-real-username');
+    expect(find.text('萌宠新手（豆豆家长）'), findsNothing);
+    expect(find.text('1.8k'), findsNothing);
+    expect(find.text('获赞'), findsOneWidget);
+    // 统计来自服务端：刚发了 1 帖、没人赞 → 作品 1 / 获赞 0。
+    expect(
+      find.descendant(
+        of: find
+            .ancestor(of: find.text('我的作品'), matching: find.byType(Column))
+            .first,
+        matching: find.text('1'),
+      ),
+      findsOneWidget,
+      reason: '作品数应为服务端聚合的 1',
+    );
+
+    // ---- 步骤 4：设昵称 ----
+    await tester.tap(find.widgetWithText(OutlinedButton, '编辑资料'));
+    await pumpUntil(tester, find.byType(ProfileEditPage));
+    expect(
+      find.text('未设置，当前展示为用户名「$username」'),
+      findsOneWidget,
+      reason: '编辑页不该把 username 预填进昵称框',
+    );
+    await shot(tester, '04-profile-edit-empty');
+    await tester.enterText(find.byType(TextField).first, nickname);
+    await tester.pump(const Duration(milliseconds: 300));
+    await tester.tap(find.widgetWithText(FilledButton, '保存'));
+    await pumpUntilGone(tester, find.byType(ProfileEditPage));
+    await pumpUntil(tester, find.text(nickname));
+    await shot(tester, '05-profile-nickname-set');
+
+    // ---- 步骤 5：上传用户头像（真实两步上传 + PATCH）----
+    await tester.tap(find.widgetWithText(OutlinedButton, '编辑资料'));
+    await pumpUntil(tester, find.byType(ProfileEditPage));
+    await tester.tap(find.widgetWithText(TextButton, '更换头像'));
+    await pumpUntil(tester, find.text('使用这张'));
+    await shot(tester, '06-avatar-sheet-ready');
+    await tester.tap(find.text('使用这张'));
+    await pumpUntil(tester, find.text('已选择\n新头像'));
+    await tester.tap(find.widgetWithText(FilledButton, '保存'));
+    await pumpUntilGone(tester, find.byType(ProfileEditPage));
+    await pumpUntil(tester, find.text('资料已更新'));
+    await settleReal(tester);
+    await shot(tester, '07-profile-avatar-uploaded');
+    expect(picker.calls, 1);
+
+    // ---- 步骤 6：首页问候语 + Feed 作者名同步为昵称 ----
+    await tester.tap(find.text('首页'));
+    await pumpUntil(tester, find.text('${greetingPrefix()}，$nickname 👋'));
+    await shot(tester, '08-home-greeting-nickname');
+
+    // Feed 首屏是在设昵称之前拉的，故先下拉刷新——作者名要变必须重取，
+    // 这一步同时验证服务端 `/internal/users/profiles` 的 SQL 回退链
+    // （客户端对 FeedCard.author.nickname 不做任何拼装）。
+    final feedList = find.byType(ListView).first;
+    // ⚠️ 服务端有意的滞后：community 的 AuthorProfileGateway 把
+    // `/internal/users/profiles` 的结果放在 60s TTL 的进程内缓存里
+    // （`patbond.author-profile.cache-ttl`，M3 T3-05）。首屏 Feed 是设昵称
+    // 之前拉的，那次已把「作者名 = username」写进缓存，所以立刻下拉刷新
+    // 仍是旧名——这不是客户端 bug，客户端对作者名不做任何拼装。
+    // 故先等过 TTL，再刷新验证同步。
+    await settleReal(tester, wait: const Duration(seconds: 65));
+    var authorSynced = false;
+    for (var round = 0; round < 3 && !authorSynced; round++) {
+      // 逐段 moveBy + 抬手才会触发 RefreshIndicator（fling 的速度语义被当成
+      // 普通滚动，本机实测过）；随后必须循环 pump 让真实 HTTP 有时间完成。
+      final pull = await tester.startGesture(
+        tester.getTopLeft(feedList) + const Offset(200, 120),
+      );
+      for (var i = 0; i < 6; i++) {
+        await pull.moveBy(const Offset(0, 60));
+        await tester.pump(const Duration(milliseconds: 80));
+      }
+      await pull.up();
+      await settleReal(tester, wait: const Duration(seconds: 3));
+      for (var i = 0; i < 8 && find.text(postContent).evaluate().isEmpty; i++) {
+        await tester.drag(feedList, const Offset(0, -240));
+        await tester.pump(const Duration(milliseconds: 400));
+      }
+      if (find.text(postContent).evaluate().isNotEmpty) {
+        final card = find.ancestor(
+          of: find.text(postContent),
+          matching: find.byType(PostCard),
+        );
+        debugPrint(
+          '[live] 第 $round 轮我的卡片文本：'
+          '${tester.widgetList<Text>(find.descendant(of: card, matching: find.byType(Text))).map((t) => t.data).join(' | ')}',
+        );
+        authorSynced = find
+            .descendant(of: card, matching: find.text(nickname))
+            .evaluate()
+            .isNotEmpty;
+      }
+      if (!authorSynced) {
+        await tester.drag(feedList, const Offset(0, 2000));
+        await tester.pump(const Duration(milliseconds: 400));
+      }
+    }
+    expect(
+      authorSynced,
+      isTrue,
+      reason: 'Feed 作者名未随昵称变化（服务端 /internal 回退链或刷新未生效）',
+    );
+    await shot(tester, '09-feed-author-nickname');
+
+    // ---- 步骤 7：宠物详情传头像（WRITE 档，纯头像 PATCH）----
+    await tester.tap(find.text('档案'));
+    await pumpUntil(tester, find.text('实测豆豆'));
+    await shot(tester, '10a-pets-list-avatar-placeholder');
+    await tester.tap(find.text('实测豆豆'));
+    await pumpUntil(tester, find.byType(PetDetailPage));
+    await shot(tester, '10-pet-detail-placeholder-avatar');
+    expect(
+      tester
+          .widgetList<PetAvatar>(find.byType(PetAvatar))
+          .any((a) => a.url == null),
+      isTrue,
+      reason: '上传前应是爪印占位',
+    );
+    await tester.tap(find.byType(PetAvatar).first);
+    await pumpUntil(tester, find.text('使用这张'));
+    await tester.tap(find.text('使用这张'));
+    await pumpUntil(tester, find.text('头像已更新'));
+    await settleReal(tester, wait: const Duration(seconds: 6));
+    await shot(tester, '11-pet-avatar-uploaded');
+    final detailAvatarUrl = tester
+        .widgetList<PetAvatar>(find.byType(PetAvatar))
+        .map((a) => a.url)
+        .whereType<String>()
+        .firstOrNull;
+    debugPrint('[live] 详情头像 URL：$detailAvatarUrl');
+    final imageStatus = await tester.runAsync(() async {
+      final client = HttpClient();
+      final response = await (await client.getUrl(
+        Uri.parse(detailAvatarUrl!),
+      )).close();
+      final bytes = await response.fold<int>(0, (n, chunk) => n + chunk.length);
+      client.close();
+      return '${response.statusCode} / $bytes bytes';
+    });
+    debugPrint('[live] 应用进程内直取头像：$imageStatus');
+    expect(imageStatus, startsWith('200'), reason: '预签名头像 URL 应可直取');
+    // 真的画出了像素：详情头像下必须有 Image，且不是 RemoteImage 的兜底
+    // 占位（占位是 Icon(Icons.pets)，画不出图时才出现）。
+    final detailAvatar = find.byWidgetPredicate(
+      (widget) => widget is PetAvatar && widget.showEditBadge,
+    );
+    expect(
+      find.descendant(of: detailAvatar, matching: find.byType(Image)),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: detailAvatar, matching: find.byIcon(Icons.pets)),
+      findsNothing,
+      reason: '仍是爪印占位说明图没画出来（后端对了但 UI 没显示）',
+    );
+    expect(
+      tester
+          .widgetList<PetAvatar>(find.byType(PetAvatar))
+          .any((a) => (a.url ?? '').contains('pet_avatar')),
+      isTrue,
+      reason: '详情页头像应换成 pet_avatar 前缀的预签名 URL',
+    );
+    debugPrint('[live] petId=${pet!['id']} username=$username');
+  }, skip: !enabled);
+}

integration_test/publish_live_test.dart

@@ -0,0 +1,193 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:patbond_flutter/app/app.dart';
+import 'package:patbond_flutter/core/widgets/post_card.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:patbond_flutter/features/community/media_compression.dart';
+import 'package:patbond_flutter/features/community/media_picking.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+
+/// 内存 token 存储（桌面实测环境无 keyring；不落任何持久化）。
+class _InMemoryTokenStore implements TokenStore {
+  final Map<String, String> _values = {};
+
+  @override
+  Future<String?> read(String key) async => _values[key];
+
+  @override
+  Future<void> write(String key, String value) async => _values[key] = value;
+
+  @override
+  Future<void> delete(String key) async => _values.remove(key);
+}
+
+/// 1x1 真 PNG（70B）：桌面实测的「选中的照片」。
+final Uint8List _pngBytes = base64Decode(
+  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAF'
+  'AAH/q842iQAAAABJRU5ErkJggg==',
+);
+
+/// 桌面选图替身：Linux 桌面无 image_picker 平台实现，实测注入字节。
+class _DesktopPicker implements MediaImagePicker {
+  @override
+  Future<List<PickedMediaImage>> pickImages({required int limit}) async => [
+    PickedMediaImage(bytes: _pngBytes, name: 'live.png'),
+  ];
+}
+
+/// 桌面压缩替身：Linux 桌面无 flutter_image_compress 原生实现，原样透传
+/// （mime 落 image/png，在服务端白名单内）。其余环节全为生产实现。
+class _PassthroughCompressor implements MediaImageCompressor {
+  @override
+  Future<CompressedMediaImage> compress(
+    PickedMediaImage source, {
+    required int quality,
+  }) async => CompressedMediaImage(bytes: source.bytes, mimeType: 'image/png');
+}
+
+/// T3-17 发布链路桌面真链路实测（默认跳过，不计入常规测试套件）：
+///
+/// ```bash
+/// # 先起后端六容器（patbond-api 仓库根：docker compose up -d --build），再：
+/// PATBOND_PUBLISH_LIVE=1 flutter test integration_test/publish_live_test.dart -d linux
+/// ```
+///
+/// 驱动**真实 App**（Linux 桌面渲染 + 真实 HTTP + MinIO 预签名直传）：
+/// 注册两个一次性账号 → A 登录 → 创作 Tab「发布动态」→ 输入正文 → 选图
+/// 上传（真 createUpload / 真预签名 PUT / 真 confirm）→ 发布（建草稿 →
+/// PATCH 迁移）→ 回首页 Feed 新帖置顶可见 → **另起一个全新 App 实例
+/// （新会话/新控制器/新 HTTP 客户端）以 B 账号登录，B 的 Feed 同样看到
+/// 该帖**（M3 验收「发布后可在另一客户端看到」取证）。
+///
+/// 桌面替身仅两处：选图与压缩（Linux 无这两个插件的平台实现）。
+/// 注意：桌面 `platform` 值为 `linux`，不在契约枚举内 → 埋点批次被服务端
+/// 400 整批拒绝（既有预期行为，见 analytics_service.dart 注释）；埋点落库
+/// 取证走 curl（26 号报告 §5c）。
+void main() {
+  final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+  binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
+
+  final enabled = Platform.environment['PATBOND_PUBLISH_LIVE'] == '1';
+  const authBase = 'http://127.0.0.1:8081';
+
+  Future<void> pumpUntil(
+    WidgetTester tester,
+    Finder finder, {
+    Duration timeout = const Duration(seconds: 30),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (finder.evaluate().isNotEmpty) return;
+    }
+    fail('等待超时：$finder');
+  }
+
+  Future<void> register(String username, String password, int seed) async {
+    final client = HttpClient();
+    final request = await client.postUrl(
+      Uri.parse('$authBase/api/v1/auth/register'),
+    );
+    request.headers.contentType = ContentType.json;
+    request.add(
+      utf8.encode(
+        jsonEncode({
+          'username': username,
+          'phone': '+86137${(seed % 100000000).toString().padLeft(8, '0')}',
+          'password': password,
+        }),
+      ),
+    );
+    final response = await request.close();
+    expect(response.statusCode, 200, reason: '注册测试账号失败：$username');
+    client.close();
+  }
+
+  Future<void> login(
+    WidgetTester tester,
+    String username,
+    String password,
+  ) async {
+    await pumpUntil(tester, find.text('登录'));
+    await tester.enterText(find.byType(TextField).at(0), username);
+    await tester.enterText(find.byType(TextField).at(1), password);
+    await tester.tap(find.text('登录'));
+  }
+
+  testWidgets('发布桌面真链路：选图上传 → 发布 → Feed 置顶 → 第二账号可见', (tester) async {
+    final seed = DateTime.now().millisecondsSinceEpoch;
+    final authorName = 'publive$seed';
+    final readerName = 'pubread$seed';
+    const password = 'Live1234!publish';
+    final marker = '真链路发布 $seed';
+
+    await register(authorName, password, seed);
+    await register(readerName, password, seed + 1);
+
+    await tester.pumpWidget(
+      App(
+        sessionManager: SessionManager(store: _InMemoryTokenStore()),
+        mediaUploaderFactory: (repository, analytics) => MediaUploader(
+          repository: repository,
+          picker: _DesktopPicker(),
+          compressor: _PassthroughCompressor(),
+          analytics: analytics,
+        ),
+      ),
+    );
+
+    // ---- A 登录并发布（正文 + 一张真上传的图）----
+    await login(tester, authorName, password);
+    await pumpUntil(tester, find.text('创作'));
+    await tester.tap(find.text('创作'));
+    await pumpUntil(tester, find.text('发布动态'));
+    await tester.tap(find.text('发布动态'));
+    await pumpUntil(tester, find.widgetWithText(TextButton, '存草稿'));
+
+    await tester.enterText(find.byType(TextField).first, marker);
+    await tester.pump(const Duration(milliseconds: 300));
+    await tester.tap(find.byIcon(Icons.add_photo_alternate_outlined));
+    // 上传全程（createUpload → 预签名 PUT → confirm）走真实链路。
+    await pumpUntil(tester, find.byType(Image));
+    final publish = find.widgetWithText(FilledButton, '发布');
+    for (var i = 0; i < 120; i++) {
+      await tester.pump(const Duration(milliseconds: 250));
+      if (tester.widget<FilledButton>(publish).onPressed != null) break;
+    }
+    expect(
+      tester.widget<FilledButton>(publish).onPressed,
+      isNotNull,
+      reason: '图片未在 30s 内 ready，发布钮仍禁用',
+    );
+    await tester.tap(publish);
+
+    // ---- 回首页 Feed：新帖置顶可见 ----
+    await pumpUntil(tester, find.byType(PostCard));
+    await pumpUntil(tester, find.textContaining(marker));
+    final cards = tester.widgetList<PostCard>(find.byType(PostCard)).toList();
+    expect(cards.first.card.contentPreview, contains(marker));
+    expect(cards.first.card.mediaCount, 1);
+
+    // ---- 第二客户端（全新 App 实例 + 全新会话）：B 登录后同样看到该帖 ----
+    // 换 key 强制重建整棵树：新的 SessionManager / Controller / HTTP 客户端，
+    // 等价于另一台客户端首次登录（不是同一实例内的账号切换）。
+    await tester.pumpWidget(
+      App(
+        key: const ValueKey('client-b'),
+        sessionManager: SessionManager(store: _InMemoryTokenStore()),
+      ),
+    );
+    await login(tester, readerName, password);
+    await pumpUntil(tester, find.byType(PostCard));
+    await pumpUntil(tester, find.textContaining(marker));
+    final readerCards = tester
+        .widgetList<PostCard>(find.byType(PostCard))
+        .toList();
+    expect(readerCards.first.card.contentPreview, contains(marker));
+  }, skip: !enabled);
+}

lib/analytics/analytics_page_name.dart

@@ -19,7 +19,10 @@ enum AnalyticsPageName {
   create('create'),
   petArchive('pet_archive'),
   services('services'),
-  postDetail('post_detail');
+  postDetail('post_detail'),
+  // —— 字典 v3 页面族（22 号报告 §2；本枚举登记 M3 已落地页）——
+  /// 发布页（P3，T3-17 push 全屏页）。
+  postForm('post_form');
 
   const AnalyticsPageName(this.pageName);
 

lib/app/app.dart

@@ -5,21 +5,27 @@ import 'package:patbond_flutter/analytics/analytics_route_observer.dart';
 import 'package:patbond_flutter/analytics/analytics_service.dart';
 import 'package:patbond_flutter/analytics/page_view_tracker.dart';
 import 'package:patbond_flutter/analytics/session_tracker.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/network/api_client.dart';
 import 'package:patbond_flutter/core/network/token_refresher.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
 import 'package:patbond_flutter/features/auth/auth_repository.dart';
 import 'package:patbond_flutter/features/auth/login_page.dart';
 import 'package:patbond_flutter/features/auth/session_manager.dart';
 import 'package:patbond_flutter/features/auth/splash_page.dart';
 import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
 import 'package:patbond_flutter/features/community/community_repository.dart';
 import 'package:patbond_flutter/features/community/feed_analytics.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
 import 'package:patbond_flutter/features/main/main_shell_page.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
 import 'package:patbond_flutter/features/pets/pet_analytics.dart';
 import 'package:patbond_flutter/features/pets/pets_controller.dart';
 import 'package:patbond_flutter/features/pets/pets_repository.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
 import 'package:patbond_flutter/state/app_state.dart';
 
 class App extends StatefulWidget {
@@ -29,6 +35,8 @@ class App extends StatefulWidget {
     this.authRepository,
     this.petsRepository,
     this.communityRepository,
+    this.mediaUploaderFactory,
+    this.avatarUploaderFactory,
   });
 
   /// 测试注入口；生产默认走安全存储 + 真实 API。
@@ -37,6 +45,14 @@ class App extends StatefulWidget {
   final PetsRepository? petsRepository;
   final CommunityRepository? communityRepository;
 
+  /// 发布页媒体上传器构造口（桌面实测替换选图/压缩层；生产为 null）。
+  final MediaUploaderFactory? mediaUploaderFactory;
+
+  /// 头像上传器构造口（T3.5-08/09）。生产为 null → 走
+  /// [defaultAvatarUploader]；桌面实测与集成测试在此替换选图/压缩层
+  /// （Linux 桌面无 image_picker / 压缩原生实现），网络三段仍是生产实现。
+  final AvatarUploaderFactory? avatarUploaderFactory;
+
   @override
   State<App> createState() => _AppState();
 }
@@ -47,9 +63,13 @@ class _AppState extends State<App> {
   late final AuthRepository authRepository;
   late final PetsController petsController;
   late final CommunityController communityController;
+  late final ProfileController profileController;
+  late final AvatarUploaderBuilder _avatarUploaderBuilder;
   late final PetAnalytics petAnalytics;
   late final HealthRecordAnalytics healthRecordAnalytics;
   late final FeedAnalytics feedAnalytics;
+  late final CommunityInteractionAnalytics interactionAnalytics;
+  late final PostAnalytics postAnalytics;
   late final SessionTracker _sessionTracker;
   late final AnalyticsService _analytics;
   late final PageViewTracker _pageViewTracker;
@@ -95,13 +115,32 @@ class _AppState extends State<App> {
     petsController = PetsController(
       repository: widget.petsRepository ?? _buildPetsRepository(),
     );
-    // T3-14：Feed segment 接线主壳（数据层 T3-12 就位）。
+    // T3-14：Feed segment 接线主壳（数据层 T3-12 就位）；T3-16 起
+    // 点赞/收藏成功埋点经 interactionAnalytics 在 controller 内上报。
+    interactionAnalytics = CommunityInteractionAnalytics(_analytics.trackEvent);
+    final communityRepository =
+        widget.communityRepository ?? _buildCommunityRepository();
     communityController = CommunityController(
-      repository: widget.communityRepository ?? _buildCommunityRepository(),
+      repository: communityRepository,
+      interactionAnalytics: interactionAnalytics,
     );
+    // T3.5-08/10：资料与统计单例，资料 Tab 与首页问候语共用（一次 /me
+    // 供两个消费点，改昵称后两处同时变）。
+    profileController = ProfileController(
+      authRepository: authRepository,
+      communityRepository: communityRepository,
+    );
+    // 头像上传：purpose 由调用页给定（user_avatar / pet_avatar）。仓库复用
+    // community 仓库——media 两步上传端点由 user 服务提供，已在
+    // _buildCommunityRepository 里单独接线（mediaApi）。
+    final avatarFactory = widget.avatarUploaderFactory ?? defaultAvatarUploader;
+    _avatarUploaderBuilder = (purpose) =>
+        avatarFactory(communityRepository, purpose);
     petAnalytics = PetAnalytics(_analytics.trackEvent);
     healthRecordAnalytics = HealthRecordAnalytics(_analytics.trackEvent);
     feedAnalytics = FeedAnalytics(_analytics.trackEvent);
+    // T3-17：发布漏斗五事件 + 媒体上传三段（发布页与 MediaUploader 消费）。
+    postAnalytics = PostAnalytics(_analytics.trackEvent);
 
     // 认证状态切换补点（根路由 AnimatedSwitcher 无路由事件）
     sessionManager.addListener(_reportAuthStateChange);
@@ -134,8 +173,19 @@ class _AppState extends State<App> {
       session: sessionManager,
       refresher: refresher,
     );
+    // `/api/v1/me` 由 user 服务（:8082）提供，auth（:8081）上没有该路由，
+    // 故单独接一条 user 线路（与 community 仓库的 mediaApi 同构）。
+    final userApi = ApiClient(
+      dio: buildPatbondDio(
+        session: sessionManager,
+        baseUrl: patbondUserApiBaseUrl,
+      ),
+      session: sessionManager,
+      refresher: refresher,
+    );
     return ApiAuthRepository(
       api: api,
+      userApi: userApi,
       session: sessionManager,
       refresher: refresher,
       analytics: _analytics,
@@ -190,10 +240,12 @@ class _AppState extends State<App> {
   }
 
   void _reportAuthStateChange() {
-    // 登出即清宠物档案与社区 Feed 内存副本（跨账号不泄漏；重登后重新拉取）。
+    // 登出即清宠物档案、社区 Feed 与本人资料内存副本（跨账号不泄漏；
+    // 重登后重新拉取）。
     if (sessionManager.status == AuthStatus.unauthenticated) {
       petsController.reset();
       communityController.reset();
+      profileController.reset();
     }
     // 认证状态机切页补点（03 §3.2 非路由曝光 1/2）
     final page = switch (sessionManager.status) {
@@ -212,6 +264,7 @@ class _AppState extends State<App> {
     appState.dispose();
     petsController.dispose();
     communityController.dispose();
+    profileController.dispose();
     if (widget.sessionManager == null) sessionManager.dispose();
     super.dispose();
   }
@@ -235,9 +288,15 @@ class _AppState extends State<App> {
           appState: appState,
           petsController: petsController,
           communityController: communityController,
+          profileController: profileController,
+          currentUserId: sessionManager.userId,
           petAnalytics: petAnalytics,
           healthRecordAnalytics: healthRecordAnalytics,
           feedAnalytics: feedAnalytics,
+          interactionAnalytics: interactionAnalytics,
+          postAnalytics: postAnalytics,
+          mediaUploaderFactory: widget.mediaUploaderFactory,
+          avatarUploaderBuilder: _avatarUploaderBuilder,
           pageViewTracker: _pageViewTracker,
           onLogout: authRepository.logout,
         );
@@ -250,6 +309,11 @@ class _AppState extends State<App> {
       title: 'Patbond',
       debugShowCheckedModeBanner: false,
       theme: buildAppTheme(),
+      // M3.5-01：Material 内置组件中文化（此前未配 delegate，日期选择器等
+      // 全部回退英文兜底）。单语言 zh-CN，不随设备语言回退英文。
+      localizationsDelegates: appLocalizationsDelegates,
+      supportedLocales: appSupportedLocales,
+      locale: appLocale,
       navigatorObservers: [_routeObserver],
       home: ListenableBuilder(
         listenable: sessionManager,

lib/app/app_localization.dart

@@ -0,0 +1,31 @@
+/// 应用本地化配置（M3.5-01）。
+///
+/// 根因备忘：M3 之前 [MaterialApp] 未配任何 `localizationsDelegates`，
+/// Flutter 回退到内置的 `DefaultMaterialLocalizations`（仅英文），导致
+/// 一切 Material 内置组件（日期选择器标题「Select date」、确定/取消
+/// 「OK」/「Cancel」、模式切换 tooltip「Switch to input」、格式报错
+/// 「Invalid format.」）全英文，而业务自绘文案全中文——同一弹窗内中英混排。
+/// 挂上三件套后分别为「选择日期 / 确定 / 取消 / 切换到输入模式 / 格式无效。」。
+///
+/// 这里把三件套 delegate 与 locale 收在一处，供 `App` 与 widget 测试共用：
+/// 测试若只 `pumpWidget(MaterialApp(home: ...))` 而不带 delegate，看到的仍是
+/// 英文兜底，与真机不一致；需要断言中文渲染的测试请一并挂上本文件的常量。
+library;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
+
+/// Material / Cupertino / Widgets 三件套本地化 delegate。
+const List<LocalizationsDelegate<Object>> appLocalizationsDelegates =
+    <LocalizationsDelegate<Object>>[
+      GlobalMaterialLocalizations.delegate,
+      GlobalCupertinoLocalizations.delegate,
+      GlobalWidgetsLocalizations.delegate,
+    ];
+
+/// 简体中文（中国大陆）。M3.5 仅单语言，暂不做语言切换。
+const Locale appLocale = Locale('zh', 'CN');
+
+/// 支持语言列表。仅 zh-CN——避免设备语言为英文时回退到英文，
+/// 造成同一界面内业务中文 + 组件英文的混排。
+const List<Locale> appSupportedLocales = <Locale>[appLocale];

lib/core/models/patch_field.dart

@@ -0,0 +1,65 @@
+import 'package:flutter/foundation.dart';
+
+/// PATCH 请求的**三态字段**：契约 v1.4.0 对「昵称 / 头像」两类天生可选的
+/// 字段定型为三态语义（`UpdateMeRequest` 与 `UpdatePetRequest.avatarAssetId`）：
+///
+/// | 态 | JSON 表现 | 服务端语义 |
+/// | --- | --- | --- |
+/// | [PatchField.absent] | **键不出现** | 不改 |
+/// | [PatchField.clear] | 键出现且值为 `null` | 清空 |
+/// | [PatchField.value] | 键出现且有值 | 设置 |
+///
+/// Dart 的 `String?` 只有两态（有值 / null），无法区分「不改」与「清空」——
+/// 若把「不改」也编码为 `null`，未改动的字段会被服务端当成清空指令执行
+/// （用户只改昵称，头像就被顺手删了）。故三态必须由类型承载，
+/// 不能靠 `T?` 加约定。
+///
+/// 序列化一律经 [writeTo]：它是「absent 不落键」这条纪律的唯一实现处，
+/// 各请求 DTO 不自行拼 map，避免某处漏写 `isPresent` 判断。
+@immutable
+class PatchField<T extends Object> {
+  /// 不改：键不出现在 JSON 里。
+  const PatchField.absent() : _present = false, _value = null;
+
+  /// 清空：键出现且值为 `null`。
+  const PatchField.clear() : _present = true, _value = null;
+
+  /// 设置为 [value]。
+  const PatchField.value(T value) : _present = true, _value = value;
+
+  final bool _present;
+  final T? _value;
+
+  /// 本次 PATCH 是否触及该字段（决定键是否落进 JSON）。
+  bool get isPresent => _present;
+
+  /// 是否为「显式清空」（present 且值为 null）。
+  bool get isClear => _present && _value == null;
+
+  /// present 且有值时的值；absent 与 clear 均为 null（两者不可由此区分）。
+  T? get valueOrNull => _value;
+
+  /// 按三态把自己写进 [json]：absent 不落键；clear 落 `null`；
+  /// 有值时落 [encode] 的产物（缺省原样写入）。
+  void writeTo(
+    Map<String, Object?> json,
+    String key, {
+    Object? Function(T value)? encode,
+  }) {
+    if (!_present) return;
+    final value = _value;
+    json[key] = value == null ? null : (encode?.call(value) ?? value);
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      other is PatchField<T> &&
+      other._present == _present &&
+      other._value == _value;
+
+  @override
+  int get hashCode => Object.hash(_present, _value);
+
+  @override
+  String toString() => _present ? 'PatchField($_value)' : 'PatchField.absent()';
+}

lib/core/theme/app_theme.dart

@@ -176,6 +176,7 @@ ThemeData buildAppTheme() {
         borderRadius: BorderRadius.all(Radius.circular(AppRadius.md)),
       ),
     ),
+    datePickerTheme: _datePickerTheme,
     navigationBarTheme: NavigationBarThemeData(
       backgroundColor: AppColors.surface,
       indicatorColor: AppColors.surfaceTint,
@@ -194,3 +195,102 @@ ThemeData buildAppTheme() {
     ),
   );
 }
+
+/// 日期选择器主题（M3.5-01）。
+///
+/// 根因备忘：此前未定制，`showDatePicker` 完全走 `ColorScheme.fromSeed`
+/// 由珊瑚橙 `#FF6F4C` 派生出的 M3 调和色（选中日为暗红棕实底），
+/// 与全 app 品牌色脱节。这里只复用 05 号规范（iteration-2/05、iteration-3/05）
+/// 已审计过的色对，不新造色值：
+///
+/// | 位置 | 色对 | 对比度 | 来源 |
+/// | --- | --- | --- | --- |
+/// | 头部（帮助文字 + 标题 + 模式切换图标） | `surfaceTint` 底 + `primaryDark` | 7.98:1 | 选中 chip 同款（iteration-2/05 §3 D7） |
+/// | 选中日 / 选中年 | `primaryStrong` 底 + 白字 | 4.49:1 | FAB / 头像徽标同款（同 §2） |
+/// | 今日（未选中）描边与文字 | 白底 + `primaryStrong` | 4.49:1 | 同上 |
+/// | 未选中日 / 年 | 白底 + `ink` | ≥12:1 | 正文主色 |
+/// | 星期表头 | 白底 + `inkSoft` | 6.59:1 | 承载信息的次级文字（§3 DEBT-2） |
+/// | 越界不可选日 | 白底 + `muted` | 3.36:1 | 禁用态，DEBT-2 允许的 `muted` 用途 |
+/// | 确定 / 取消按钮 | 白底 + `primaryStrong` 文字 | 4.49:1 | 可点击文字链接（§1.1 token 注释） |
+final DatePickerThemeData _datePickerTheme = DatePickerThemeData(
+  backgroundColor: AppColors.surface,
+  elevation: 0,
+  surfaceTintColor: Colors.transparent,
+  shadowColor: Colors.transparent,
+  shape: const RoundedRectangleBorder(
+    borderRadius: BorderRadius.all(Radius.circular(AppRadius.xl)),
+    side: BorderSide(color: AppColors.border),
+  ),
+  dividerColor: AppColors.border,
+  headerBackgroundColor: AppColors.surfaceTint,
+  headerForegroundColor: AppColors.primaryDark,
+  headerHelpStyle: const TextStyle(
+    color: AppColors.primaryDark,
+    fontSize: 12,
+    fontWeight: FontWeight.w600,
+  ),
+  headerHeadlineStyle: const TextStyle(
+    color: AppColors.primaryDark,
+    // 22（默认 32 偏大）：中文 `formatMediumDate` 是「9月10日周四」5~6 字，
+    // 横屏侧栏头部宽度下 26 起就会折行，22 一行放得下。
+    fontSize: 22,
+    fontWeight: FontWeight.w800,
+  ),
+  // 年份下拉 / 上下月箭头一行：与头部同族深色，白底 8.74:1。
+  subHeaderForegroundColor: AppColors.primaryDark,
+  weekdayStyle: const TextStyle(
+    color: AppColors.inkSoft,
+    fontSize: 12,
+    fontWeight: FontWeight.w600,
+  ),
+  dayStyle: const TextStyle(fontSize: 14, fontWeight: FontWeight.w600),
+  dayForegroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.disabled)) return AppColors.muted;
+    if (states.contains(WidgetState.selected)) return Colors.white;
+    return AppColors.ink;
+  }),
+  dayBackgroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.selected)) return AppColors.primaryStrong;
+    return null;
+  }),
+  dayOverlayColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.selected)) return Colors.white24;
+    return AppColors.primary.withAlpha(31);
+  }),
+  todayForegroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.disabled)) return AppColors.muted;
+    if (states.contains(WidgetState.selected)) return Colors.white;
+    return AppColors.primaryStrong;
+  }),
+  todayBackgroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.selected)) return AppColors.primaryStrong;
+    return null;
+  }),
+  // 今日始终带描边（选中态由实底承载，未选中态靠 1.5px 描边定位）：
+  // `primaryStrong` 白底 4.49:1，超过非文字元素 3:1 门槛。
+  todayBorder: const BorderSide(color: AppColors.primaryStrong, width: 1.5),
+  yearStyle: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
+  yearForegroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.disabled)) return AppColors.muted;
+    if (states.contains(WidgetState.selected)) return Colors.white;
+    return AppColors.ink;
+  }),
+  yearBackgroundColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.selected)) return AppColors.primaryStrong;
+    return null;
+  }),
+  yearOverlayColor: WidgetStateProperty.resolveWith((states) {
+    if (states.contains(WidgetState.selected)) return Colors.white24;
+    return AppColors.primary.withAlpha(31);
+  }),
+  cancelButtonStyle: TextButton.styleFrom(
+    foregroundColor: AppColors.inkSoft,
+    minimumSize: const Size(64, 44),
+    textStyle: const TextStyle(fontSize: 14, fontWeight: FontWeight.w600),
+  ),
+  confirmButtonStyle: TextButton.styleFrom(
+    foregroundColor: AppColors.primaryStrong,
+    minimumSize: const Size(64, 44),
+    textStyle: const TextStyle(fontSize: 14, fontWeight: FontWeight.w700),
+  ),
+);

lib/core/widgets/app_date_picker.dart

@@ -0,0 +1,144 @@
+/// 日期录入共享层（M3.5-02）。
+///
+/// 根因备忘：全仓 7 处 `showDatePicker` 各写一遍裸调用，用户实测暴露两个问题：
+///
+/// 1. **月份只能靠 `< >` 逐月切**。Flutter 原生日历有年份网格、没有月份网格，
+///    从 9 月回到 4 月要点 5 次箭头。已实际导致误录——用户把当月（2026-09）
+///    的就医记录记成了 2026-04-09，进而误判「本月花费 ¥0」是统计坏了。
+/// 2. **键盘输入模式在英文兜底下不可用**。原生 calendar 模式本就带一枚
+///    切换到手输的铅笔按钮，但未配本地化时按钮 tooltip 是
+///    `Switch to input`、报错是 `Invalid format.`，中文用户看不懂也不敢用。
+///    M3.5-01 挂上 zh-CN delegate 后变成「切换到输入模式」/「格式无效。」/
+///    「超出范围。」，输入框提示也从 `mm/dd/yyyy` 变成中文习惯的
+///    `yyyy/mm/dd`，这条路才真正走通。
+///
+/// 本文件的处置：
+///
+/// - [pickAppDate] 收口 7 处调用：统一 calendar 首屏 + **保留**手输切换
+///   （明确不用 `calendarOnly`——那恰好会砍掉手输这条快路），并把
+///   `initialDate` 夹进 `[firstDate, lastDate]` 防越界断言。各调用点原有的
+///   业务约束（如健康事件 `lastDate: now` 不许未来）由调用方原样传入，不改。
+/// - [AppDateFieldTrailing] 给 7 处日期行统一挂「今天」快捷键：绝大多数录入
+///   就是「记今天的事」，一键落值比开弹窗再找今天更快，也把「月份导航」
+///   这条容易走错的路整段绕开。原生 `showDatePicker` 无法注入自定义动作
+///   （`builder` 只能包裹整个 Dialog，拿不到它的内部选中态），所以快捷键
+///   放在调用方表单行而非弹窗内。
+library;
+
+import 'package:flutter/material.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+
+/// 抹掉时分秒，只留年月日（日期选择器返回值与业务日期字段的统一口径）。
+DateTime dateOnly(DateTime value) =>
+    DateTime(value.year, value.month, value.day);
+
+/// 今天（本地时区，仅日期）。
+DateTime today() => dateOnly(DateTime.now());
+
+/// 判断 [date] 是否落在 `[firstDate, lastDate]` 闭区间内（按日粒度）。
+bool isDateSelectable({
+  required DateTime date,
+  required DateTime firstDate,
+  required DateTime lastDate,
+}) {
+  final day = dateOnly(date);
+  return !day.isBefore(dateOnly(firstDate)) && !day.isAfter(dateOnly(lastDate));
+}
+
+/// 全仓统一的日期选择入口。
+///
+/// [initialDate] 会被夹进 `[firstDate, lastDate]`——调用方常传「当前值 ?? 今天」，
+/// 而部分表单的 `firstDate` 就是今天（如提醒到期日），历史值可能已越界。
+///
+/// 返回 `null` 表示用户取消；返回值已抹掉时分秒。
+Future<DateTime?> pickAppDate({
+  required BuildContext context,
+  required DateTime initialDate,
+  required DateTime firstDate,
+  required DateTime lastDate,
+}) async {
+  final first = dateOnly(firstDate);
+  final last = dateOnly(lastDate);
+  var initial = dateOnly(initialDate);
+  if (initial.isBefore(first)) initial = first;
+  if (initial.isAfter(last)) initial = last;
+
+  final picked = await showDatePicker(
+    context: context,
+    initialDate: initial,
+    firstDate: first,
+    lastDate: last,
+    // calendar 首屏 + 头部铅笔按钮切手输：日期不确定时翻日历，日期已知时
+    // 一行敲完。不用 calendarOnly（砍掉手输）、不用 input 首屏（多数录入
+    // 是「今天/最近几天」，日历一眼可点，手输反而更慢）。
+    initialEntryMode: DatePickerEntryMode.calendar,
+    // 帮助文字/确定/取消/手输提示与格式报错全部交给 zh-CN 本地化
+    // （appLocalizationsDelegates），不在此硬编码中文，避免两处文案漂移。
+  );
+  return picked == null ? null : dateOnly(picked);
+}
+
+/// 日期行尾部（7 处日期 [ListTile] 统一形态）：「今天」快捷键 + 日历图标。
+///
+/// - 「今天」直接把字段落到今天，不开弹窗；今天越界（业务不允许）时按钮
+///   自动隐藏，只留日历图标。
+/// - 触控目标 44×44（项目最小触控口径），文字 `primaryStrong` 白底 4.49:1。
+class AppDateFieldTrailing extends StatelessWidget {
+  const AppDateFieldTrailing({
+    required this.firstDate,
+    required this.lastDate,
+    required this.onToday,
+    super.key,
+    this.enabled = true,
+  });
+
+  /// 业务允许的最早日期（与 [pickAppDate] 同一约束）。
+  final DateTime firstDate;
+
+  /// 业务允许的最晚日期。
+  final DateTime lastDate;
+
+  /// 点「今天」的回调，入参为今天（仅日期）。
+  final ValueChanged<DateTime> onToday;
+
+  /// 表单提交中等禁用态。
+  final bool enabled;
+
+  @override
+  Widget build(BuildContext context) {
+    final now = today();
+    final showToday = isDateSelectable(
+      date: now,
+      firstDate: firstDate,
+      lastDate: lastDate,
+    );
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        if (showToday)
+          Tooltip(
+            message: '设为今天',
+            child: TextButton(
+              onPressed: enabled ? () => onToday(now) : null,
+              style: TextButton.styleFrom(
+                foregroundColor: AppColors.primaryStrong,
+                disabledForegroundColor: AppColors.muted,
+                minimumSize: const Size(44, 44),
+                padding: const EdgeInsets.symmetric(horizontal: 8),
+                textStyle: const TextStyle(
+                  fontSize: 13,
+                  fontWeight: FontWeight.w700,
+                ),
+              ),
+              child: const Text('今天'),
+            ),
+          ),
+        const Icon(
+          Icons.calendar_month_outlined,
+          size: 20,
+          color: AppColors.muted,
+        ),
+      ],
+    );
+  }
+}

lib/core/widgets/avatar_upload_sheet.dart

@@ -0,0 +1,271 @@
+import 'package:flutter/material.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/community_repository.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+
+/// 页面侧的构造口：调用页只知道「用途」，仓库与选图/压缩层的装配由
+/// `app.dart` 在装配处完成。
+///
+/// 缺省为 null 时页面**不渲染头像上传入口**：意为「本次构建未装配上传能力」，
+/// 而不是「有入口但点了没反应」。生产装配恒注入（见 `app.dart`）。
+typedef AvatarUploaderBuilder = MediaUploader Function(MediaPurpose purpose);
+
+/// App 级注入口（沿 `MediaUploaderFactory` 先例：工厂拿到已装配的仓库）。
+///
+/// 生产缺省 [defaultAvatarUploader]；**桌面实测与集成测试**在此替换选图与
+/// 压缩两层——Linux 桌面既无 image_picker 也无 flutter_image_compress 的
+/// 原生实现，而 createUpload / 预签名 PUT 直传 / confirm 三段仍走生产实现。
+typedef AvatarUploaderFactory =
+    MediaUploader Function(
+      CommunityRepository repository,
+      MediaPurpose purpose,
+    );
+
+/// 生产缺省头像上传器：单图、单并发（头像没有批量语义）。
+MediaUploader defaultAvatarUploader(
+  CommunityRepository repository,
+  MediaPurpose purpose,
+) => MediaUploader(
+  repository: repository,
+  purpose: purpose,
+  maxImages: 1,
+  maxConcurrentUploads: 1,
+);
+
+/// 弹出头像上传流程，返回**ready 的 assetId**；用户取消或未走到 ready
+/// 即 null（孤儿防护：未 confirm 的 asset 绝不外露，见 [MediaUploader]）。
+Future<String?> showAvatarUploadSheet(
+  BuildContext context, {
+  required AvatarUploaderBuilder builder,
+  required MediaPurpose purpose,
+  String title = '更换头像',
+}) {
+  return showModalBottomSheet<String>(
+    context: context,
+    useSafeArea: true,
+    isScrollControlled: true,
+    showDragHandle: true,
+    builder: (context) =>
+        AvatarUploadSheet(uploader: builder(purpose), title: title),
+  );
+}
+
+/// 头像上传 sheet：复用发布页的 [MediaUploader] 六态编排（queued /
+/// compressing / uploading / confirming / ready / failed），单图上限。
+///
+/// 与九宫格的差异只在呈现：这里一次只有一张图，故用整幅预览 + 线性进度
+/// 条，而不是格内 [UploadProgressOverlay]；状态机、凭据过期换新、失败可
+/// 重试、孤儿防护全部沿用编排器，本组件不复制任何上传逻辑。
+///
+/// **ready 后仍需用户点「使用这张」**：上传成功不等于用户满意这张图，
+/// 自动关闭会剥夺预览确认的机会（头像是长期可见的身份标识）。
+class AvatarUploadSheet extends StatefulWidget {
+  const AvatarUploadSheet({
+    required this.uploader,
+    required this.title,
+    super.key,
+  });
+
+  /// 本次会话专属的上传器（purpose 与 maxImages=1 由构造口设定）；
+  /// 关闭 sheet 即 dispose，在途请求经 [MediaUploader.reset] 作废。
+  final MediaUploader uploader;
+
+  final String title;
+
+  @override
+  State<AvatarUploadSheet> createState() => _AvatarUploadSheetState();
+}
+
+class _AvatarUploadSheetState extends State<AvatarUploadSheet> {
+  MediaUploader get _uploader => widget.uploader;
+
+  @override
+  void initState() {
+    super.initState();
+    _uploader.addListener(_onChanged);
+    // 打开即拉起选择器：sheet 的唯一目的就是选一张图，多一次「选择图片」
+    // 点击是纯摩擦。用户在系统选择器里取消后回落到空态（可再次选择）。
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (mounted) _uploader.pickAndAdd();
+    });
+  }
+
+  void _onChanged() {
+    if (mounted) setState(() {});
+  }
+
+  @override
+  void dispose() {
+    _uploader.removeListener(_onChanged);
+    // 在途任务按 cancelled 收敛（未 confirm 的服务端 asset 弃引用，
+    // 由服务端超时清理兜底）。
+    _uploader
+      ..reset()
+      ..dispose();
+    super.dispose();
+  }
+
+  Future<void> _reselect() async {
+    // 换图前先清空：maxImages=1 时不清空则 remainingSlots=0，选择器不会拉起。
+    _uploader.reset();
+    await _uploader.pickAndAdd();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final items = _uploader.items;
+    final item = items.isEmpty ? null : items.first;
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(20, 0, 20, 24),
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: [
+          Text(widget.title, style: Theme.of(context).textTheme.titleLarge),
+          const SizedBox(height: 16),
+          if (item != null) _preview(item),
+          if (item != null) const SizedBox(height: 14),
+          ..._body(item),
+        ],
+      ),
+    );
+  }
+
+  /// 预览：原图字节直接解码（不落盘），圆形裁切以贴合头像最终形态。
+  Widget _preview(MediaUploadItem item) {
+    return Center(
+      child: ClipOval(
+        child: Image.memory(
+          item.previewBytes,
+          width: 132,
+          height: 132,
+          fit: BoxFit.cover,
+          errorBuilder: (context, error, stack) => Container(
+            width: 132,
+            height: 132,
+            color: AppColors.surfaceTint,
+            child: const Icon(Icons.image_outlined, color: AppColors.muted),
+          ),
+        ),
+      ),
+    );
+  }
+
+  List<Widget> _body(MediaUploadItem? item) {
+    if (item == null) {
+      // 选择器拉起中 / 用户取消后的空态。
+      return _uploader.isPicking
+          ? const [_BusyLine(label: '正在打开相册…')]
+          : [
+              const Text(
+                '还没有选择图片',
+                textAlign: TextAlign.center,
+                style: TextStyle(color: AppColors.inkSoft, fontSize: 13),
+              ),
+              const SizedBox(height: 14),
+              FilledButton.icon(
+                onPressed: _reselect,
+                icon: const Icon(Icons.photo_library_outlined, size: 18),
+                label: const Text('选择图片'),
+              ),
+            ];
+    }
+    switch (item.phase) {
+      case MediaItemPhase.queued:
+      case MediaItemPhase.compressing:
+        return const [_BusyLine(label: '正在处理图片…')];
+      case MediaItemPhase.uploading:
+        return [
+          _ProgressLine(progress: item.progress),
+          const SizedBox(height: 10),
+          Text(
+            '上传中 ${(item.progress * 100).round()}%',
+            textAlign: TextAlign.center,
+            style: const TextStyle(color: AppColors.inkSoft, fontSize: 13),
+          ),
+        ];
+      case MediaItemPhase.confirming:
+        return const [
+          _ProgressLine(progress: 1),
+          SizedBox(height: 10),
+          Text(
+            '正在确认…',
+            textAlign: TextAlign.center,
+            style: TextStyle(color: AppColors.inkSoft, fontSize: 13),
+          ),
+        ];
+      case MediaItemPhase.ready:
+        return [
+          FilledButton(
+            onPressed: () => Navigator.of(context).pop(item.assetId),
+            child: const Text('使用这张'),
+          ),
+          const SizedBox(height: 8),
+          TextButton(onPressed: _reselect, child: const Text('重新选择')),
+        ];
+      case MediaItemPhase.failed:
+        return [
+          Text(
+            item.errorMessage ?? '上传失败',
+            textAlign: TextAlign.center,
+            style: const TextStyle(color: AppColors.errorDark, fontSize: 13),
+          ),
+          const SizedBox(height: 12),
+          // 不可重试（如压缩后仍超 10 MB）只给「重新选择」——重试同一张
+          // 必然再失败，给重试钮是误导。
+          if (item.retryable)
+            FilledButton(
+              onPressed: () => _uploader.retry(item.localId),
+              child: const Text('重试'),
+            ),
+          if (item.retryable) const SizedBox(height: 8),
+          TextButton(onPressed: _reselect, child: const Text('重新选择')),
+        ];
+    }
+  }
+}
+
+class _BusyLine extends StatelessWidget {
+  const _BusyLine({required this.label});
+
+  final String label;
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        const SizedBox(
+          width: 18,
+          height: 18,
+          child: CircularProgressIndicator(strokeWidth: 2),
+        ),
+        const SizedBox(width: 10),
+        Text(
+          label,
+          style: const TextStyle(color: AppColors.inkSoft, fontSize: 13),
+        ),
+      ],
+    );
+  }
+}
+
+class _ProgressLine extends StatelessWidget {
+  const _ProgressLine({required this.progress});
+
+  final double progress;
+
+  @override
+  Widget build(BuildContext context) {
+    return ClipRRect(
+      borderRadius: const BorderRadius.all(Radius.circular(AppRadius.pill)),
+      child: LinearProgressIndicator(
+        value: progress,
+        minHeight: 6,
+        backgroundColor: AppColors.surfaceTint,
+        color: AppColors.primary,
+      ),
+    );
+  }
+}

lib/core/widgets/comment_tile.dart

@@ -0,0 +1,141 @@
+import 'package:flutter/material.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
+import 'package:patbond_flutter/features/community/community_display.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+
+/// 评论条目（05 号规范 §3.4，demo 气泡形态升共享）：
+/// `PetAvatar sm32` + 10 + 气泡（`surface` 底、`border` 1px、圆角 16、
+/// padding 12）——作者名 13/w700 → 4 → 内容 bodyMedium → 6 → 底行
+/// （时间 11 `inkSoft` + 仅本人评论的「删除」入口）。
+///
+/// - @ 回复（单层平铺，契约 replyToUser）以「回复 @昵称：」前缀呈现；
+///   降级作者统一「宠友」占位（isDegraded 一个判定口）。
+/// - [onDelete] 非 null 才渲染删除入口——**权限判定在调用方**（17 号
+///   后端语义：仅评论作者可删，他人可见评论 403/40301）；[deleting]
+///   期间入口替换为 14 转圈防重复提交。
+/// - 评论点赞（§3.4 底行右端）无契约端点，M3 不渲染。
+class CommentTile extends StatelessWidget {
+  const CommentTile({
+    required this.comment,
+    super.key,
+    this.onDelete,
+    this.deleting = false,
+    this.now,
+  });
+
+  final PostComment comment;
+
+  /// 删除回调；null = 非本人评论，不渲染删除入口。
+  final VoidCallback? onDelete;
+
+  /// 删除请求在途（入口转圈锁定）。
+  final bool deleting;
+
+  /// 相对时间的参考时钟（测试注入；缺省取当前时间）。
+  final DateTime? now;
+
+  @override
+  Widget build(BuildContext context) {
+    final replyTo = comment.replyToUser;
+    return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        PetAvatar(size: PetAvatarSize.sm, url: comment.author.avatarUrl),
+        const SizedBox(width: 10),
+        Expanded(
+          child: Container(
+            padding: const EdgeInsets.all(12),
+            decoration: BoxDecoration(
+              color: AppColors.surface,
+              border: Border.all(color: AppColors.border),
+              borderRadius: BorderRadius.circular(16),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  authorDisplayName(comment.author),
+                  style: const TextStyle(
+                    color: AppColors.ink,
+                    fontSize: 13,
+                    fontWeight: FontWeight.w700,
+                  ),
+                ),
+                const SizedBox(height: 4),
+                Text.rich(
+                  TextSpan(
+                    children: [
+                      if (replyTo != null)
+                        TextSpan(
+                          text: '回复 @${authorDisplayName(replyTo)}：',
+                          style: const TextStyle(
+                            color: AppColors.inkSoft,
+                            fontWeight: FontWeight.w600,
+                          ),
+                        ),
+                      TextSpan(text: comment.content),
+                    ],
+                  ),
+                  style: Theme.of(context).textTheme.bodyMedium,
+                ),
+                const SizedBox(height: 6),
+                Row(
+                  children: [
+                    Text(
+                      feedRelativeTime(comment.createdAt, now: now),
+                      style: const TextStyle(
+                        color: AppColors.inkSoft,
+                        fontSize: 11,
+                      ),
+                    ),
+                    const Spacer(),
+                    if (onDelete != null)
+                      deleting
+                          ? const Padding(
+                              padding: EdgeInsets.all(4),
+                              child: SizedBox(
+                                width: 14,
+                                height: 14,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                  color: AppColors.inkSoft,
+                                ),
+                              ),
+                            )
+                          : Semantics(
+                              label: '删除评论',
+                              button: true,
+                              child: InkWell(
+                                onTap: onDelete,
+                                borderRadius: BorderRadius.circular(
+                                  AppRadius.pill,
+                                ),
+                                // 视觉 11 字，触控由 padding 撑到 ≥32
+                                //（气泡内行高受限，不足 44 以热区扩展补偿）。
+                                child: const Padding(
+                                  padding: EdgeInsets.symmetric(
+                                    horizontal: 10,
+                                    vertical: 8,
+                                  ),
+                                  child: Text(
+                                    '删除',
+                                    style: TextStyle(
+                                      color: AppColors.inkSoft,
+                                      fontSize: 11,
+                                      fontWeight: FontWeight.w600,
+                                    ),
+                                  ),
+                                ),
+                              ),
+                            ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/core/widgets/like_button.dart

@@ -31,12 +31,21 @@ enum LikeButtonVariant {
   final Color activeCountColor;
 }
 
-/// 点赞/收藏交互钮（05 号规范 §3.5 静态规格）：图标 20 + 计数 13/w600，
+/// 点赞/收藏交互钮（05 号规范 §3.5）：图标 20 + 计数 13/w600，未激活
-/// 未激活一律 `inkSoft`（6.59:1）。触控 44×44 由 padding 撑足。
+/// 一律 `inkSoft`（6.59:1）。触控 44×44 由 padding 撑足。
 ///
-/// T3-14 只做展示（[onPressed] 传 null 即禁用态，仍按正常色渲染计数与
+/// 乐观更新视觉（§3.5/§4 三层闪烁抑制的 UI 半边，状态本体由持有方经
-/// 状态）；乐观更新动画与 ToggleSync 接线属 T3-15/16。
+/// ToggleSync 驱动）：
-class LikeButton extends StatelessWidget {
+///
+/// - **点按驱动**的状态变化：激活播 240ms 弹性缩放（1→1.25→1）+ 图标
+///   120ms 淡入；取消仅 120ms 颜色渐出、无缩放。
+/// - **非点按驱动**的状态变化（失败回滚 / 服务端对账）：零动画直接跳变；
+///   若激活动画未播完，等播完再跳（避免动画中途反转的抖动，§4.3a）。
+/// - 计数变化一律直接替换，不做滚动动画（回滚时无二次滚动）。
+/// - 系统「减弱动态效果」开启时全部降级为瞬变。
+///
+/// [onPressed] 传 null 即纯展示禁用态（仍按正常色渲染计数与状态）。
+class LikeButton extends StatefulWidget {
   const LikeButton({
     required this.variant,
     required this.active,
@@ -52,15 +61,106 @@ class LikeButton extends StatelessWidget {
   final VoidCallback? onPressed;
   final String? semanticLabel;
 
+  @override
+  State<LikeButton> createState() => _LikeButtonState();
+}
+
+class _LikeButtonState extends State<LikeButton>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _scaleController = AnimationController(
+    vsync: this,
+    duration: const Duration(milliseconds: 240),
+  );
+  late final Animation<double> _scale = TweenSequence<double>([
+    TweenSequenceItem(
+      tween: Tween<double>(
+        begin: 1,
+        end: 1.25,
+      ).chain(CurveTween(curve: Curves.easeOut)),
+      weight: 40,
+    ),
+    TweenSequenceItem(
+      tween: Tween<double>(
+        begin: 1.25,
+        end: 1,
+      ).chain(CurveTween(curve: Curves.easeOutBack)),
+      weight: 60,
+    ),
+  ]).animate(_scaleController);
+
+  /// 当前展示态（回滚等待动画播完期间可短暂落后于 widget.active）。
+  late bool _displayActive = widget.active;
+
+  /// 展示计数与状态成对更新（§4.3c：回滚不出现「心已灭计数未减」中间帧）。
+  late int _displayCount = widget.count;
+
+  /// 最近一次点按的期望目标态；didUpdateWidget 以此区分「点按驱动」
+  /// （播动画）与「回滚/对账」（零动画跳变）。
+  bool? _expectedTarget;
+
+  /// 图标切换是否走 120ms 淡入淡出（点按驱动）；回滚跳变置 false。
+  bool _fadeSwap = false;
+
+  bool get _reduceMotion =>
+      MediaQuery.maybeOf(context)?.disableAnimations ?? false;
+
+  @override
+  void didUpdateWidget(LikeButton oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.active == widget.active) {
+      // 状态未变的计数变化 = 服务端对账：静默替换、不播动画（§4.4）。
+      _displayCount = widget.count;
+      return;
+    }
+    final tapDriven = _expectedTarget == widget.active;
+    _expectedTarget = null;
+    if (tapDriven && !_reduceMotion) {
+      _fadeSwap = true;
+      _displayActive = widget.active;
+      _displayCount = widget.count;
+      if (widget.active) _scaleController.forward(from: 0);
+      return;
+    }
+    // 回滚 / 对账：零动画、计数与状态成对跳变。激活动画未播完则等
+    // 播完再跳（§4.3a，避免动画中途反转的抖动）。
+    _fadeSwap = false;
+    if (_scaleController.isAnimating) {
+      _scaleController.forward().whenComplete(() {
+        if (mounted) {
+          setState(() {
+            _displayActive = widget.active;
+            _displayCount = widget.count;
+          });
+        }
+      });
+    } else {
+      _displayActive = widget.active;
+      _displayCount = widget.count;
+    }
+  }
+
+  void _handleTap() {
+    _expectedTarget = !widget.active;
+    widget.onPressed!();
+  }
+
+  @override
+  void dispose() {
+    _scaleController.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
+    final variant = widget.variant;
+    final active = _displayActive;
     final iconColor = active ? variant.activeIconColor : AppColors.inkSoft;
     final countColor = active ? variant.activeCountColor : AppColors.inkSoft;
     return Semantics(
-      label: semanticLabel,
+      label: widget.semanticLabel,
-      button: onPressed != null,
+      button: widget.onPressed != null,
       child: InkWell(
-        onTap: onPressed,
+        onTap: widget.onPressed == null ? null : _handleTap,
         borderRadius: BorderRadius.circular(AppRadius.pill),
         child: ConstrainedBox(
           constraints: const BoxConstraints(minWidth: 44, minHeight: 44),
@@ -69,14 +169,24 @@ class LikeButton extends StatelessWidget {
             child: Row(
               mainAxisSize: MainAxisSize.min,
               children: [
-                Icon(
+                ScaleTransition(
-                  active ? variant.activeIcon : variant.inactiveIcon,
+                  scale: _scale,
-                  size: 20,
+                  child: AnimatedSwitcher(
-                  color: iconColor,
+                    duration: _fadeSwap
+                        ? const Duration(milliseconds: 120)
+                        : Duration.zero,
+                    child: Icon(
+                      active ? variant.activeIcon : variant.inactiveIcon,
+                      key: ValueKey(active),
+                      size: 20,
+                      color: iconColor,
+                    ),
+                  ),
                 ),
                 const SizedBox(width: 4),
+                // 计数直接替换（§3.5：不做滚动动画，避免回滚二次滚动）。
                 Text(
-                  '$count',
+                  '$_displayCount',
                   style: TextStyle(
                     color: countColor,
                     fontSize: 13,

lib/core/widgets/pet_avatar.dart

@@ -28,9 +28,12 @@ enum PetAvatarSize {
 /// 头像实现。圆形裁切 + 3px `surface` 白描边 + 轻投影（正典
 /// `.patbond-avatar` 规格），可选右下编辑徽标与品牌渐变环。
 ///
-/// M2 首版不做头像上传（ADR-010 / D2-1 裁决），[url] 为 null 时渲染
+/// M2 首版不做头像上传（ADR-010 / D2-1 裁决）；T3.5-09 起 [url] 由服务端
-/// 本地占位形态（`surfaceTint` 底 + `Icons.pets`）；有图时经
+/// `Pet.avatarUrl`（预签名 GET）驱动，[url] 为 null 时仍渲染本地占位形态
-/// [RemoteImage] 加载（loading / 失败兜底由其内置）。
+/// （`surfaceTint` 底 + `Icons.pets`）——签一个必然 404 的 URL 比返回 null
+/// 更糟，故服务端对非 ready 的 asset 直接给 null，客户端只有一种占位逻辑。
+/// 有图时经 [RemoteImage] 加载（缓存 key 已剥签名参数；loading / 失败兜底
+/// 由其内置）。
 class PetAvatar extends StatelessWidget {
   const PetAvatar({
     required this.size,
@@ -45,7 +48,7 @@ class PetAvatar extends StatelessWidget {
 
   final PetAvatarSize size;
 
-  /// 头像图 URL；null 为本地占位形态（M2 默认）。
+  /// 头像图 URL；null 为本地占位形态（无头像 / asset 非 ready / 存储未配置）。
   final String? url;
 
   /// 可点击时整体 [InkWell] 圆形 ripple。

lib/core/widgets/post_media_grid.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/upload_progress_overlay.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
 import 'package:patbond_flutter/widgets/common.dart';
 
 /// 图片九宫格展示态（05 号规范 §3.2）。
@@ -14,7 +16,8 @@ import 'package:patbond_flutter/widgets/common.dart';
 ///   [urls] 单元素而 [totalCount] > 1 时渲染 4:3 单格 + 右下「+N」角标
 ///   胶囊（同 80% scrim 精算）。
 ///
-/// 编辑态（「＋」格 / 删除角标）随发布页工单（T3-17）扩展。
+/// 编辑态（「＋」格 / 删除角标 / 进度覆盖层）见同文件 [PostMediaEditGrid]
+/// （T3-17 发布页选图区）。
 class PostMediaGrid extends StatelessWidget {
   const PostMediaGrid({
     required this.urls,
@@ -106,6 +109,206 @@ class PostMediaGrid extends StatelessWidget {
   }
 }
 
+/// 编辑态九宫格（05 号规范 §3.2 编辑态；T3-17 发布页选图区）。
+///
+/// 与展示态 [PostMediaGrid] 同文件成组，但**独立成类**：展示态以
+/// 「至少一张图 + URL 列表」为前提（构造断言），编辑态的常态却是
+/// 「零张图 + 一个『＋』格」，共用一个构造签名只会让两边都别扭。
+///
+/// - 固定 3 列（九宫格语义），格间距 4、圆角 `sm`(12)、1:1 `cover`;
+///   缩略图直接渲染选图原始字节（[MediaUploadItem.previewBytes]，
+///   不落磁盘、不走网络；解码失败回落 surfaceTint 块 + pets 图标）。
+/// - 每格叠 [UploadProgressOverlay]（六态映射四视觉态）；可重试失败格
+///   整格点按重试，终态失败不给重试通栏。
+/// - 删除角标：右上 22 圆 `ink` 80% 实底 + 白 close 14，触控热区 32。
+/// - 「＋」格：虚线 1.5px 圆角 12 + `add_photo_alternate_outlined` 24
+///   `inkSoft`；[canAdd] 为 false（满 9 张）时隐藏。
+/// - 长按拖拽排序未做（05 §6 D9 可选项）：删格即整组重排，position 由
+///   [MediaUploader.buildAttachRequests] 按当前列表序重发号。
+class PostMediaEditGrid extends StatelessWidget {
+  const PostMediaEditGrid({
+    required this.items,
+    super.key,
+    this.canAdd = true,
+    this.onAdd,
+    this.onRemove,
+    this.onRetry,
+  });
+
+  /// 当前上传项快照（顺序 = position 语义）。
+  final List<MediaUploadItem> items;
+
+  /// 是否渲染「＋」格（剩余槽位 > 0）。
+  final bool canAdd;
+
+  final VoidCallback? onAdd;
+
+  /// 删格回调，参数为 [MediaUploadItem.localId]。
+  final ValueChanged<int>? onRemove;
+
+  /// 重试回调（仅可重试失败格触发），参数为 localId。
+  final ValueChanged<int>? onRetry;
+
+  static const _spacing = 4.0;
+  static const _columns = 3;
+
+  @override
+  Widget build(BuildContext context) {
+    final cellCount = items.length + (canAdd ? 1 : 0);
+    if (cellCount == 0) return const SizedBox.shrink();
+    return GridView.builder(
+      shrinkWrap: true,
+      physics: const NeverScrollableScrollPhysics(),
+      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+        crossAxisCount: _columns,
+        mainAxisSpacing: _spacing,
+        crossAxisSpacing: _spacing,
+      ),
+      itemCount: cellCount,
+      itemBuilder: (context, index) {
+        if (index == items.length) return _AddCell(onTap: onAdd);
+        return _EditCell(
+          item: items[index],
+          onRemove: onRemove == null
+              ? null
+              : () => onRemove!(items[index].localId),
+          onRetry: onRetry == null || !items[index].retryable
+              ? null
+              : () => onRetry!(items[index].localId),
+        );
+      },
+    );
+  }
+}
+
+class _EditCell extends StatelessWidget {
+  const _EditCell({required this.item, this.onRemove, this.onRetry});
+
+  final MediaUploadItem item;
+  final VoidCallback? onRemove;
+  final VoidCallback? onRetry;
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      fit: StackFit.expand,
+      children: [
+        ClipRRect(
+          borderRadius: BorderRadius.circular(AppRadius.sm),
+          child: Image.memory(
+            item.previewBytes,
+            fit: BoxFit.cover,
+            gaplessPlayback: true,
+            // 选图字节无法解码时的兜底（RemoteImage 同款形态）。
+            errorBuilder: (context, _, _) => const ColoredBox(
+              color: AppColors.surfaceTint,
+              child: Center(
+                child: Icon(Icons.pets, color: AppColors.muted, size: 20),
+              ),
+            ),
+          ),
+        ),
+        ClipRRect(
+          borderRadius: BorderRadius.circular(AppRadius.sm),
+          child: UploadProgressOverlay(
+            phase: item.phase,
+            progress: item.progress,
+            onRetry: onRetry,
+          ),
+        ),
+        Positioned(
+          right: 0,
+          top: 0,
+          child: GestureDetector(
+            onTap: onRemove,
+            behavior: HitTestBehavior.opaque,
+            child: const Padding(
+              // 22 圆角标 + padding 撑到 32 触控热区。
+              padding: EdgeInsets.all(5),
+              child: DecoratedBox(
+                decoration: BoxDecoration(
+                  shape: BoxShape.circle,
+                  color: Color(0xCC3E2A1F),
+                ),
+                child: SizedBox(
+                  width: 22,
+                  height: 22,
+                  child: Center(
+                    child: Icon(Icons.close, size: 14, color: Colors.white),
+                  ),
+                ),
+              ),
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _AddCell extends StatelessWidget {
+  const _AddCell({this.onTap});
+
+  final VoidCallback? onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return InkWell(
+      onTap: onTap,
+      borderRadius: BorderRadius.circular(AppRadius.sm),
+      child: CustomPaint(
+        painter: const _DashedBorderPainter(),
+        child: const Center(
+          child: Icon(
+            Icons.add_photo_alternate_outlined,
+            size: 24,
+            color: AppColors.inkSoft,
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+/// 「＋」格的虚线圆角边框（Flutter 无内置虚线边框，按规范 1.5px 自绘）。
+class _DashedBorderPainter extends CustomPainter {
+  const _DashedBorderPainter();
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final paint = Paint()
+      ..color = AppColors.border
+      ..strokeWidth = 1.5
+      ..style = PaintingStyle.stroke;
+    final path = Path()
+      ..addRRect(
+        RRect.fromRectAndRadius(
+          Offset.zero & size,
+          const Radius.circular(AppRadius.sm),
+        ),
+      );
+    const dash = 5.0;
+    const gap = 4.0;
+    for (final metric in path.computeMetrics()) {
+      var distance = 0.0;
+      while (distance < metric.length) {
+        final next = distance + dash;
+        canvas.drawPath(
+          metric.extractPath(
+            distance,
+            next > metric.length ? metric.length : next,
+          ),
+          paint,
+        );
+        distance = next + gap;
+      }
+    }
+  }
+
+  @override
+  bool shouldRepaint(_DashedBorderPainter oldDelegate) => false;
+}
+
 /// 单图折叠形态：4:3 圆角封面 + 右下「+N」胶囊角标。
 class _CollapsedCover extends StatelessWidget {
   const _CollapsedCover({

lib/features/auth/auth_models.dart

@@ -1,4 +1,10 @@
 /// 认证接口的响应模型（接口契约冻结稿，字段名与后端一致）。
+library;
+
+import 'package:patbond_flutter/core/models/patch_field.dart';
+
+export 'package:patbond_flutter/core/models/patch_field.dart';
+
 class AuthTokens {
   const AuthTokens({
     required this.userId,
@@ -32,11 +38,16 @@ class AuthTokens {
   final DateTime refreshTokenExpiresAt;
 }
 
-/// `GET /api/v1/me` 的用户资料。
+/// `GET` / `PATCH /api/v1/me` 的用户资料（契约 v1.4.0 恰好这 6 个字段）。
+///
+/// **不含 `avatarAssetId`**：客户端对头像 asset 只写不读，「有头像」等价于
+/// [avatarUrl] 非 null。
 class UserProfile {
   const UserProfile({
     required this.userId,
     required this.username,
+    required this.nickname,
+    required this.avatarUrl,
     required this.phone,
     required this.createdAt,
   });
@@ -45,6 +56,11 @@ class UserProfile {
     return UserProfile(
       userId: json['userId'] as String,
       username: json['username'] as String,
+      // DB 原值：服务端**刻意不做 username 回退**（v1.4.0 定型，理由见
+      // [displayName]），未设置即 null。
+      nickname: json['nickname'] as String?,
+      // 时效性预签名 GET URL，每次响应现签；不得持久化、过期即重取。
+      avatarUrl: json['avatarUrl'] as String?,
       // 服务端可返回 null（历史数据或未来第三方注册），不得非空强转。
       phone: json['phone'] as String?,
       createdAt: DateTime.parse(json['createdAt'] as String),
@@ -53,6 +69,57 @@ class UserProfile {
 
   final String userId;
   final String username;
+
+  /// 昵称 DB 原值，未设置为 null。**编辑态预填只能用它**，不能用
+  /// [displayName]——否则保存时会把展示回退值固化成真实昵称。
+  final String? nickname;
+
+  /// 头像预签名 GET URL（会过期，禁止入本地存储）；无头像 / asset 非
+  /// ready / 对象存储未配置三种情况均为 null。
+  final String? avatarUrl;
+
   final String? phone;
   final DateTime createdAt;
+
+  /// 本人视角的展示名：`nickname ?? username`。
+  ///
+  /// **回退刻意做在客户端展示层**：服务端 `/me` 返回 DB 原值不回退（契约
+  /// v1.4.0 §Me），因为 `/me` 是本人编辑态——若服务端回退，编辑页会把
+  /// `llx` 预填进昵称框，用户误以为设过昵称，下次保存即把这个展示约定
+  /// **固化成真实数据**，`/internal/users/profiles` 的 SQL 回退链从此再不
+  /// 触发。他人视角（Feed 作者名）的回退由服务端 SQL 层承担，客户端不重复。
+  String get displayName => nickname ?? username;
+
+  /// 是否已有头像（响应不回显 avatarAssetId，判定只看 URL 是否现签成功）。
+  bool get hasAvatar => avatarUrl != null;
+}
+
+/// `PATCH /api/v1/me` 请求体（契约 v1.4.0，**三态语义**：
+/// 键缺省 = 不改 / 显式 `null` = 清空 / 给值 = 设置）。
+///
+/// 两字段都 absent 即**空 patch**——服务端答 400/40000 而非静默 200，
+/// 故调用前应以 [isEmpty] 短路（无变更不发请求）。
+///
+/// 昵称的服务端校验：btrim 后长度按**码点**计 1~32；纯空白或空串是
+/// 400/40000 而**不是**隐式清空（清空只走 [PatchField.clear] 一条路）。
+class UpdateMeRequest {
+  const UpdateMeRequest({
+    this.nickname = const PatchField<String>.absent(),
+    this.avatarAssetId = const PatchField<String>.absent(),
+  });
+
+  final PatchField<String> nickname;
+
+  /// 头像 asset（两步上传产物，`purpose` 须为 `user_avatar`）。
+  final PatchField<String> avatarAssetId;
+
+  /// 本次 patch 未触及任何字段（发出去必得 400/40000）。
+  bool get isEmpty => !nickname.isPresent && !avatarAssetId.isPresent;
+
+  Map<String, Object?> toJson() {
+    final json = <String, Object?>{};
+    nickname.writeTo(json, 'nickname');
+    avatarAssetId.writeTo(json, 'avatarAssetId');
+    return json;
+  }
 }

lib/features/auth/auth_repository.dart

@@ -28,18 +28,33 @@ abstract class AuthRepository {
   Future<SessionRestoreResult> restoreSession();
 
   Future<UserProfile> me();
+
+  /// 本人资料部分更新（昵称 / 头像，三态语义见 [UpdateMeRequest]）。
+  /// 成功返回**更新后的全量 [UserProfile]**（服务端回显，含现签 avatarUrl）。
+  Future<UserProfile> updateMe(UpdateMeRequest request);
 }
 
+/// 基于 [ApiClient] 的实现。
+///
+/// **端口线路**（ADR-002 无网关，分端口直连）：注册/登录/登出/刷新走 auth
+/// 服务（:8081）；`GET` 与 `PATCH /api/v1/me` 由 **user 服务**（:8082
+/// `MeController`）提供，故经 [userApi] 直连——auth 上没有 `/api/v1/me`
+/// 路由，走主客户端会得到 404。未提供 [userApi] 时回落主客户端（既有测试
+/// 桩场景）。同一线路分离手法与 `ApiCommunityRepository` 的 `mediaApi` 一致。
 class ApiAuthRepository implements AuthRepository {
   ApiAuthRepository({
-    required this._api,
+    required ApiClient api,
     required this._session,
     required this._refresher,
+    ApiClient? userApi,
     this._analytics,
     this._uuid = const Uuid(),
-  });
+  }) : _api = api,
+       // 缺省回落主客户端：既有测试桩只注入一个 ApiClient。
+       _userApi = userApi ?? api;
 
   final ApiClient _api;
+  final ApiClient _userApi;
   final SessionManager _session;
   final TokenRefresher _refresher;
   final AnalyticsService? _analytics;
@@ -132,11 +147,25 @@ class ApiAuthRepository implements AuthRepository {
 
   @override
   Future<UserProfile> me() async {
-    final data = await _api.request(
+    final data = await _userApi.request(
       '/api/v1/me',
       method: 'GET',
       requiresAuth: true,
     );
     return UserProfile.fromJson(data! as Map<String, dynamic>);
   }
+
+  @override
+  Future<UserProfile> updateMe(UpdateMeRequest request) async {
+    // 无乐观锁、无幂等键（契约定型：唯一合法写者 + 列级选择性 UPDATE，
+    // 同 body 重放天然幂等）。三态由 request.toJson 表达——「不改」的字段
+    // 根本不出现在 body 里，绝不发成 null。
+    final data = await _userApi.request(
+      '/api/v1/me',
+      method: 'PATCH',
+      body: request.toJson(),
+      requiresAuth: true,
+    );
+    return UserProfile.fromJson(data! as Map<String, dynamic>);
+  }
 }

lib/features/community/community_controller.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
 import 'package:patbond_flutter/features/community/community_models.dart';
 import 'package:patbond_flutter/features/community/community_repository.dart';
 import 'package:patbond_flutter/features/community/toggle_sync.dart';
@@ -18,7 +19,7 @@ enum LoadMorePhase { idle, loading, error }
 /// 评论列表只属详情页，按「页面级状态按页自建」纪律经 [repository]
 /// 自取，不膨胀本控制器。服务端是唯一事实来源，内存副本仅作展示缓存。
 class CommunityController extends ChangeNotifier {
-  CommunityController({required this._repository}) {
+  CommunityController({required this._repository, this._interactionAnalytics}) {
     _likeSync = ToggleSync(
       read: (id) {
         final post = _postCache[id];
@@ -35,6 +36,11 @@ class CommunityController extends ChangeNotifier {
         final state = target
             ? await _repository.likePost(id)
             : await _repository.unlikePost(id);
+        // 成功响应后上报（06 §1.4 口径；乐观翻转与失败均不报）。
+        final source = _likeSources[id] ?? InteractionSource.feed;
+        target
+            ? _interactionAnalytics?.postLiked(source: source)
+            : _interactionAnalytics?.postUnliked(source: source);
         return ToggleOutcome(active: state.liked, count: state.likeCount);
       },
       generation: () => _generation,
@@ -62,6 +68,10 @@ class CommunityController extends ChangeNotifier {
         final state = target
             ? await _repository.bookmarkPost(id)
             : await _repository.unbookmarkPost(id);
+        final source = _bookmarkSources[id] ?? InteractionSource.feed;
+        target
+            ? _interactionAnalytics?.postFavorited(source: source)
+            : _interactionAnalytics?.postUnfavorited(source: source);
         return ToggleOutcome(
           active: state.bookmarked,
           count: state.bookmarkCount,
@@ -73,6 +83,12 @@ class CommunityController extends ChangeNotifier {
   }
 
   final CommunityRepository _repository;
+  final CommunityInteractionAnalytics? _interactionAnalytics;
+
+  /// 各帖最近一次 toggle 的触点来源（Feed 卡片 / 详情页共享同一实例，
+  /// 成功响应上报时按发起触点归因）。
+  final Map<String, InteractionSource> _likeSources = {};
+  final Map<String, InteractionSource> _bookmarkSources = {};
 
   /// 页面级状态（评论列表、我的帖子、收藏页等）按页直接经仓库取数。
   CommunityRepository get repository => _repository;
@@ -193,10 +209,34 @@ class CommunityController extends ChangeNotifier {
   }
 
   /// 点赞/取消点赞（乐观翻转，终态由 [ToggleSync] 对账收敛，不外抛）。
-  void toggleLike(String postId) => _likeSync.toggle(postId);
+  /// [source] 为触点来源（埋点归因），Feed 卡片缺省 feed、详情页传
+  /// post_detail。
+  void toggleLike(
+    String postId, {
+    InteractionSource source = InteractionSource.feed,
+  }) {
+    _likeSources[postId] = source;
+    _likeSync.toggle(postId);
+  }
 
   /// 收藏/取消收藏（与点赞同构）。
-  void toggleBookmark(String postId) => _bookmarkSync.toggle(postId);
+  void toggleBookmark(
+    String postId, {
+    InteractionSource source = InteractionSource.feed,
+  }) {
+    _bookmarkSources[postId] = source;
+    _bookmarkSync.toggle(postId);
+  }
+
+  /// 评论创建/删除后的计数调整（详情页与 Feed 卡片同源写入，
+  /// 服务端 comment_count 由写侧同事务维护，本地只做展示对齐）。
+  void adjustCommentCount(String postId, int delta) {
+    final current =
+        _postCache[postId]?.commentCount ?? _cardOrNull(postId)?.commentCount;
+    if (current == null) return;
+    final next = current + delta;
+    _writeInteraction(postId, commentCount: next < 0 ? 0 : next);
+  }
 
   /// 消费一次性 toggle 错误（SnackBar 展示后清除）。
   void clearToggleError() => _toggleError = null;
@@ -215,6 +255,8 @@ class CommunityController extends ChangeNotifier {
     _loadMoreError = null;
     _toggleError = null;
     _postCache.clear();
+    _likeSources.clear();
+    _bookmarkSources.clear();
     _likeSync.reset();
     _bookmarkSync.reset();
     _notify();
@@ -234,6 +276,7 @@ class CommunityController extends ChangeNotifier {
     int? likeCount,
     bool? bookmarkedByMe,
     int? bookmarkCount,
+    int? commentCount,
   }) {
     final post = _postCache[postId];
     if (post != null) {
@@ -242,6 +285,7 @@ class CommunityController extends ChangeNotifier {
         likeCount: likeCount,
         bookmarkedByMe: bookmarkedByMe,
         bookmarkCount: bookmarkCount,
+        commentCount: commentCount,
       );
     }
     final index = _feed.indexWhere((card) => card.id == postId);
@@ -252,6 +296,7 @@ class CommunityController extends ChangeNotifier {
           likeCount: likeCount,
           bookmarkedByMe: bookmarkedByMe,
           bookmarkCount: bookmarkCount,
+          commentCount: commentCount,
         );
     }
     if (post != null || index != -1) _notify();

lib/features/community/community_display.dart

@@ -1,4 +1,5 @@
 import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
 import 'package:patbond_flutter/features/community/community_models.dart';
 
 /// 降级作者（[AuthorSummary.isDegraded]，资料暂不可得或已注销）的
@@ -31,3 +32,28 @@ String feedLoadErrorMessage(ApiException? error) => switch (error) {
   ApiRateLimitException _ => '请求过于频繁，请稍后再试',
   _ => '动态加载失败，请稍后重试',
 };
+
+/// 发布失败的用户话术（T3-17，三条关键语义各自可辨；服务端原始
+/// message 不上屏）：
+///
+/// - 40905 同键异 payload：提交标识已被页面重置，再点一次即可;
+/// - 42203 asset 未 ready：等图片传完再发;
+/// - 网络失败：可重试（同键重放，服务端不会重复建帖）。
+String postPublishErrorMessage(ApiException? error) => switch (error) {
+  IdempotencyMismatchException _ => '提交内容与上次重试不一致，已重置提交标识，请再点一次「发布」',
+  MediaNotReadyException _ => '有图片还没上传完成，请等图片就绪后再发布',
+  PostNotFoundException _ => '草稿已不存在（可能已在别处删除），请重新发布',
+  PostVersionConflictException _ => '草稿在别处被修改过，请重试发布',
+  ApiNetworkException _ => '网络异常，请检查网络后重试',
+  ApiRateLimitException _ => '请求过于频繁，请稍后再试',
+  ApiBusinessException(:final code) when code == ApiCodes.paramError =>
+    '内容不符合发布要求，请修改后重试',
+  _ => '发布失败，请稍后重试',
+};
+
+/// 草稿保存失败的用户话术（发布页 SnackBar）。
+String draftSaveErrorMessage(ApiException? error) => switch (error) {
+  ApiNetworkException _ => '网络异常，草稿未保存，请重试',
+  ApiRateLimitException _ => '请求过于频繁，请稍后再试',
+  _ => '草稿保存失败，请重试',
+};

lib/features/community/community_interaction_analytics.dart

@@ -0,0 +1,137 @@
+import 'package:patbond_flutter/analytics/page_view_tracker.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+
+/// 互动域埋点强类型封装（06 号规划 §1.4 字典 v3 互动八事件；后端白名单
+/// 已随 api dev@8089c06 就绪，22 号报告 §1）。沿 pet/feed 域惯例：枚举
+/// 编译期锁死，业务代码禁止手拼事件名与属性；只记行为不记内容
+/// （隐私红线：postId/commentId 等内容 ID 一律不进 props）。
+///
+/// 点赞/收藏/关注**不埋失败**（06 §1.4 取舍：幂等写入单点交互，失败率
+/// 靠服务端错误率观测）；`comment_create_started` 被字典锁死 unknown，
+/// 不得上报（22 号 §1 末段）。
+
+/// 互动触点来源（06 §1.4 source 枚举）。M3 接 feed / post_detail；
+/// user_profile / follow_list 随后续页面启用。
+enum InteractionSource {
+  feed('feed'),
+  postDetail('post_detail'),
+  userProfile('user_profile'),
+  followList('follow_list');
+
+  const InteractionSource(this.value);
+
+  final String value;
+}
+
+/// 评论创建失败原因（06 §1.4 失败枚举基底）。网络归并口径同 pet/feed 域：
+/// 断网/超时/5xx 均并入 network_error，server_error 保留兜底。
+enum CommentCreateFailureReason {
+  validationError('validation_error'),
+  notFound('not_found'),
+  rateLimited('rate_limited'),
+  networkError('network_error'),
+  serverError('server_error');
+
+  const CommentCreateFailureReason(this.value);
+
+  final String value;
+}
+
+/// 类型化异常 → 评论失败原因；会话失效返回 null（应用即将回登录页，
+/// 不作为评论失败上报，feed 域同款口径）。
+CommentCreateFailureReason? commentCreateFailureReasonOf(ApiException error) =>
+    switch (error) {
+      ApiNetworkException _ => CommentCreateFailureReason.networkError,
+      ApiRateLimitException _ => CommentCreateFailureReason.rateLimited,
+      SessionExpiredException _ => null,
+      ApiBusinessException(:final code) => switch (code) {
+        ApiCodes.paramError => CommentCreateFailureReason.validationError,
+        ApiCodes.postNotFound ||
+        ApiCodes.commentNotFound ||
+        ApiCodes.communityUserNotFound => CommentCreateFailureReason.notFound,
+        _ => CommentCreateFailureReason.serverError,
+      },
+    };
+
+/// 正文规模分桶（06 §1.3 隐私红线 1：不报精确字数）。
+/// empty / short(≤50) / medium(51–500) / long(>500)。
+String textLengthBucketOf(int length) {
+  if (length <= 0) return 'empty';
+  if (length <= 50) return 'short';
+  if (length <= 500) return 'medium';
+  return 'long';
+}
+
+class CommunityInteractionAnalytics {
+  CommunityInteractionAnalytics(this._track);
+
+  /// 生产传 `AnalyticsService.trackEvent`，测试传录制桩。
+  final TrackEventFn _track;
+
+  /// 点赞成功响应后（乐观翻转本身不报；单飞合并链每个实际抵达服务端
+  /// 并成功的状态变更各报一条，与「成功响应后」的字典口径一致）。
+  void postLiked({required InteractionSource source}) {
+    _track('post_liked', {'source': source.value});
+  }
+
+  /// 取消点赞成功响应后。
+  void postUnliked({required InteractionSource source}) {
+    _track('post_unliked', {'source': source.value});
+  }
+
+  /// 收藏成功响应后。
+  void postFavorited({required InteractionSource source}) {
+    _track('post_favorited', {'source': source.value});
+  }
+
+  /// 取消收藏成功响应后。
+  void postUnfavorited({required InteractionSource source}) {
+    _track('post_unfavorited', {'source': source.value});
+  }
+
+  /// 评论提交成功响应后。
+  ///
+  /// [durationMs]：本次输入会话（首个字符输入）→ 成功响应的耗时
+  /// （评论不设 started 事件，时长随成功事件带出）；
+  /// [textLength] 经 [textLengthBucketOf] 分桶后上报，精确字数不出端。
+  void commentCreateSucceeded({
+    required int durationMs,
+    required bool isReply,
+    required int textLength,
+  }) {
+    _track('comment_create_succeeded', {
+      'durationMs': durationMs,
+      'isReply': isReply,
+      'textLengthBucket': textLengthBucketOf(textLength),
+    });
+  }
+
+  /// 评论提交失败。
+  ///
+  /// [errorCode] 为业务错误码（网络错误时缺席）；[httpStatus] 由五位
+  /// 业务码推导（`code ~/ 100`，pet 域同款口径）；[attemptSeq] 为本次
+  /// 输入会话内第几次提交尝试（从 1 起，成功或清空输入后重置）。
+  void commentCreateFailed({
+    required CommentCreateFailureReason reason,
+    required int attemptSeq,
+    int? errorCode,
+  }) {
+    _track('comment_create_failed', {
+      'failureReason': reason.value,
+      'attemptSeq': attemptSeq,
+      'errorCode': ?errorCode,
+      if (errorCode != null && errorCode >= 10000)
+        'httpStatus': errorCode ~/ 100,
+    });
+  }
+
+  /// 关注成功响应后。
+  void userFollowed({required InteractionSource source}) {
+    _track('user_followed', {'source': source.value});
+  }
+
+  /// 取关成功响应后。
+  void userUnfollowed({required InteractionSource source}) {
+    _track('user_unfollowed', {'source': source.value});
+  }
+}

lib/features/community/community_models.dart

@@ -60,9 +60,14 @@ enum MediaKind {
       _enumFromJson(values, value, 'kind');
 }
 
-/// 上传用途白名单（M3 定型仅 post_image，决定 objectKey 前缀）。
+/// 上传用途白名单（契约 v1.4.0 三值；决定 objectKey 前缀）。
+///
+/// **用途即引用侧的类型检查**：引用时服务端校验 purpose 相符，故帖图不能
+/// 当头像、两种头像也互不通用（不符者 404/40405）。
 enum MediaPurpose {
-  postImage('post_image');
+  postImage('post_image'),
+  userAvatar('user_avatar'),
+  petAvatar('pet_avatar');
 
   const MediaPurpose(this.wire);
 
@@ -628,3 +633,25 @@ class FollowStats {
   final int followingCount;
   final bool followedByMe;
 }
+
+/// 我的社区数字（`GET /api/v1/me/community-stats`，契约 v1.4.0 新增）。
+///
+/// 两数同一集合：本人的、已发布的、未软删的帖（草稿 / 软删 / hidden /
+/// archived 均不计；自己赞自己**计入**，与帖子详情的 likeCount 同口径）。
+/// 空数据为 `0` 而非 null，且该端点**永不 404**——任何已认证用户都有 stats。
+class CommunityStats {
+  const CommunityStats({
+    required this.receivedLikeCount,
+    required this.publishedPostCount,
+  });
+
+  factory CommunityStats.fromJson(Map<String, dynamic> json) {
+    return CommunityStats(
+      receivedLikeCount: json['receivedLikeCount'] as int,
+      publishedPostCount: json['publishedPostCount'] as int,
+    );
+  }
+
+  final int receivedLikeCount;
+  final int publishedPostCount;
+}

lib/features/community/community_repository.dart

@@ -17,7 +17,9 @@ abstract class CommunityRepository {
   Future<MediaAsset> completeMediaUpload(String assetId);
 
   // ---- 帖子 CRUD / 发布 ----
-  Future<Post> createPost(CreatePostRequest request);
+  /// [idempotencyKey]：调用方持键（T3-17 发布页「同键重放」——网络失败重试
+  /// 沿用同键命中服务端首帖，不重复建帖；缺省则本层每次调用换新键）。
+  Future<Post> createPost(CreatePostRequest request, {String? idempotencyKey});
   Future<Post> getPost(String postId);
   Future<Post> updatePost(String postId, UpdatePostRequest request);
   Future<void> deletePost(String postId);
@@ -53,6 +55,9 @@ abstract class CommunityRepository {
   Future<FollowState> followUser(String userId);
   Future<FollowState> unfollowUser(String userId);
   Future<FollowStats> getFollowStats(String userId);
+
+  // ---- 我的社区数字（主体恒为调用者，路径上无 userId）----
+  Future<CommunityStats> getMyCommunityStats();
 }
 
 /// 基于 [ApiClient] 的实现。全部端点走 Bearer 鉴权（复用既有 token
@@ -85,6 +90,7 @@ class ApiCommunityRepository implements CommunityRepository {
     Object? body,
     Map<String, Object?>? query,
     bool idempotent = false,
+    String? idempotencyKey,
     bool media = false,
   }) async {
     try {
@@ -93,7 +99,9 @@ class ApiCommunityRepository implements CommunityRepository {
         method: method,
         body: body,
         query: query,
-        headers: idempotent ? {'Idempotency-Key': _uuid.v4()} : null,
+        headers: idempotent
+            ? {'Idempotency-Key': idempotencyKey ?? _uuid.v4()}
+            : null,
         requiresAuth: true,
       );
     } on ApiBusinessException catch (error) {
@@ -132,12 +140,16 @@ class ApiCommunityRepository implements CommunityRepository {
   // ---- posts ----
 
   @override
-  Future<Post> createPost(CreatePostRequest request) async {
+  Future<Post> createPost(
+    CreatePostRequest request, {
+    String? idempotencyKey,
+  }) async {
     final data = await _request(
       '/api/v1/posts',
       method: 'POST',
       body: request.toJson(),
       idempotent: true,
+      idempotencyKey: idempotencyKey,
     );
     return Post.fromJson(_asMap(data));
   }
@@ -292,4 +304,12 @@ class ApiCommunityRepository implements CommunityRepository {
     final data = await _request('/api/v1/users/$userId/follow-stats');
     return FollowStats.fromJson(_asMap(data));
   }
+
+  // ---- 我的社区数字 ----
+
+  @override
+  Future<CommunityStats> getMyCommunityStats() async {
+    final data = await _request('/api/v1/me/community-stats');
+    return CommunityStats.fromJson(_asMap(data));
+  }
 }

lib/features/community/media_uploader.dart

@@ -7,6 +7,7 @@ import 'package:patbond_flutter/features/community/community_repository.dart';
 import 'package:patbond_flutter/features/community/media_compression.dart';
 import 'package:patbond_flutter/features/community/media_direct_upload.dart';
 import 'package:patbond_flutter/features/community/media_picking.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
 
 /// 单张图的上传阶段（05 号规范 §3.3 四视觉态的底层状态模型）。
 ///
@@ -76,6 +77,12 @@ class _UploadTask {
   bool retryable = false;
   bool cancelled = false;
 
+  /// 本图第几次上传尝试（媒体三段埋点 attemptSeq，从 1 起；retry 递增）。
+  int attemptSeq = 1;
+
+  /// 本次尝试的 started 时刻（succeeded 的 durationMs 口径）。
+  DateTime? attemptStartedAt;
+
   /// 压缩产物缓存（重试跳过重压缩）。
   CompressedMediaImage? compressed;
 
@@ -115,12 +122,16 @@ class _UploadTask {
 ///   对外可见的 [MediaUploadItem.assetId] 与 ready 态严格绑定（断言），
 ///   [buildAttachRequests] 仅在全员 ready 时可用。
 /// - 预签名凭据只存内存、用完即弃，不持久化（既有纪律）。
+/// - **媒体三段埋点**（T3-17）：每次尝试恰一条 started，收敛为
+///   succeeded / failed 各一条；`sizeBucket` 统一取原图字节数。
 class MediaUploader extends ChangeNotifier {
   MediaUploader({
     required this._repository,
     MediaImagePicker? picker,
     MediaImageCompressor? compressor,
     MediaDirectUploadClient? directUpload,
+    this._analytics,
+    this.purpose = MediaPurpose.postImage,
     this.maxImages = 9,
     this.maxConcurrentUploads = 2,
     this.maxByteSize = 10 * 1024 * 1024,
@@ -135,9 +146,19 @@ class MediaUploader extends ChangeNotifier {
   final MediaImagePicker _picker;
   final MediaImageCompressor _compressor;
   final MediaDirectUploadClient _directUpload;
+
+  /// 媒体上传三段埋点（T3-17 接入；未注入即不上报）。
+  final PostAnalytics? _analytics;
+
   final DateTime Function() _now;
 
-  /// 九宫格上限（05 号规范 §3.2）。
+  /// 上传用途（决定服务端 objectKey 前缀，也是引用侧的类型检查依据）：
+  /// 发布页 `post_image`、资料页头像 `user_avatar`、宠物头像 `pet_avatar`。
+  /// 用途不符的 asset 在引用时被答 404/40405，所以这个值必须由调用方
+  /// 按场景显式给对（M3.5-08/09 起本类不再只服务发布页）。
+  final MediaPurpose purpose;
+
+  /// 九宫格上限（05 号规范 §3.2）；头像场景传 1。
   final int maxImages;
 
   final int maxConcurrentUploads;
@@ -244,24 +265,28 @@ class MediaUploader extends ChangeNotifier {
     task.errorMessage = null;
     task.retryable = false;
     task.progress = 0;
+    task.attemptSeq += 1;
     task.phase = MediaItemPhase.queued;
     notifyListeners();
     unawaited(_run(task));
   }
 
   /// 移除一张图（任意态可移除）；在途请求结果一律作废，未 confirm 的
-  /// 服务端 asset 弃引用（服务端超时清理兜底）。
+  /// 服务端 asset 弃引用（服务端超时清理兜底）。在途任务被移除按
+  /// `cancelled` 上报一条上传失败（06 §1.4「用户取消」口径）。
   void remove(int localId) {
     final task = _taskOrNull(localId);
     if (task == null) return;
+    _reportCancelled(task);
     task.cancelled = true;
     _tasks.remove(task);
     notifyListeners();
   }
 
-  /// 清空全部（发布成功/离开页面时调用）。
+  /// 清空全部（发布成功/离开页面时调用）；在途任务同 [remove] 记 cancelled。
   void reset() {
     for (final task in _tasks) {
+      _reportCancelled(task);
       task.cancelled = true;
     }
     _tasks.clear();
@@ -282,6 +307,12 @@ class MediaUploader extends ChangeNotifier {
     await _acquireSlot();
     try {
       if (task.cancelled) return;
+      // 一次尝试恰一条 started（含压缩段：压缩失败也在漏斗内可见）。
+      task.attemptStartedAt = _now();
+      _analytics?.mediaUploadStarted(
+        mediaType: MediaType.image,
+        byteSize: task.source.bytes.length,
+      );
       final compressed = await _compress(task);
       if (compressed == null || task.cancelled) return;
       await _uploadAndConfirm(task, compressed);
@@ -308,10 +339,20 @@ class MediaUploader extends ChangeNotifier {
         }
       }
     } catch (_) {
-      _fail(task, message: '图片处理失败', retryable: true);
+      _fail(
+        task,
+        message: '图片处理失败',
+        retryable: true,
+        reason: MediaUploadFailureReason.unsupportedFormat,
+      );
       return null;
     }
-    _fail(task, message: '图片过大，压缩后仍超过 10 MB', retryable: false);
+    _fail(
+      task,
+      message: '图片过大，压缩后仍超过 10 MB',
+      retryable: false,
+      reason: MediaUploadFailureReason.mediaTooLarge,
+    );
     return null;
   }
 
@@ -335,7 +376,12 @@ class MediaUploader extends ChangeNotifier {
     while (true) {
       if (_credentialsExpired(credentials)) {
         if (renewed) {
-          _fail(task, message: '上传凭据已过期', retryable: true);
+          _fail(
+            task,
+            message: '上传凭据已过期',
+            retryable: true,
+            reason: MediaUploadFailureReason.serverError,
+          );
           return;
         }
         renewed = true;
@@ -380,6 +426,9 @@ class MediaUploader extends ChangeNotifier {
           task,
           message: error.statusCode == null ? '网络中断，上传失败' : '上传被存储服务拒绝',
           retryable: true,
+          reason: error.statusCode == null
+              ? MediaUploadFailureReason.networkError
+              : MediaUploadFailureReason.serverError,
         );
         return;
       }
@@ -398,12 +447,25 @@ class MediaUploader extends ChangeNotifier {
     }
     if (task.cancelled) return;
     if (asset.status != MediaAssetStatus.ready) {
-      _fail(task, message: '上传确认未通过', retryable: true);
+      _fail(
+        task,
+        message: '上传确认未通过',
+        retryable: true,
+        reason: MediaUploadFailureReason.serverError,
+      );
       return;
     }
     task.readyAssetId = asset.id;
     task.progress = 1;
     _transition(task, MediaItemPhase.ready);
+    final startedAt = task.attemptStartedAt;
+    _analytics?.mediaUploadSucceeded(
+      mediaType: MediaType.image,
+      byteSize: task.source.bytes.length,
+      durationMs: startedAt == null
+          ? 0
+          : _now().difference(startedAt).inMilliseconds,
+    );
   }
 
   Future<MediaUploadCredentials> _createUpload(
@@ -412,7 +474,7 @@ class MediaUploader extends ChangeNotifier {
     return _repository.createMediaUpload(
       CreateMediaUploadRequest(
         kind: MediaKind.image,
-        purpose: MediaPurpose.postImage,
+        purpose: purpose,
         mimeType: compressed.mimeType,
         byteSize: compressed.byteSize,
       ),
@@ -424,12 +486,22 @@ class MediaUploader extends ChangeNotifier {
 
   void _failFromApi(_UploadTask task, Exception error) {
     // 参数被服务端拒绝（40000：mime/byteSize 白名单外）重试无意义，终态。
-    final retryable =
+    final isParamError =
-        error is! ApiBusinessException || error.code != ApiCodes.paramError;
+        error is ApiBusinessException && error.code == ApiCodes.paramError;
     _fail(
       task,
       message: error is ApiBusinessException ? error.message : '网络异常，请重试',
-      retryable: retryable,
+      retryable: !isParamError,
+      // 客户端已本地保证 ≤10 MiB，故 40000 归因为格式白名单外；
+      // 会话失效不上报（reason 传 null），其余业务/限流并入 server_error。
+      reason: switch (error) {
+        ApiBusinessException _ when isParamError =>
+          MediaUploadFailureReason.unsupportedFormat,
+        SessionExpiredException _ => null,
+        ApiNetworkException _ => MediaUploadFailureReason.networkError,
+        _ => MediaUploadFailureReason.serverError,
+      },
+      errorCode: error is ApiBusinessException ? error.code : null,
     );
   }
 
@@ -437,14 +509,36 @@ class MediaUploader extends ChangeNotifier {
     _UploadTask task, {
     required String message,
     required bool retryable,
+    required MediaUploadFailureReason? reason,
+    int? errorCode,
   }) {
     if (task.cancelled) return;
     task.phase = MediaItemPhase.failed;
     task.errorMessage = message;
     task.retryable = retryable;
+    if (reason != null) {
+      _analytics?.mediaUploadFailed(
+        mediaType: MediaType.image,
+        byteSize: task.source.bytes.length,
+        reason: reason,
+        attemptSeq: task.attemptSeq,
+        errorCode: errorCode,
+      );
+    }
     notifyListeners();
   }
 
+  /// 在途任务被删格/清空作废 → `cancelled`（已 ready / 已 failed 不报）。
+  void _reportCancelled(_UploadTask task) {
+    if (task.cancelled || !task.snapshot().isBusy) return;
+    _analytics?.mediaUploadFailed(
+      mediaType: MediaType.image,
+      byteSize: task.source.bytes.length,
+      reason: MediaUploadFailureReason.cancelled,
+      attemptSeq: task.attemptSeq,
+    );
+  }
+
   void _transition(_UploadTask task, MediaItemPhase phase) {
     if (task.cancelled) return;
     task.phase = phase;
@@ -469,3 +563,15 @@ class MediaUploader extends ChangeNotifier {
     }
   }
 }
+
+/// [MediaUploader] 的构造口（发布页每次进入建一个，退出即 dispose）。
+///
+/// 生产缺省即 `MediaUploader(repository: ..., analytics: ...)`；注入点为
+/// **测试与桌面实测专用**——Linux 桌面既无 image_picker 也无
+/// flutter_image_compress 的原生实现，桌面真链路只替换选图与压缩两层，
+/// 其余（createUpload / 直传 PUT / confirm）全为生产实现。
+typedef MediaUploaderFactory =
+    MediaUploader Function(
+      CommunityRepository repository,
+      PostAnalytics? analytics,
+    );

lib/features/community/post_analytics.dart

@@ -0,0 +1,239 @@
+import 'package:patbond_flutter/analytics/page_view_tracker.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart'
+    show textLengthBucketOf;
+
+/// post 域埋点强类型封装（06 号规划 §1.4 发布漏斗五事件 + 媒体上传三段；
+/// 后端白名单随 api dev@`8089c06` 就绪，22 号报告 §1 键集逐一对齐）。
+/// 沿 pet/feed/互动域惯例：枚举编译期锁死，业务代码禁止手拼事件名与属性。
+///
+/// 隐私纪律（06 §1.3 红线）：正文只出分桶不出字数（红线 1）；postId /
+/// assetId 等内容 ID 一律不进 props（红线 2）；媒体只报 [MediaType] 与
+/// [mediaSizeBucketOf] 分桶，文件名/路径/URL 禁止（红线 4）。
+///
+/// **不得上报**（22 号 §1 末段锁死为 unknown）：`post_impression`、
+/// `post_viewed`、`post_like_failed` 等——本文件不提供其封装。
+
+/// 发帖入口（06 §1.4 `post_create_started.entryPoint`）。
+/// M3 接 create_tab / feed；topic_detail / pet_detail 随后续页面启用。
+enum PostEntryPoint {
+  createTab('create_tab'),
+  feed('feed'),
+  topicDetail('topic_detail'),
+  petDetail('pet_detail');
+
+  const PostEntryPoint(this.value);
+
+  final String value;
+}
+
+/// 草稿保存触发方式（06 §1.4：**自动保存不埋**，防高频）。
+enum DraftSaveTrigger {
+  /// 「存草稿」按钮显式保存。
+  manual('manual'),
+
+  /// 离开发布页时经「保留草稿？」确认保存。
+  onExit('on_exit');
+
+  const DraftSaveTrigger(this.value);
+
+  final String value;
+}
+
+/// 发布失败原因（06 §1.4 枚举；`content_rejected` 待拍板未启用，
+/// `not_found` 取 §1.4「失败枚举基底」的复用条——草稿已被别处删除）。
+enum PostPublishFailureReason {
+  validationError('validation_error'),
+  mediaUploadIncomplete('media_upload_incomplete'),
+  notFound('not_found'),
+  rateLimited('rate_limited'),
+  networkError('network_error'),
+  serverError('server_error');
+
+  const PostPublishFailureReason(this.value);
+
+  final String value;
+}
+
+/// 媒体类型（M3 仅 image；video 随视频能力启用）。
+enum MediaType {
+  image('image'),
+  video('video');
+
+  const MediaType(this.value);
+
+  final String value;
+}
+
+/// 单文件上传失败原因（06 §1.4 媒体漏斗枚举）。
+enum MediaUploadFailureReason {
+  mediaTooLarge('media_too_large'),
+  unsupportedFormat('unsupported_format'),
+  networkError('network_error'),
+  serverError('server_error'),
+
+  /// 用户在上传途中删格 / 离开发布页作废在途任务。
+  cancelled('cancelled');
+
+  const MediaUploadFailureReason(this.value);
+
+  final String value;
+}
+
+/// 类型化异常 → 发布失败原因；会话失效返回 null（应用即将回登录页，
+/// 不作为发布失败上报，feed / 互动域同款口径）。
+///
+/// 映射取舍（26 号报告 §3 有对照表）：42203 恰为
+/// [PostPublishFailureReason.mediaUploadIncomplete]；40905（同键异
+/// payload）归 validation_error——提交内容与幂等键不一致属提交侧问题，
+/// 非服务端故障；40902（乐观锁，自动刷新 version 重提仍失败）归
+/// server_error 兜底。
+PostPublishFailureReason? postPublishFailureReasonOf(ApiException error) =>
+    switch (error) {
+      ApiNetworkException _ => PostPublishFailureReason.networkError,
+      ApiRateLimitException _ => PostPublishFailureReason.rateLimited,
+      SessionExpiredException _ => null,
+      ApiBusinessException(:final code) => switch (code) {
+        ApiCodes.paramError || ApiCodes.idempotencyKeyMismatch =>
+          PostPublishFailureReason.validationError,
+        ApiCodes.mediaNotReady =>
+          PostPublishFailureReason.mediaUploadIncomplete,
+        ApiCodes.postNotFound ||
+        ApiCodes.mediaNotFound => PostPublishFailureReason.notFound,
+        _ => PostPublishFailureReason.serverError,
+      },
+    };
+
+/// 媒体大小分桶（06 §1.3 红线 4：不报精确字节数）。
+/// `lt_1mb` / `mb_1_5` / `mb_5_20` / `gte_20mb`，以 MiB 为界
+/// （与 MediaUploader 的 10 MiB 上限同一进制）。
+String mediaSizeBucketOf(int byteSize) {
+  const mib = 1024 * 1024;
+  if (byteSize < mib) return 'lt_1mb';
+  if (byteSize < 5 * mib) return 'mb_1_5';
+  if (byteSize < 20 * mib) return 'mb_5_20';
+  return 'gte_20mb';
+}
+
+/// 发布漏斗 + 媒体上传三段埋点（22 号白名单 v3 事件 22~29）。
+class PostAnalytics {
+  PostAnalytics(this._track);
+
+  /// 生产传 `AnalyticsService.trackEvent`，测试传录制桩。
+  final TrackEventFn _track;
+
+  // ---- 发布漏斗 ----
+
+  /// 进入发布页并产生**首次输入**（首个字符或首次选媒体），每次进入记一次。
+  /// 草稿恢复不算输入（非用户动作，不上报）。
+  void postCreateStarted({required PostEntryPoint entryPoint}) {
+    _track('post_create_started', {'entryPoint': entryPoint.value});
+  }
+
+  /// 草稿保存**成功响应后**；仅显式保存与离开时保存（自动保存不埋）。
+  void postDraftSaved({
+    required DraftSaveTrigger trigger,
+    required int mediaCount,
+  }) {
+    _track('post_draft_saved', {
+      'trigger': trigger.value,
+      'mediaCount': mediaCount,
+    });
+  }
+
+  /// 发布成功响应后（漏斗事件，H5/H6 核心数据源）。
+  ///
+  /// [durationMs]：`post_create_started` → 发布成功；[textLength] 经
+  /// [textLengthBucketOf] 分桶后上报，精确字数不出端；[fromDraft] 指
+  /// 「本次发布基于先前保存/恢复的草稿」（发布内部的建草稿→迁移两步
+  /// 不算，见 26 号报告 §3）。
+  void postPublishSucceeded({
+    required int durationMs,
+    required int mediaCount,
+    required int topicCount,
+    required int textLength,
+    required bool fromDraft,
+  }) {
+    _track('post_publish_succeeded', {
+      'durationMs': durationMs,
+      'mediaCount': mediaCount,
+      'topicCount': topicCount,
+      'textLengthBucket': textLengthBucketOf(textLength),
+      'fromDraft': fromDraft,
+    });
+  }
+
+  /// 发布失败 / 超时 / 本地校验拦截。
+  ///
+  /// [errorCode] 为业务错误码（网络错误时缺席）；[httpStatus] 由五位业务码
+  /// 推导（`code ~/ 100`，pet 域同款）；[attemptSeq] 为本次发布会话内第几次
+  /// 尝试（从 1 起，发布成功或离开发布页后重置）。
+  void postPublishFailed({
+    required PostPublishFailureReason reason,
+    required int attemptSeq,
+    int? errorCode,
+  }) {
+    _track('post_publish_failed', {
+      'failureReason': reason.value,
+      'attemptSeq': attemptSeq,
+      'errorCode': ?errorCode,
+      if (errorCode != null && errorCode >= 10000)
+        'httpStatus': errorCode ~/ 100,
+    });
+  }
+
+  /// 删帖成功响应后（单事件风格，无专有属性；失败靠服务端错误率观测）。
+  /// M3 触点：发布页「不保留草稿」删除服务端草稿。
+  void postDeleted() {
+    _track('post_deleted', const {});
+  }
+
+  // ---- 媒体上传三段（逐文件）----
+
+  /// 单个文件开始上传（一次尝试恰一条；重试各记一条）。
+  ///
+  /// [byteSize] 取**选图原文件**字节数，保证同一次尝试三段事件的
+  /// `sizeBucket` 一致（压缩产物大小不另开一套桶）。
+  void mediaUploadStarted({
+    required MediaType mediaType,
+    required int byteSize,
+  }) {
+    _track('post_media_upload_started', {
+      'mediaType': mediaType.value,
+      'sizeBucket': mediaSizeBucketOf(byteSize),
+    });
+  }
+
+  /// 单文件上传成功（confirm 返回 ready 后）。
+  /// [durationMs]：本次尝试 started → ready。
+  void mediaUploadSucceeded({
+    required MediaType mediaType,
+    required int byteSize,
+    required int durationMs,
+  }) {
+    _track('post_media_upload_succeeded', {
+      'mediaType': mediaType.value,
+      'sizeBucket': mediaSizeBucketOf(byteSize),
+      'durationMs': durationMs,
+    });
+  }
+
+  /// 单文件失败 / 超时 / 用户取消。
+  void mediaUploadFailed({
+    required MediaType mediaType,
+    required int byteSize,
+    required MediaUploadFailureReason reason,
+    required int attemptSeq,
+    int? errorCode,
+  }) {
+    _track('post_media_upload_failed', {
+      'mediaType': mediaType.value,
+      'sizeBucket': mediaSizeBucketOf(byteSize),
+      'failureReason': reason.value,
+      'attemptSeq': attemptSeq,
+      'errorCode': ?errorCode,
+      if (errorCode != null && errorCode >= 10000)
+        'httpStatus': errorCode ~/ 100,
+    });
+  }
+}

lib/features/community/post_compose_page.dart

@@ -0,0 +1,704 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
+import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_display.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/community_repository.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
+import 'package:uuid/uuid.dart';
+
+/// 发布页（P3，05 号规范 §2.3；T3-17 真实数据整页落地）。
+///
+/// 结构：媒体选择区（[PostMediaEditGrid] 组装 [MediaUploader]）→ 正文
+/// → 类目（general / help）→ 位置占位；AppBar 三件套「取消 / 发布动态 /
+/// 发布」，另置「存草稿」。
+///
+/// 两条提交路径（15 号后端语义 §2.4）：
+///
+/// - **直接发布** = `createPost(status: draft)` 建草稿 → `PATCH
+///   {status: published}` 迁移发布。两步而非「一步建 published」是为了让
+///   「发布失败但草稿已保存」成为事实而不是话术：迁移这一步失败时草稿
+///   已在服务端，用户内容不会丢。
+/// - **存草稿退出** = 同一个 `createPost(status: draft)`（或对已有草稿
+///   `PATCH`），随后离页。
+///
+/// 幂等纪律：建草稿的 `Idempotency-Key` 由**本页持有**——网络失败重试
+/// 沿用同键（服务端命中首帖，不重复建帖）；表单一经改动即换新键
+/// （避免「同键异 payload」的 40905 常态化）。
+///
+/// 草稿管理最小实现：进页拉取「我的草稿」最新一条并恢复（05 §2.3 的
+/// 「已恢复上次草稿」提示条），完整草稿列表页留待（26 号报告 §7）。
+class PostComposePage extends StatefulWidget {
+  const PostComposePage({
+    required this.controller,
+    super.key,
+    this.entryPoint = PostEntryPoint.createTab,
+    this.analytics,
+    this.uploaderFactory,
+    this.now,
+  });
+
+  /// Tab 级单例（app.dart 装配）：发布成功后由调用方触发 Feed 刷新。
+  final CommunityController controller;
+
+  /// 入口归因（`post_create_started.entryPoint`）。
+  final PostEntryPoint entryPoint;
+
+  /// post 域埋点（发布漏斗五事件 + 媒体三段，媒体段经 [MediaUploader]）。
+  final PostAnalytics? analytics;
+
+  /// [MediaUploader] 构造口（测试 / 桌面实测替换选图与压缩层）。
+  final MediaUploaderFactory? uploaderFactory;
+
+  /// 时钟注入口（durationMs 断言用；缺省取当前时间）。
+  final DateTime Function()? now;
+
+  @override
+  State<PostComposePage> createState() => _PostComposePageState();
+}
+
+class _PostComposePageState extends State<PostComposePage> {
+  static const _maxContentLength = 1000;
+
+  final _contentController = TextEditingController();
+  final _uuid = const Uuid();
+
+  late final MediaUploader _uploader;
+
+  PostCategory _category = PostCategory.general;
+
+  /// 服务端草稿标识与乐观锁版本（建草稿成功或恢复草稿后非空）。
+  String? _draftPostId;
+  int? _draftVersion;
+
+  /// 恢复来的草稿既有媒体（uploader 只持本地选图，服务端媒体只读呈现）。
+  List<PostMediaItem> _draftMedia = const [];
+
+  /// 「已恢复上次草稿」提示条可见性。
+  bool _restoredBannerVisible = false;
+
+  /// 草稿恢复期间的输入监听抑制（恢复不是「首次输入」，不发 started）。
+  bool _restoring = false;
+
+  /// 本页是否基于先前保存/恢复的草稿发布（`fromDraft` 口径）。
+  bool _fromDraft = false;
+
+  /// 上一次同步到服务端的 ready assetId 签名（media 三态判定：
+  /// 与当前一致即 PATCH 缺席不动，不一致才整组替换）。
+  String? _syncedMediaSignature;
+
+  /// 建草稿幂等键（同键重放；表单改动即置 null 换新键）。
+  String? _idempotencyKey;
+
+  bool _publishing = false;
+  bool _savingDraft = false;
+
+  /// 发布失败横幅（页内停留供对照，不用 SnackBar）。
+  String? _publishErrorMessage;
+
+  /// 「草稿已保存」的伴随提示（发布失败时告知内容未丢）。
+  bool _draftPreservedHint = false;
+
+  /// 「已保存草稿 ✓」提示（保存动作后显示）。
+  bool _draftSavedHint = false;
+
+  /// 首次输入已上报 started。
+  bool _started = false;
+  DateTime? _startedAt;
+
+  /// 本页发布尝试序号（attemptSeq，从 1 起）。
+  int _publishAttemptSeq = 0;
+
+  CommunityController get _controller => widget.controller;
+
+  DateTime _nowValue() => (widget.now ?? DateTime.now)();
+
+  @override
+  void initState() {
+    super.initState();
+    _uploader = (widget.uploaderFactory ?? _defaultUploaderFactory)(
+      _controller.repository,
+      widget.analytics,
+    );
+    _uploader.addListener(_onUploaderChanged);
+    _contentController.addListener(_onContentChanged);
+    unawaited(_restoreLatestDraft());
+  }
+
+  static MediaUploader _defaultUploaderFactory(
+    CommunityRepository repository,
+    PostAnalytics? analytics,
+  ) => MediaUploader(repository: repository, analytics: analytics);
+
+  @override
+  void dispose() {
+    _uploader.removeListener(_onUploaderChanged);
+    // 在途上传作废（未 confirm 的 asset 弃引用，服务端超时清理兜底）。
+    _uploader.reset();
+    _uploader.dispose();
+    _contentController.dispose();
+    super.dispose();
+  }
+
+  // ---- 输入与状态 ----
+
+  String get _content => _contentController.text.trim();
+
+  bool get _isEmptyForm =>
+      _content.isEmpty && _uploader.isEmpty && _draftMedia.isEmpty;
+
+  /// 发布 gating（05 §2.2/§2.3 + 后端 content 必填）：正文非空、
+  /// 在场媒体全部 ready、无在途提交。
+  bool get _canPublish =>
+      _content.isNotEmpty &&
+      (_uploader.isEmpty || _uploader.allReady) &&
+      !_publishing &&
+      !_savingDraft;
+
+  void _onContentChanged() {
+    if (_restoring) return;
+    _markDirty();
+    _reportStartedOnce();
+    setState(() {});
+  }
+
+  void _onUploaderChanged() {
+    if (_uploader.items.isNotEmpty) _reportStartedOnce();
+    _markDirty();
+    setState(() {});
+  }
+
+  /// 表单一经改动即弃用旧幂等键（下次提交换新键，杜绝 40905 常态化）。
+  void _markDirty() {
+    _idempotencyKey = null;
+    _draftSavedHint = false;
+  }
+
+  void _reportStartedOnce() {
+    if (_started) return;
+    if (_content.isEmpty && _uploader.isEmpty) return;
+    _started = true;
+    _startedAt = _nowValue();
+    widget.analytics?.postCreateStarted(entryPoint: widget.entryPoint);
+  }
+
+  // ---- 草稿恢复（最小实现：最新一条）----
+
+  Future<void> _restoreLatestDraft() async {
+    try {
+      final page = await _controller.repository.listMyPosts(
+        limit: 1,
+        status: PostStatus.draft,
+      );
+      if (!mounted || page.items.isEmpty) return;
+      final draft = page.items.first;
+      _restoring = true;
+      _contentController.text = draft.content;
+      _restoring = false;
+      setState(() {
+        _draftPostId = draft.id;
+        _draftVersion = draft.version;
+        _draftMedia = draft.media;
+        // ai_creation（M4 预留读侧值）不在发布页可选集内，回落 general。
+        _category = draft.category == PostCategory.aiCreation
+            ? PostCategory.general
+            : draft.category;
+        _restoredBannerVisible = true;
+        _fromDraft = true;
+        _syncedMediaSignature = _mediaSignature();
+      });
+    } on ApiException {
+      // 草稿恢复失败静默降级为「新建」，不阻塞发布（不打扰）。
+    }
+  }
+
+  void _clearRestoredDraft() {
+    _restoring = true;
+    _contentController.clear();
+    _restoring = false;
+    setState(() {
+      _draftMedia = const [];
+      _restoredBannerVisible = false;
+      _idempotencyKey = null;
+    });
+  }
+
+  // ---- 媒体 ----
+
+  Future<void> _pickImages() async {
+    await _uploader.pickAndAdd();
+    if (!mounted) return;
+    if (_uploader.remainingSlots <= 0) {
+      _showSnackBar('最多可选 ${_uploader.maxImages} 张图片');
+    }
+  }
+
+  String _mediaSignature() => _uploader.items
+      .where((item) => item.isReady)
+      .map((item) => item.assetId)
+      .join(',');
+
+  /// 当前选图的挂接请求（全 ready 才可取；封面取首张）。
+  List<PostMediaAttachRequest>? _mediaAttachOrNull() =>
+      _uploader.isEmpty ? null : _uploader.buildAttachRequests();
+
+  // ---- 发布（建草稿 → 迁移发布）----
+
+  Future<void> _publish() async {
+    if (!_canPublish) return;
+    FocusScope.of(context).unfocus();
+    _publishAttemptSeq += 1;
+    setState(() {
+      _publishing = true;
+      _publishErrorMessage = null;
+      _draftPreservedHint = false;
+    });
+    final signature = _mediaSignature();
+    final fromDraft = _fromDraft && _draftPostId != null;
+    try {
+      if (_draftPostId == null) {
+        final key = _idempotencyKey ??= _uuid.v4();
+        final draft = await _controller.repository.createPost(
+          CreatePostRequest(
+            content: _content,
+            category: _category,
+            status: PostStatus.draft,
+            media: _mediaAttachOrNull(),
+          ),
+          idempotencyKey: key,
+        );
+        _draftPostId = draft.id;
+        _draftVersion = draft.version;
+        _syncedMediaSignature = signature;
+      }
+      await _patchPublish(signature);
+      if (!mounted) return;
+      widget.analytics?.postPublishSucceeded(
+        durationMs: _elapsedSinceStart(),
+        mediaCount: _uploader.items.length + _keptDraftMediaCount(signature),
+        // 话题（TopicChip / 话题选择 sheet）无契约端点，M3 恒 0。
+        topicCount: 0,
+        textLength: _content.length,
+        fromDraft: fromDraft,
+      );
+      _uploader.reset();
+      Navigator.of(context).pop(true);
+    } on ApiException catch (error) {
+      if (!mounted) return;
+      _handlePublishError(error);
+    } finally {
+      if (mounted) setState(() => _publishing = false);
+    }
+  }
+
+  /// PATCH 迁移发布；乐观锁过期（40902，别处改过草稿）自动刷新 version
+  /// 重提一次。已发布帖重复提交为幂等 no-op（15 号 §2.4），弱网重放安全。
+  Future<void> _patchPublish(String signature) async {
+    final media = signature == _syncedMediaSignature
+        ? null // 缺席不动（服务端媒体与本地选图一致）
+        : _mediaAttachOrNull() ?? const <PostMediaAttachRequest>[];
+    UpdatePostRequest request(int version) => UpdatePostRequest(
+      version: version,
+      content: _content,
+      category: _category,
+      publish: true,
+      media: media,
+    );
+    try {
+      await _controller.repository.updatePost(
+        _draftPostId!,
+        request(_draftVersion!),
+      );
+    } on PostVersionConflictException {
+      final latest = await _controller.repository.getPost(_draftPostId!);
+      _draftVersion = latest.version;
+      await _controller.repository.updatePost(
+        _draftPostId!,
+        request(latest.version),
+      );
+    }
+    _syncedMediaSignature = signature;
+  }
+
+  /// 恢复草稿的服务端既有媒体在本次发布中被保留的张数（mediaCount 口径）。
+  int _keptDraftMediaCount(String signature) =>
+      signature == _syncedMediaSignature && _uploader.isEmpty
+      ? _draftMedia.length
+      : 0;
+
+  int _elapsedSinceStart() {
+    final startedAt = _startedAt;
+    if (startedAt == null) return 0;
+    return _nowValue().difference(startedAt).inMilliseconds;
+  }
+
+  void _handlePublishError(ApiException error) {
+    final reason = postPublishFailureReasonOf(error);
+    if (reason != null) {
+      widget.analytics?.postPublishFailed(
+        reason: reason,
+        attemptSeq: _publishAttemptSeq,
+        errorCode: error is ApiBusinessException ? error.code : null,
+      );
+    }
+    if (error is IdempotencyMismatchException) {
+      // 同键异 payload：弃用旧键，下次提交换新键即可成功。
+      _idempotencyKey = null;
+    }
+    if (error is PostNotFoundException) {
+      // 草稿在别处被删：解除关联，重试走全新建草稿。
+      _draftPostId = null;
+      _draftVersion = null;
+      _fromDraft = false;
+    }
+    setState(() {
+      _publishErrorMessage = postPublishErrorMessage(error);
+      // 草稿已在服务端 → 明确告知内容未丢（本单核心提示语义）。
+      _draftPreservedHint = _draftPostId != null;
+    });
+  }
+
+  // ---- 存草稿 ----
+
+  Future<bool> _saveDraft(DraftSaveTrigger trigger) async {
+    if (_isEmptyForm) return true;
+    if (_content.isEmpty) {
+      _showSnackBar('请先写点什么再保存草稿');
+      return false;
+    }
+    if (_uploader.hasBusyItem) {
+      _showSnackBar('图片还在上传中，请稍候再保存草稿');
+      return false;
+    }
+    if (_uploader.hasFailure) {
+      _showSnackBar('有图片上传失败，请重试或删除后再保存草稿');
+      return false;
+    }
+    setState(() {
+      _savingDraft = true;
+      _publishErrorMessage = null;
+    });
+    final signature = _mediaSignature();
+    try {
+      if (_draftPostId == null) {
+        final key = _idempotencyKey ??= _uuid.v4();
+        final draft = await _controller.repository.createPost(
+          CreatePostRequest(
+            content: _content,
+            category: _category,
+            status: PostStatus.draft,
+            media: _mediaAttachOrNull(),
+          ),
+          idempotencyKey: key,
+        );
+        _draftPostId = draft.id;
+        _draftVersion = draft.version;
+      } else {
+        final updated = await _controller.repository.updatePost(
+          _draftPostId!,
+          UpdatePostRequest(
+            version: _draftVersion!,
+            content: _content,
+            category: _category,
+            media: signature == _syncedMediaSignature
+                ? null
+                : _mediaAttachOrNull() ?? const <PostMediaAttachRequest>[],
+          ),
+        );
+        _draftVersion = updated.version;
+      }
+      _syncedMediaSignature = signature;
+      _fromDraft = true;
+      widget.analytics?.postDraftSaved(
+        trigger: trigger,
+        mediaCount: _uploader.items.length + _keptDraftMediaCount(signature),
+      );
+      if (mounted) setState(() => _draftSavedHint = true);
+      return true;
+    } on ApiException catch (error) {
+      if (mounted) _showSnackBar(draftSaveErrorMessage(error));
+      return false;
+    } finally {
+      if (mounted) setState(() => _savingDraft = false);
+    }
+  }
+
+  /// 「不保留」：已落服务端的草稿一并软删（`post_deleted` 触点）。
+  Future<void> _discardDraft() async {
+    final draftId = _draftPostId;
+    if (draftId == null) return;
+    try {
+      await _controller.repository.deletePost(draftId);
+      widget.analytics?.postDeleted();
+    } on ApiException {
+      // 删除失败不拦住离页（草稿留在服务端，下次进页可恢复）。
+    }
+  }
+
+  // ---- 离页 ----
+
+  Future<void> _onCancel() async {
+    if (_publishing || _savingDraft) return;
+    if (_isEmptyForm) {
+      Navigator.of(context).pop(false);
+      return;
+    }
+    final choice = await showDialog<_ExitChoice>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('保留草稿？'),
+        content: const Text('保留后下次进入发布页可继续编辑。'),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context, _ExitChoice.keepEditing),
+            child: const Text('继续编辑'),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(context, _ExitChoice.discard),
+            child: const Text('不保留'),
+          ),
+          FilledButton(
+            onPressed: () => Navigator.pop(context, _ExitChoice.keep),
+            child: const Text('保留'),
+          ),
+        ],
+      ),
+    );
+    if (!mounted || choice == null || choice == _ExitChoice.keepEditing) return;
+    if (choice == _ExitChoice.discard) {
+      await _discardDraft();
+      if (!mounted) return;
+      Navigator.of(context).pop(false);
+      return;
+    }
+    final saved = await _saveDraft(DraftSaveTrigger.onExit);
+    if (!mounted || !saved) return;
+    Navigator.of(context).pop(false);
+  }
+
+  void _showSnackBar(String message) {
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(SnackBar(content: Text(message)));
+  }
+
+  // ---- 渲染 ----
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return PopScope(
+      canPop: _isEmptyForm && !_publishing && !_savingDraft,
+      onPopInvokedWithResult: (didPop, _) {
+        if (!didPop) unawaited(_onCancel());
+      },
+      child: Scaffold(
+        appBar: AppBar(
+          leadingWidth: 76,
+          leading: Center(
+            child: TextButton(
+              onPressed: _publishing ? null : () => unawaited(_onCancel()),
+              style: TextButton.styleFrom(foregroundColor: AppColors.ink),
+              child: const Text('取消'),
+            ),
+          ),
+          title: const Text('发布动态'),
+          actions: [
+            TextButton(
+              onPressed: _publishing || _savingDraft
+                  ? null
+                  : () => unawaited(_saveDraft(DraftSaveTrigger.manual)),
+              child: const Text('存草稿'),
+            ),
+            const SizedBox(width: 4),
+            FilledButton(
+              style: FilledButton.styleFrom(
+                minimumSize: const Size(0, 40),
+                padding: const EdgeInsets.symmetric(horizontal: 20),
+              ),
+              onPressed: _canPublish ? () => unawaited(_publish()) : null,
+              child: _publishing
+                  ? const SizedBox.square(
+                      dimension: 18,
+                      child: CircularProgressIndicator(
+                        strokeWidth: 2,
+                        color: Colors.white,
+                      ),
+                    )
+                  : const Text('发布'),
+            ),
+            const SizedBox(width: 12),
+          ],
+        ),
+        body: ListView(
+          padding: const EdgeInsets.fromLTRB(16, 12, 16, 28),
+          children: [
+            if (_restoredBannerVisible) ...[
+              _RestoredDraftBanner(onClear: _clearRestoredDraft),
+              const SizedBox(height: 12),
+            ],
+            if (_publishErrorMessage != null) ...[
+              InlineErrorBanner(message: _publishErrorMessage!),
+              if (_draftPreservedHint) ...[
+                const SizedBox(height: 6),
+                const Text(
+                  '草稿已保存，可稍后继续发布',
+                  style: TextStyle(fontSize: 12, color: AppColors.inkSoft),
+                ),
+              ],
+              const SizedBox(height: 12),
+            ],
+            if (_draftSavedHint) ...[
+              const Text(
+                '已保存草稿 ✓',
+                style: TextStyle(fontSize: 12, color: AppColors.inkSoft),
+              ),
+              const SizedBox(height: 12),
+            ],
+            ..._mediaSection(),
+            if (_uploader.hasBusyItem) ...[
+              const SizedBox(height: 8),
+              _UploadSummaryBar(
+                progress: _uploader.overallProgress,
+                readyCount: _uploader.readyCount,
+                total: _uploader.items.length,
+              ),
+            ],
+            const SizedBox(height: 16),
+            TextField(
+              controller: _contentController,
+              minLines: 6,
+              maxLines: null,
+              maxLength: _maxContentLength,
+              keyboardType: TextInputType.multiline,
+              decoration: const InputDecoration(
+                hintText: '分享毛孩子的日常，或向宠友求助…',
+                alignLabelWithHint: true,
+              ),
+            ),
+            const SizedBox(height: 12),
+            Text('分类', style: theme.textTheme.bodySmall),
+            const SizedBox(height: 7),
+            Wrap(
+              spacing: 8,
+              children: [
+                for (final entry in const [
+                  (PostCategory.general, '日常分享'),
+                  (PostCategory.help, '求助'),
+                ])
+                  ChoiceChip(
+                    label: Text(entry.$2),
+                    selected: _category == entry.$1,
+                    onSelected: (_) {
+                      _markDirty();
+                      setState(() => _category = entry.$1);
+                    },
+                  ),
+              ],
+            ),
+            const SizedBox(height: 12),
+            ListTile(
+              contentPadding: EdgeInsets.zero,
+              leading: const Icon(Icons.location_on_outlined),
+              title: const Text('添加位置（选填）'),
+              trailing: const Icon(Icons.chevron_right),
+              onTap: () => _showSnackBar('位置功能即将上线'),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  List<Widget> _mediaSection() {
+    final showDraftMedia = _uploader.isEmpty && _draftMedia.isNotEmpty;
+    return [
+      PostMediaEditGrid(
+        items: _uploader.items,
+        canAdd: _uploader.remainingSlots > 0,
+        onAdd: _uploader.isPicking ? null : () => unawaited(_pickImages()),
+        onRemove: _uploader.remove,
+        onRetry: _uploader.retry,
+      ),
+      if (showDraftMedia) ...[
+        const SizedBox(height: 8),
+        Text(
+          '草稿已含 ${_draftMedia.length} 张图片（发布时保留；重新选图将整组替换）',
+          style: const TextStyle(fontSize: 12, color: AppColors.inkSoft),
+        ),
+      ],
+    ];
+  }
+}
+
+enum _ExitChoice { keep, discard, keepEditing }
+
+/// 「已恢复上次草稿」提示条（05 §2.3：surfaceTint 底、圆角 sm12）。
+class _RestoredDraftBanner extends StatelessWidget {
+  const _RestoredDraftBanner({required this.onClear});
+
+  final VoidCallback onClear;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.fromLTRB(12, 4, 4, 4),
+      decoration: const BoxDecoration(
+        color: AppColors.surfaceTint,
+        borderRadius: BorderRadius.all(Radius.circular(AppRadius.sm)),
+      ),
+      child: Row(
+        children: [
+          const Expanded(
+            child: Text(
+              '已恢复上次草稿',
+              style: TextStyle(fontSize: 12, color: AppColors.primaryDark),
+            ),
+          ),
+          TextButton(onPressed: onClear, child: const Text('清空')),
+        ],
+      ),
+    );
+  }
+}
+
+/// 页级上传汇总条（05 §3.3 末段：线性进度 + 「正在上传 n/N」）。
+class _UploadSummaryBar extends StatelessWidget {
+  const _UploadSummaryBar({
+    required this.progress,
+    required this.readyCount,
+    required this.total,
+  });
+
+  final double progress;
+  final int readyCount;
+  final int total;
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Text(
+          '正在上传 $readyCount/$total',
+          style: const TextStyle(fontSize: 12, color: AppColors.inkSoft),
+        ),
+        const SizedBox(width: 10),
+        Expanded(
+          child: LinearProgressIndicator(
+            value: progress,
+            minHeight: 4,
+            color: AppColors.primaryStrong,
+            backgroundColor: AppColors.surfaceTint,
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/features/create/create_page.dart

@@ -7,15 +7,23 @@ import 'package:patbond_flutter/widgets/common.dart';
 
 enum CreationMode { image, video }
 
+/// 创作 Tab。
+///
+/// **AI 生成模拟（700/650/500ms 假延时、风格/模型/分辨率设置、结果卡）
+/// 属 M4 范围，T3-17 原样保留**；社区发布半边自 T3-17 起改由真实发布页
+/// （`PostComposePage`，push 全屏）承担——本页顶部「发布动态」入口即其
+/// 入口（entryPoint=create_tab），`AppState.publishPost` demo 发布流退役。
 class CreatePage extends StatefulWidget {
   const CreatePage({
     required this.appState,
-    required this.onPublished,
+    required this.onOpenCompose,
     super.key,
   });
 
   final AppState appState;
-  final ValueChanged<PostModel> onPublished;
+
+  /// 真实发布页入口（主壳 push，发布成功后回首页 Feed 刷新）。
+  final VoidCallback onOpenCompose;
 
   @override
   State<CreatePage> createState() => _CreatePageState();
@@ -111,36 +119,13 @@ class _CreatePageState extends State<CreatePage> {
     setState(() => tags = [...tags, value]);
   }
 
+  /// AI 作品的社区发布留待 M4：AI 结果是生成图（无本地文件、无 media
+  /// asset），走不了两步上传，故不接真实发布链路；demo 发布流（写
+  /// `AppState.posts`）随 T3-17 退役，此处只余占位提示。
   void publish() {
-    if (resultUrl == null || titleController.text.trim().isEmpty) {
+    ScaffoldMessenger.of(context).showSnackBar(
-      ScaffoldMessenger.of(
+      const SnackBar(content: Text('AI 作品发布随 AI 创作能力上线（M4）；发布普通动态请用上方「发布动态」')),
-        context,
-      ).showSnackBar(const SnackBar(content: Text('请先完成生成并填写标题')));
-      return;
-    }
-    final post = PostModel(
-      id: 'post_user_${DateTime.now().millisecondsSinceEpoch}',
-      authorName: '萌宠新手（我）',
-      authorAvatar: userAvatar,
-      time: '刚刚',
-      breedTag: 'AI创作',
-      content:
-          '${titleController.text.trim()}\n\n${contentController.text.trim()}',
-      mainImage: resultUrl!,
-      likes: 1,
-      tags: [...tags, mode == CreationMode.image ? 'AI生图' : 'AI视频'],
-      comments: const [],
-      hasLiked: true,
     );
-    widget.appState.publishPost(post);
-    setState(() {
-      uploaded = false;
-      resultUrl = null;
-      generationStep = 0;
-      titleController.clear();
-      contentController.clear();
-    });
-    widget.onPublished(post);
   }
 
   @override
@@ -148,6 +133,8 @@ class _CreatePageState extends State<CreatePage> {
     return ListView(
       padding: const EdgeInsets.fromLTRB(16, 12, 16, 28),
       children: [
+        _ComposeEntryCard(onTap: widget.onOpenCompose),
+        const SizedBox(height: 18),
         SegmentedButton<CreationMode>(
           segments: const [
             ButtonSegment(
@@ -402,6 +389,35 @@ class _CreatePageState extends State<CreatePage> {
   }
 }
 
+/// 真实发布入口（T3-17）：本页其余部分是 AI 创作模拟（M4），社区发帖
+/// 走这里 push 的发布页。
+class _ComposeEntryCard extends StatelessWidget {
+  const _ComposeEntryCard({required this.onTap});
+
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return SectionCard(
+      padding: EdgeInsets.zero,
+      child: ListTile(
+        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 6),
+        leading: const CircleAvatar(
+          backgroundColor: AppColors.surfaceTint,
+          child: Icon(Icons.edit_outlined, color: AppColors.primary),
+        ),
+        title: const Text(
+          '发布动态',
+          style: TextStyle(fontWeight: FontWeight.w800),
+        ),
+        subtitle: const Text('写点文字、配上照片，分享给宠友'),
+        trailing: const Icon(Icons.chevron_right),
+        onTap: onTap,
+      ),
+    );
+  }
+}
+
 class _UploadCard extends StatelessWidget {
   const _UploadCard({
     required this.uploaded,

lib/features/home/home_page.dart

@@ -10,6 +10,7 @@ import 'package:patbond_flutter/features/community/community_display.dart';
 import 'package:patbond_flutter/features/community/community_models.dart';
 import 'package:patbond_flutter/features/community/feed_analytics.dart';
 import 'package:patbond_flutter/features/community/feed_exposure.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
 import 'package:patbond_flutter/models/models.dart';
 import 'package:patbond_flutter/state/app_state.dart';
 import 'package:patbond_flutter/widgets/common.dart';
@@ -17,15 +18,28 @@ import 'package:patbond_flutter/widgets/common.dart';
 enum HomeSegment { feed, services }
 
 /// 首页 Tab：Feed 段自 T3-14 起消费 [CommunityController] 真实数据
-/// （四态 + 游标翻页 + 聚合曝光埋点）；天气条/问候卡/搜索/服务段与
+/// （四态 + 游标翻页 + 聚合曝光埋点）；问候语自 T3.5-10 起用真实展示名。
-/// `_StoryRow` 家具保留 demo 形态（03 号评估 §1.1 判定）。
+///
+/// **刻意保留的 demo 占位**（ADR-022 决策 D3.5-1 钉死范围，留待对应里程碑；
+/// 在此登记以免实测重复反馈）：
+/// - **天气条与地区选择**（[_WeatherStatusBar] / [_AreaPickerSheet] /
+///   [_WeatherDetailsSheet]）：需接外部天气服务（含 API key 与配额管理），
+///   不属本迭代。
+/// - **story 环的「柴犬圈 / 猫咪圈 / 救助站」**（[_StoryRow]）：实为话题，
+///   ADR-018 已把话题剪出 M3 范围；环内「发布」是真入口。
+/// - **促销卡「新用户首单立减 ¥20」**（[_PromoCard]）：属 M5 服务域
+///   （优惠/订单能力尚不存在）。
+/// - **搜索框与「本地服务」段**：搜索只过滤已加载页（契约无检索端点）；
+///   服务商数据为 demo 常量，同属 M5。
 class HomePage extends StatefulWidget {
   const HomePage({
     required this.appState,
     required this.communityController,
     required this.onOpenServices,
-    required this.onOpenCreate,
+    required this.onOpenCompose,
     super.key,
+    this.profileController,
+    this.onOpenPost,
     this.feedAnalytics,
     this.isActive = true,
   });
@@ -35,8 +49,19 @@ class HomePage extends StatefulWidget {
   /// Feed 数据源（Tab 级单例，app.dart 装配注入）。
   final CommunityController communityController;
 
+  /// 展示名数据源（T3.5-10）：与资料页**共用同一控制器**，
+  /// 故改昵称后两处一起变，且全程只发一次 `/me`。
+  /// 未注入或资料尚未到手时问候语不带名字（不编造「豆豆」这类假名）。
+  final ProfileController? profileController;
+
   final ValueChanged<bool> onOpenServices;
-  final VoidCallback onOpenCreate;
+
+  /// 发布页入口（T3-17：story 环「发布」与空态 CTA 均 push 真实发布页，
+  /// entryPoint=feed；创作 Tab 的 AI 模拟不再是社区发帖入口）。
+  final VoidCallback onOpenCompose;
+
+  /// 帖子详情导航（T3-15 接通；主壳 push PostDetailPage）。
+  final ValueChanged<String>? onOpenPost;
 
   /// feed 域埋点（feed_viewed 聚合曝光 + feed_load_failed）。
   final FeedAnalytics? feedAnalytics;
@@ -72,6 +97,8 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
   void initState() {
     super.initState();
     WidgetsBinding.instance.addObserver(this);
+    // 展示名变化（资料首次到手 / 用户改昵称后返回）即重建问候语。
+    widget.profileController?.addListener(_onProfileChanged);
     // 主壳挂载即预取（pets 先例）；重登后控制器已 reset 回 initial。
     // 首屏自动预取不计入浏览段 refreshCount（非用户动作）。
     if (_feed.phase == FeedPhase.initial) {
@@ -80,6 +107,10 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
     if (_feedSurfaceVisible) _startSegment();
   }
 
+  void _onProfileChanged() {
+    if (mounted) setState(() {});
+  }
+
   @override
   void didUpdateWidget(HomePage oldWidget) {
     super.didUpdateWidget(oldWidget);
@@ -107,6 +138,7 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
   @override
   void dispose() {
     _settleSegment();
+    widget.profileController?.removeListener(_onProfileChanged);
     WidgetsBinding.instance.removeObserver(this);
     super.dispose();
   }
@@ -231,14 +263,6 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
     }
   }
 
-  /// T3-14 取舍：详情页数据层重写属 T3-15，demo 详情页无法按服务端
-  /// postId 渲染真实帖，故整卡点按先提示、互动按钮为纯展示禁用态。
-  void _showDetailPending() {
-    ScaffoldMessenger.of(context)
-      ..hideCurrentSnackBar()
-      ..showSnackBar(const SnackBar(content: Text('帖子详情正在接入真实数据，敬请期待')));
-  }
-
   /// 搜索词过滤（demo 交互保留：只过滤已加载的多页缓存，不发检索请求；
   /// 契约 v1.3.0 无搜索端点）。
   List<FeedCard> get _visibleCards {
@@ -309,6 +333,17 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
     return ListenableBuilder(
       listenable: _feed,
       builder: (context, _) {
+        // 点赞/收藏对账失败的一次性 SnackBar（§3.5 回滚提示；与详情页
+        // 共用 controller 的 toggleError 消费口，先消费者清空）。
+        if (_feed.toggleError != null) {
+          _feed.clearToggleError();
+          WidgetsBinding.instance.addPostFrameCallback((_) {
+            if (!mounted) return;
+            ScaffoldMessenger.of(
+              context,
+            ).showSnackBar(const SnackBar(content: Text('操作失败，请重试')));
+          });
+        }
         // ready 后（含翻页追加）补一次可见性扫描：无滚动也能记首屏曝光。
         if (_viewSegment != null && _feed.phase == FeedPhase.ready) {
           _scheduleVisibilityScan();
@@ -331,7 +366,10 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
                 const SizedBox(height: 12),
                 _PetGreetingCard(
                   greeting: greeting,
-                  petName: widget.appState.pet.name,
+                  // T3.5-10：真实展示名（`nickname ?? username`，与资料页
+                  // 同源同规则）取代硬编码的 demo 宠物名「豆豆」。
+                  // 资料未到手时为 null → 只问候不称名，不编造假名。
+                  displayName: widget.profileController?.displayName,
                   petAvatar: widget.appState.pet.avatarUrl,
                   advice: widget.appState.locationWeather.petAdvice,
                 ),
@@ -363,7 +401,7 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
                 ),
                 const SizedBox(height: 18),
                 if (segment == HomeSegment.feed) ...[
-                  _StoryRow(onCreate: widget.onOpenCreate),
+                  _StoryRow(onCreate: widget.onOpenCompose),
                   const SizedBox(height: 18),
                   _PromoCard(onTap: () => widget.onOpenServices(true)),
                   const SizedBox(height: 18),
@@ -452,7 +490,7 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
               title: '还没有动态',
               description: '关注的毛孩子们还没发帖，去逛逛话题吧',
               ctaLabel: '发布第一条',
-              onCtaPressed: widget.onOpenCreate,
+              onCtaPressed: widget.onOpenCompose,
             ),
           ];
         }
@@ -467,7 +505,15 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
               padding: const EdgeInsets.only(bottom: 16),
               child: KeyedSubtree(
                 key: _cardKeys.putIfAbsent(card.id, GlobalKey.new),
-                child: PostCard(card: card, onTap: _showDetailPending),
+                // 点赞/收藏经共享 ToggleSync（source=feed 缺省）；整卡与
+                // 评论钮进详情（T3-15 导航接通，T3-14 的占位提示移除）。
+                child: PostCard(
+                  card: card,
+                  onTap: () => widget.onOpenPost?.call(card.id),
+                  onCommentTap: () => widget.onOpenPost?.call(card.id),
+                  onLikeTap: () => _feed.toggleLike(card.id),
+                  onBookmarkTap: () => _feed.toggleBookmark(card.id),
+                ),
               ),
             ),
           // 搜索过滤中不渲染尾部（过滤只作用于已加载页，翻页语义混淆）。
@@ -534,6 +580,8 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
   }
 }
 
+/// **刻意保留的 demo 占位**（ADR-022 决策 D3.5-1）：定位与天气需接外部
+/// 服务（含 API key 与配额管理），本迭代不做；地区选择只改本机 demo 数据。
 class _WeatherStatusBar extends StatelessWidget {
   const _WeatherStatusBar({
     required this.weather,
@@ -623,14 +671,23 @@ class _WeatherStatusBar extends StatelessWidget {
 class _PetGreetingCard extends StatelessWidget {
   const _PetGreetingCard({
     required this.greeting,
-    required this.petName,
+    required this.displayName,
     required this.petAvatar,
     required this.advice,
   });
 
   final String greeting;
-  final String petName;
+
+  /// 当前用户展示名；null 即资料未到手（问候语退化为不称名形态）。
+  final String? displayName;
+
+  /// **刻意保留的 demo 占位**：卡右侧大图仍是 demo 宠物图（用户头像与宠物
+  /// 头像本单已真实化，但「首页该显示哪只宠物」需要一个『当前宠物』概念，
+  /// 尚不存在——不在 ADR-022 范围内）。
   final String petAvatar;
+
+  /// **刻意保留的 demo 占位**：养宠建议来自 demo 天气数据（外部天气服务
+  /// 未接，ADR-022 决策 D3.5-1）。
   final String advice;
 
   @override
@@ -673,7 +730,9 @@ class _PetGreetingCard extends StatelessWidget {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 Text(
-                  '$greeting，$petName 👋',
+                  displayName == null
+                      ? '$greeting 👋'
+                      : '$greeting，$displayName 👋',
                   maxLines: 1,
                   overflow: TextOverflow.ellipsis,
                   style: const TextStyle(
@@ -868,6 +927,9 @@ Color _weatherColor(WeatherCondition condition) {
   };
 }
 
+/// **刻意保留的 demo 占位**（ADR-022 决策 D3.5-1）：「柴犬圈 / 猫咪圈 /
+/// 救助站」三个圈子实为**话题**，ADR-018 已把话题能力剪出 M3 范围，
+/// 留待话题里程碑。首格「发布」是真入口（T3-17 起 push 真实发布页）。
 class _StoryRow extends StatelessWidget {
   const _StoryRow({required this.onCreate});
 
@@ -938,6 +1000,8 @@ class _StoryRow extends StatelessWidget {
   }
 }
 
+/// **刻意保留的 demo 占位**（ADR-022 决策 D3.5-1）：促销文案与「去使用」
+/// 属 **M5 服务域**——优惠券与订单能力尚不存在，当前点按只跳本地服务段。
 class _PromoCard extends StatelessWidget {
   const _PromoCard({required this.onTap});
 

lib/features/main/main_shell_page.dart

@@ -1,9 +1,16 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:patbond_flutter/analytics/analytics_page_name.dart';
 import 'package:patbond_flutter/analytics/page_view_tracker.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
 import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
 import 'package:patbond_flutter/features/community/feed_analytics.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
+import 'package:patbond_flutter/features/community/post_compose_page.dart';
 import 'package:patbond_flutter/features/create/create_page.dart';
 import 'package:patbond_flutter/features/home/home_page.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
@@ -11,9 +18,9 @@ import 'package:patbond_flutter/features/pets/pet_analytics.dart';
 import 'package:patbond_flutter/features/pets/pets_controller.dart';
 import 'package:patbond_flutter/features/pets/pets_page.dart';
 import 'package:patbond_flutter/features/post/post_detail_page.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
 import 'package:patbond_flutter/features/profile/profile_page.dart';
 import 'package:patbond_flutter/features/services/services_page.dart';
-import 'package:patbond_flutter/models/models.dart';
 import 'package:patbond_flutter/state/app_state.dart';
 import 'package:patbond_flutter/widgets/common.dart';
 
@@ -22,10 +29,16 @@ class MainShellPage extends StatefulWidget {
     required this.appState,
     required this.petsController,
     required this.communityController,
+    required this.profileController,
     super.key,
+    this.currentUserId,
     this.petAnalytics,
     this.healthRecordAnalytics,
     this.feedAnalytics,
+    this.interactionAnalytics,
+    this.postAnalytics,
+    this.mediaUploaderFactory,
+    this.avatarUploaderBuilder,
     this.pageViewTracker,
     this.onLogout,
   });
@@ -38,6 +51,12 @@ class MainShellPage extends StatefulWidget {
   /// 社区状态（T3-12 数据层；首页 Feed segment 数据源，T3-14 接线）。
   final CommunityController communityController;
 
+  /// 本人资料与社区数字（T3.5-08）；资料 Tab 与首页问候语共用。
+  final ProfileController profileController;
+
+  /// 当前登录用户 id（详情页评论删除入口 / 关注钮自见性的 UI 判定）。
+  final String? currentUserId;
+
   /// pet 域埋点强类型封装（建宠漏斗三事件）。
   final PetAnalytics? petAnalytics;
 
@@ -47,6 +66,18 @@ class MainShellPage extends StatefulWidget {
   /// feed 域埋点（T3-14 聚合曝光 + 加载失败）。
   final FeedAnalytics? feedAnalytics;
 
+  /// 互动域埋点（T3-16 评论成败对 + 关注对；详情页消费）。
+  final CommunityInteractionAnalytics? interactionAnalytics;
+
+  /// post 域埋点（T3-17 发布漏斗五事件 + 媒体三段；发布页消费）。
+  final PostAnalytics? postAnalytics;
+
+  /// 发布页 [MediaUploader] 构造口（桌面实测 / 测试替换选图与压缩层）。
+  final MediaUploaderFactory? mediaUploaderFactory;
+
+  /// 头像上传构造口（T3.5-08/09：资料编辑页与宠物详情页）。
+  final AvatarUploaderBuilder? avatarUploaderBuilder;
+
   /// Tab 曝光补点（IndexedStack 切换不产生路由事件，03 号评估 §3.2）。
   final PageViewTracker? pageViewTracker;
 
@@ -93,16 +124,44 @@ class _MainShellPageState extends State<MainShellPage> {
     widget.pageViewTracker?.reportTab(_tabPages[3]);
   }
 
-  void openPost(PostModel post) {
+  /// 帖子详情（T3-15：真实数据整页；Feed 卡片与详情共享
+  /// communityController，互动状态跨页一致）。
+  void openPost(String postId) {
     Navigator.of(context).push(
       MaterialPageRoute<void>(
         settings: RouteSettings(name: AnalyticsPageName.postDetail.pageName),
-        builder: (context) =>
+        builder: (context) => PostDetailPage(
-            PostDetailPage(appState: widget.appState, postId: post.id),
+          controller: widget.communityController,
+          postId: postId,
+          currentUserId: widget.currentUserId,
+          analytics: widget.interactionAnalytics,
+        ),
       ),
     );
   }
 
+  /// 发布页（T3-17：真实发布链路）。发布成功后回首页 Feed 并整体刷新，
+  /// 新帖按 `(published_at DESC, id DESC)` 落在首位（跨客户端同一序）。
+  Future<void> openCompose(PostEntryPoint entryPoint) async {
+    final published = await Navigator.of(context).push<bool>(
+      MaterialPageRoute<bool>(
+        settings: RouteSettings(name: AnalyticsPageName.postForm.pageName),
+        builder: (context) => PostComposePage(
+          controller: widget.communityController,
+          entryPoint: entryPoint,
+          analytics: widget.postAnalytics,
+          uploaderFactory: widget.mediaUploaderFactory,
+        ),
+      ),
+    );
+    if (!mounted || published != true) return;
+    selectTab(0);
+    unawaited(widget.communityController.refresh());
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(const SnackBar(content: Text('已发布，去首页看看吧 🐾')));
+  }
+
   @override
   Widget build(BuildContext context) {
     return AnimatedBuilder(
@@ -118,30 +177,34 @@ class _MainShellPageState extends State<MainShellPage> {
           HomePage(
             appState: widget.appState,
             communityController: widget.communityController,
+            profileController: widget.profileController,
             feedAnalytics: widget.feedAnalytics,
             isActive: currentIndex == 0,
             onOpenServices: openServices,
-            onOpenCreate: () => selectTab(1),
+            onOpenCompose: () => openCompose(PostEntryPoint.feed),
+            onOpenPost: openPost,
           ),
           CreatePage(
             appState: widget.appState,
-            onPublished: (post) {
+            // T3-17：发布半边已真实化（发布页 push），AI 生成模拟原样留 M4。
-              selectTab(0);
+            onOpenCompose: () => openCompose(PostEntryPoint.createTab),
-              WidgetsBinding.instance.addPostFrameCallback(
-                (_) => openPost(post),
-              );
-            },
           ),
           PetsPage(
             controller: widget.petsController,
             analytics: widget.petAnalytics,
             healthAnalytics: widget.healthRecordAnalytics,
+            avatarUploaderBuilder: widget.avatarUploaderBuilder,
           ),
           ServicesPage(
             showPersonal: showPersonalServices,
             locationWeather: widget.appState.locationWeather,
           ),
-          ProfilePage(appState: widget.appState, onLogout: widget.onLogout),
+          ProfilePage(
+            appState: widget.appState,
+            controller: widget.profileController,
+            avatarUploaderBuilder: widget.avatarUploaderBuilder,
+            onLogout: widget.onLogout,
+          ),
         ];
 
         return Scaffold(

lib/features/pets/care_reminder_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/primary_button.dart';
@@ -265,14 +266,22 @@ class _CareReminderFormPageState extends State<CareReminderFormPage> {
                 _dueDate == null ? '未选择' : dateToJson(_dueDate!),
                 style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
               ),
-              trailing: const Icon(
+              trailing: AppDateFieldTrailing(
-                Icons.calendar_month_outlined,
+                firstDate: DateTime.now(),
-                color: AppColors.muted,
+                lastDate: DateTime(DateTime.now().year + 5),
+                enabled: !_submitting,
+                onToday: (value) {
+                  _markStarted();
+                  setState(() {
+                    _dueDate = value;
+                    _dueError = null;
+                  });
+                },
               ),
               enabled: !_submitting,
               onTap: () async {
                 final now = DateTime.now();
-                final value = await showDatePicker(
+                final value = await pickAppDate(
                   context: context,
                   initialDate: _dueDate ?? now,
                   firstDate: now,

lib/features/pets/care_reminders_page.dart

@@ -3,6 +3,7 @@ import 'package:patbond_flutter/analytics/analytics_page_name.dart';
 import 'package:patbond_flutter/core/navigation/fade_route.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/record_type_dot.dart';
@@ -484,7 +485,7 @@ class _CompleteDialogState extends State<_CompleteDialog> {
             ),
             onTap: () async {
               final now = DateTime.now();
-              final value = await showDatePicker(
+              final value = await pickAppDate(
                 context: context,
                 initialDate: _date,
                 firstDate: DateTime(1990),
@@ -494,6 +495,11 @@ class _CompleteDialogState extends State<_CompleteDialog> {
                 setState(() => _date = value);
               }
             },
+            trailing: AppDateFieldTrailing(
+              firstDate: DateTime(1990),
+              lastDate: DateTime.now(),
+              onToday: (value) => setState(() => _date = value),
+            ),
           ),
         ],
       ),

lib/features/pets/health_event_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/primary_button.dart';
@@ -269,14 +270,19 @@ class _HealthEventFormPageState extends State<HealthEventFormPage> {
                 dateToJson(_occurredDate),
                 style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
               ),
-              trailing: const Icon(
+              trailing: AppDateFieldTrailing(
-                Icons.calendar_month_outlined,
+                firstDate: DateTime(1990),
-                color: AppColors.muted,
+                lastDate: DateTime.now(),
+                enabled: !_submitting,
+                onToday: (value) {
+                  _markStarted();
+                  setState(() => _occurredDate = value);
+                },
               ),
               enabled: !_submitting,
               onTap: () async {
                 final now = DateTime.now();
-                final value = await showDatePicker(
+                final value = await pickAppDate(
                   context: context,
                   initialDate: _occurredDate,
                   firstDate: DateTime(1990),

lib/features/pets/health_record_display.dart

@@ -125,6 +125,27 @@ String healthEventMonthHeader(DateTime occurredAt) {
   return '${local.year} 年 ${local.month} 月';
 }
 
+/// 月度花费卡标签（M3.5-03）。
+///
+/// 根因备忘：卡片标签此前硬编码「本月花费」，用户无法自证「本月」到底是
+/// 哪个月——他把当月记录误录到 2026-04 后看到「本月花费 ¥0」，以为聚合坏了。
+/// 服务端 `summary.monthlyExpense.month` 本就返回 ISO year-month（如 `2026-09`，
+/// 按 `tz` 归月），直接展示即可自查，无需改后端。
+///
+/// [month] 形如 `2026-09`。窄卡（一行四卡）只放得下 4~5 个字，故取「9 月花费」
+/// 而非「2026-09 花费」；跨年（服务端归月的年份与设备当前年份不一致，如设备
+/// 已跨到 1 月而窗口仍是去年 12 月）时补年份消歧。解析失败退回「本月花费」。
+String monthlyExpenseCardLabel(String month, {DateTime? now}) {
+  final match = RegExp(r'^(\d{4})-(\d{2})$').firstMatch(month);
+  if (match == null) return '本月花费';
+  final year = int.parse(match.group(1)!);
+  final monthNo = int.parse(match.group(2)!);
+  if (monthNo < 1 || monthNo > 12) return '本月花费';
+  final currentYear = (now ?? DateTime.now()).year;
+  if (year != currentYear) return '$year/$monthNo 花费';
+  return '$monthNo 月花费';
+}
+
 /// 设备时区 → summary `tz` 参数（契约接受固定偏移形如 `+08:00`；
 /// Flutter 无 IANA 名可取，固定偏移语义等价——只作用于月度窗口）。
 String tzOffsetQueryValue(Duration offset) {

lib/features/pets/pet_detail_page.dart

@@ -2,10 +2,12 @@ import 'package:flutter/material.dart';
 import 'package:patbond_flutter/core/navigation/fade_route.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
 import 'package:patbond_flutter/core/widgets/record_type_dot.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
 import 'package:patbond_flutter/features/pets/care_reminders_page.dart';
 import 'package:patbond_flutter/features/pets/health_events_page.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
@@ -43,6 +45,7 @@ class PetDetailPage extends StatefulWidget {
     super.key,
     this.analytics,
     this.healthAnalytics,
+    this.avatarUploaderBuilder,
   });
 
   final PetsController controller;
@@ -50,6 +53,10 @@ class PetDetailPage extends StatefulWidget {
   final PetAnalytics? analytics;
   final HealthRecordAnalytics? healthAnalytics;
 
+  /// 头像上传编排器构造口（T3.5-09）；null 即本次构建未装配上传能力，
+  /// 隐藏头像编辑入口（生产装配恒注入，见 `app.dart`）。
+  final AvatarUploaderBuilder? avatarUploaderBuilder;
+
   @override
   State<PetDetailPage> createState() => _PetDetailPageState();
 }
@@ -186,6 +193,109 @@ class _PetDetailPageState extends State<PetDetailPage> {
   /// 记录写入权限档 WRITE（owner + caregiver）；viewer 隐藏录入入口。
   bool get _canWriteRecords => _pet?.myRole != PetRole.viewer;
 
+  /// 头像写入权限档 **WRITE**（ADR-022 决策 D3.5-3：头像属日常照护信息，
+  /// 与体重/疫苗同档，owner + caregiver 均可改；viewer 只读）。
+  ///
+  /// 注意这与 [_canEdit]（MANAGE，仅 owner）**刻意不同**：服务端按「本次
+  /// 请求触及了哪些字段」定档——只带 avatarAssetId 走 WRITE，碰任一资料
+  /// 字段即 MANAGE。故这里只发纯头像 PATCH，不夹带任何资料字段。
+  bool get _canEditAvatar =>
+      _phase == _DetailPhase.ready &&
+      _pet?.myRole != PetRole.viewer &&
+      widget.avatarUploaderBuilder != null;
+
+  /// 头像入口：已有头像时先给「更换 / 移除」二选一，没有则直接拉起上传。
+  Future<void> _onAvatarTap() async {
+    final pet = _pet;
+    if (pet == null || !_canEditAvatar) return;
+    if (pet.avatarUrl == null) {
+      await _uploadAvatar();
+      return;
+    }
+    final action = await showModalBottomSheet<String>(
+      context: context,
+      showDragHandle: true,
+      builder: (context) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            ListTile(
+              leading: const Icon(Icons.photo_camera_outlined),
+              title: const Text('更换头像'),
+              onTap: () => Navigator.pop(context, 'replace'),
+            ),
+            ListTile(
+              leading: const Icon(
+                Icons.delete_outline,
+                color: AppColors.errorDark,
+              ),
+              title: const Text(
+                '移除头像',
+                style: TextStyle(color: AppColors.errorDark),
+              ),
+              onTap: () => Navigator.pop(context, 'clear'),
+            ),
+          ],
+        ),
+      ),
+    );
+    if (!mounted || action == null) return;
+    if (action == 'replace') {
+      await _uploadAvatar();
+    } else {
+      // 三态「显式 null」= 清除头像（缺省是「不改」，两者在 JSON 上不同）。
+      await _patchAvatar(const PatchField<String>.clear(), '已移除头像');
+    }
+  }
+
+  Future<void> _uploadAvatar() async {
+    final builder = widget.avatarUploaderBuilder;
+    if (builder == null) return;
+    final assetId = await showAvatarUploadSheet(
+      context,
+      builder: builder,
+      // 用途即引用侧的类型检查：帖图或用户头像挂到宠物上会被答 404/40405。
+      purpose: MediaPurpose.petAvatar,
+    );
+    if (assetId == null || !mounted) return;
+    await _patchAvatar(PatchField<String>.value(assetId), '头像已更新');
+  }
+
+  /// 纯头像 PATCH：请求体只有 `version` + `avatarAssetId`，**不带任何资料
+  /// 字段**——夹带资料字段会把权限档从 WRITE 抬到 MANAGE，caregiver 立刻
+  /// 403（服务端刻意按更严的一半判，堵「夹带改名」）。
+  Future<void> _patchAvatar(PatchField<String> intent, String okMessage) async {
+    final pet = _pet;
+    if (pet == null) return;
+    try {
+      final updated = await widget.controller.updatePet(
+        pet.id,
+        UpdatePetRequest(version: pet.version, avatarAssetId: intent),
+      );
+      if (!mounted) return;
+      setState(() {
+        _pet = updated;
+        _phase = _DetailPhase.ready;
+      });
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(okMessage)));
+    } on PetVersionConflictException catch (error) {
+      // 40902：他人已改过这行。重取档案拿新 version，让用户自行决定是否重来
+      // （不静默重放——头像是用户可见的覆盖操作，不该自动生效两次）。
+      if (!mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(petAvatarSaveErrorMessage(error))));
+      await _load();
+    } on ApiException catch (error) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(petAvatarSaveErrorMessage(error))));
+    }
+  }
+
   Future<void> _openWeights(Pet pet) async {
     await Navigator.of(context).push(
       // 列表页页名不在字典 v2 枚举内（06 §5.2 验收 4：字典外不上报），
@@ -306,11 +416,14 @@ class _PetDetailPageState extends State<PetDetailPage> {
       children: [
         Column(
           children: [
+            // T3.5-09：头像展示真实预签名 URL（无图回退爪印占位）；铅笔角标
+            // 自此有功能——接 MediaUploader 上传 pet_avatar，WRITE 档可见。
             PetAvatar(
               size: PetAvatarSize.xl,
-              showEditBadge: _canEdit,
+              url: pet.avatarUrl,
-              onTap: _canEdit ? _openEdit : null,
+              showEditBadge: _canEditAvatar,
-              semanticLabel: _canEdit ? '编辑宠物资料' : null,
+              onTap: _canEditAvatar ? _onAvatarTap : null,
+              semanticLabel: _canEditAvatar ? '更换宠物头像' : null,
             ),
             const SizedBox(height: 12),
             Text(pet.name, style: Theme.of(context).textTheme.headlineSmall),
@@ -532,7 +645,9 @@ class _PetDetailPageState extends State<PetDetailPage> {
                   // monthlyExpense 恒非 null（契约）；金额整数分 → 元展示。
                   value: '¥${formatCentsAsYuan(expense.amountCents)}',
                   emphasized: expense.amountCents > 0,
-                  label: '本月花费',
+                  // M3.5-03：标签展示服务端归月的实际月份（此前硬编码
+                  // 「本月花费」，用户无法自证记录落在哪个月）。
+                  label: monthlyExpenseCardLabel(expense.month),
                   onTap: () => _openTimeline(pet),
                 ),
               ),
@@ -545,6 +660,13 @@ class _PetDetailPageState extends State<PetDetailPage> {
 
 /// 数据卡（正典 stat-card 形态）：图标 + 数值 15/w800 + 标签 12 inkSoft；
 /// 空态数值降级 inkSoft 常规字重（区分「有数据」与「空态」两种视觉）。
+///
+/// M3.5-03：可点卡（[onTap] 非空）右上角补 `chevron_right`——四张卡本都可点进
+/// 明细页，但此前无任何视觉提示，用户实测反馈不知道能点。提示形态沿用项目
+/// 既有可点行/卡（宠物列表卡、健康提醒卡、资料页设置行）的 `chevron_right`，
+/// 不自创。同时 [MergeSemantics] 把「数值 + 标签」并进 InkWell 的 button 节点，
+/// 读屏一次读全「¥0，9 月花费，按钮」，而不是两段孤立文字（tap 动作仍在
+/// InkWell 上，不用 `excludeSemantics` 以免连带丢掉可激活性）。
 class _SummaryCard extends StatelessWidget {
   const _SummaryCard({
     required this.icon,
@@ -564,35 +686,51 @@ class _SummaryCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Card(
+    return MergeSemantics(
-      child: InkWell(
+      child: Card(
-        onTap: onTap,
+        child: InkWell(
-        borderRadius: BorderRadius.circular(AppRadius.xl),
+          onTap: onTap,
-        child: Padding(
+          borderRadius: BorderRadius.circular(AppRadius.xl),
-          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 12),
+          child: Padding(
-          child: Column(
+            padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 12),
-            crossAxisAlignment: CrossAxisAlignment.start,
+            child: Column(
-            children: [
+              crossAxisAlignment: CrossAxisAlignment.start,
-              Icon(icon, size: 18, color: iconColor),
+              children: [
-              const SizedBox(height: 8),
+                Row(
-              Text(
+                  children: [
-                value,
+                    Icon(icon, size: 18, color: iconColor),
-                maxLines: 1,
+                    const Spacer(),
-                overflow: TextOverflow.ellipsis,
+                    if (onTap != null)
-                style: TextStyle(
+                      const Icon(
-                  color: emphasized ? AppColors.ink : AppColors.inkSoft,
+                        Icons.chevron_right,
-                  fontSize: emphasized ? 15 : 13,
+                        size: 16,
-                  fontWeight: emphasized ? FontWeight.w800 : FontWeight.w600,
+                        color: AppColors.muted,
+                      ),
+                  ],
                 ),
-              ),
+                const SizedBox(height: 8),
-              const SizedBox(height: 4),
+                Text(
-              Text(
+                  value,
-                label,
+                  maxLines: 1,
-                maxLines: 1,
+                  overflow: TextOverflow.ellipsis,
-                overflow: TextOverflow.ellipsis,
+                  style: TextStyle(
-                style: const TextStyle(color: AppColors.inkSoft, fontSize: 11),
+                    color: emphasized ? AppColors.ink : AppColors.inkSoft,
-              ),
+                    fontSize: emphasized ? 15 : 13,
-            ],
+                    fontWeight: emphasized ? FontWeight.w800 : FontWeight.w600,
+                  ),
+                ),
+                const SizedBox(height: 4),
+                Text(
+                  label,
+                  maxLines: 1,
+                  overflow: TextOverflow.ellipsis,
+                  style: const TextStyle(
+                    color: AppColors.inkSoft,
+                    fontSize: 11,
+                  ),
+                ),
+              ],
+            ),
           ),
         ),
       ),

lib/features/pets/pet_display.dart

@@ -54,3 +54,21 @@ String petLoadErrorMessage(ApiException? error) => switch (error) {
   ApiRateLimitException _ => '请求过于频繁，请稍后再试',
   _ => '加载失败，请稍后重试',
 };
+
+/// 宠物头像写入失败的文案（T3.5-09）。按契约 v1.4.0 为
+/// `PATCH /pets/{petId}` 新增的两格分层：
+///
+/// - 404/40405：asset 不存在 / 非本人 / 已删 / **用途不符**（帖图或用户头像
+///   当宠物头像）→ 引导重新上传，而不是「宠物不存在」（40401 才是那个）。
+/// - 422/42203：本人的 `pet_avatar` asset 仍在 uploading/failed → 可重试。
+/// - 403/40300：viewer 改头像（入口本已按 myRole 隐藏，此处兜底防越权构造）。
+/// - 409/40902：版本冲突 → 由调用方重取档案后重试。
+String petAvatarSaveErrorMessage(ApiException? error) => switch (error) {
+  ApiBusinessException(code: ApiCodes.mediaNotFound) => '头像已失效，请重新上传',
+  ApiBusinessException(code: ApiCodes.mediaNotReady) => '头像还没上传完，请稍后重试',
+  ApiBusinessException(code: ApiCodes.petAccessDenied) => '你没有修改该宠物头像的权限',
+  ApiBusinessException(code: ApiCodes.versionConflict) => '档案已被更新，请重新操作',
+  ApiNetworkException _ => '网络异常，请检查网络后重试',
+  ApiRateLimitException _ => '请求过于频繁，请稍后再试',
+  _ => '头像保存失败，请稍后重试',
+};

lib/features/pets/pet_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
@@ -659,14 +660,19 @@ class _PetFormPageState extends State<PetFormPage> {
         _birthDate == null ? '未填写' : dateToJson(_birthDate!),
         style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
       ),
-      trailing: const Icon(
+      trailing: AppDateFieldTrailing(
-        Icons.calendar_month_outlined,
+        firstDate: DateTime(1990),
-        color: AppColors.muted,
+        lastDate: DateTime.now(),
+        enabled: !_submitting,
+        onToday: (value) {
+          _markStarted();
+          setState(() => _birthDate = value);
+        },
       ),
       enabled: !_submitting,
       onTap: () async {
         final now = DateTime.now();
-        final value = await showDatePicker(
+        final value = await pickAppDate(
           context: context,
           initialDate: _birthDate ?? DateTime(now.year - 1, now.month),
           firstDate: DateTime(1990),

lib/features/pets/pet_models.dart

@@ -1,8 +1,11 @@
-/// pets 域响应 / 请求模型（接口契约冻结稿 openapi.yaml v1.2.0，
+/// pets 域响应 / 请求模型（接口契约冻结稿 openapi.yaml v1.4.0，
 /// 字段名与后端逐字一致；枚举取值严格校验，未知值抛 [FormatException]
 /// 以便契约漂移在测试期暴露而非静默吞掉）。
 library;
 
+import 'package:patbond_flutter/core/models/patch_field.dart';
+
+export 'package:patbond_flutter/core/models/patch_field.dart';
 export 'package:patbond_flutter/core/models/cursor_page.dart';
 
 /// 物种（创建即定，不可修改）。
@@ -143,6 +146,7 @@ class Pet {
     required this.microchipNo,
     required this.sterilizedOn,
     required this.status,
+    required this.avatarUrl,
     required this.myRole,
     required this.createdAt,
     required this.updatedAt,
@@ -164,6 +168,9 @@ class Pet {
       microchipNo: json['microchipNo'] as String?,
       sterilizedOn: _dateOrNull(json['sterilizedOn']),
       status: PetStatus.fromJson(json['status'] as String),
+      // 契约 v1.4.0 新增：时效性预签名 GET URL，每次响应现签；
+      // 不得持久化、过期即重取。响应**不含 avatarAssetId**（只写不读）。
+      avatarUrl: json['avatarUrl'] as String?,
       myRole: PetRole.fromJson(json['myRole'] as String),
       createdAt: DateTime.parse(json['createdAt'] as String),
       updatedAt: DateTime.parse(json['updatedAt'] as String),
@@ -184,6 +191,11 @@ class Pet {
   final String? microchipNo;
   final DateTime? sterilizedOn;
   final PetStatus status;
+
+  /// 头像预签名 GET URL；无头像 / asset 非 ready / 对象存储未配置均为 null。
+  /// 「有头像」等价于本字段非 null（契约不外露 assetId）。
+  final String? avatarUrl;
+
   final PetRole myRole;
   final DateTime createdAt;
   final DateTime updatedAt;
@@ -230,8 +242,17 @@ class CreatePetRequest {
   };
 }
 
-/// 更新宠物请求（部分更新：缺席字段不变；不支持清空回 null；
+/// 更新宠物请求（部分更新：缺席字段不变；品种对整体替换；species 不可改；
-/// 品种对整体替换；species 不可改；version 乐观锁必填）。
+/// version 乐观锁必填）。
+///
+/// **两态与三态并存**：除 [avatarAssetId] 外的字段沿 M2 两态语义（缺省或
+/// null 皆为「不改」，不支持清空回 null——它们的 CHECK 约束本就不允许空值）；
+/// [avatarAssetId] 是本 schema **唯一的三态字段**（契约 v1.4.0），因为
+/// 「删掉我设的那张头像」是一等公民操作，两态根本无法表达。
+///
+/// **权限随本次触及的字段变档**（ADR-022 + 服务端 `requiredLevel`）：
+/// 只带 [avatarAssetId] 走 WRITE（owner + caregiver 均可）；碰任一资料字段
+/// 即 MANAGE（仅 owner）；混合请求取更严的一半（防「夹带改名」）。
 class UpdatePetRequest {
   const UpdatePetRequest({
     required this.version,
@@ -245,6 +266,7 @@ class UpdatePetRequest {
     this.microchipNo,
     this.sterilizedOn,
     this.status,
+    this.avatarAssetId = const PatchField<String>.absent(),
   });
 
   final int version;
@@ -259,19 +281,26 @@ class UpdatePetRequest {
   final DateTime? sterilizedOn;
   final PetStatus? status;
 
-  Map<String, Object?> toJson() => {
+  /// 宠物头像 asset（两步上传产物，`purpose` 须为 `pet_avatar`）。三态。
-    'version': version,
+  final PatchField<String> avatarAssetId;
-    if (name != null) 'name': name,
+
-    if (breedId != null) 'breedId': breedId,
+  Map<String, Object?> toJson() {
-    if (customBreedName != null) 'customBreedName': customBreedName,
+    final json = <String, Object?>{
-    if (sex != null) 'sex': sex!.name,
+      'version': version,
-    if (birthDate != null) 'birthDate': dateToJson(birthDate!),
+      if (name != null) 'name': name,
-    if (birthDateEstimated != null) 'birthDateEstimated': birthDateEstimated,
+      if (breedId != null) 'breedId': breedId,
-    if (personality != null) 'personality': personality,
+      if (customBreedName != null) 'customBreedName': customBreedName,
-    if (microchipNo != null) 'microchipNo': microchipNo,
+      if (sex != null) 'sex': sex!.name,
-    if (sterilizedOn != null) 'sterilizedOn': dateToJson(sterilizedOn!),
+      if (birthDate != null) 'birthDate': dateToJson(birthDate!),
-    if (status != null) 'status': status!.name,
+      if (birthDateEstimated != null) 'birthDateEstimated': birthDateEstimated,
-  };
+      if (personality != null) 'personality': personality,
+      if (microchipNo != null) 'microchipNo': microchipNo,
+      if (sterilizedOn != null) 'sterilizedOn': dateToJson(sterilizedOn!),
+      if (status != null) 'status': status!.name,
+    };
+    avatarAssetId.writeTo(json, 'avatarAssetId');
+    return json;
+  }
 }
 
 /// 品种目录项（只读字典）。

lib/features/pets/pets_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:patbond_flutter/analytics/analytics_page_name.dart';
 import 'package:patbond_flutter/core/navigation/fade_route.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
@@ -25,6 +26,7 @@ class PetsPage extends StatefulWidget {
     super.key,
     this.analytics,
     this.healthAnalytics,
+    this.avatarUploaderBuilder,
   });
 
   final PetsController controller;
@@ -33,6 +35,9 @@ class PetsPage extends StatefulWidget {
   /// health_record 域埋点（T2-13，记录页面族透传）。
   final HealthRecordAnalytics? healthAnalytics;
 
+  /// 头像上传编排器构造口（T3.5-09，透传详情页）。
+  final AvatarUploaderBuilder? avatarUploaderBuilder;
+
   @override
   State<PetsPage> createState() => _PetsPageState();
 }
@@ -75,6 +80,7 @@ class _PetsPageState extends State<PetsPage> {
           petId: pet.id,
           analytics: widget.analytics,
           healthAnalytics: widget.healthAnalytics,
+          avatarUploaderBuilder: widget.avatarUploaderBuilder,
         ),
         settings: RouteSettings(name: AnalyticsPageName.petDetail.pageName),
       ),
@@ -189,7 +195,8 @@ class _PetCard extends StatelessWidget {
           padding: const EdgeInsets.all(14),
           child: Row(
             children: [
-              const PetAvatar(size: PetAvatarSize.lg),
+              // T3.5-09：列表卡展示真实头像（预签名 URL，无图回退爪印占位）。
+              PetAvatar(size: PetAvatarSize.lg, url: pet.avatarUrl),
               const SizedBox(width: 12),
               Expanded(
                 child: Column(

lib/features/pets/vaccination_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/primary_button.dart';
@@ -503,14 +504,21 @@ class _VaccinationFormPageState extends State<VaccinationFormPage> {
         value == null ? '未选择' : dateToJson(value),
         style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
       ),
-      trailing: const Icon(
+      trailing: AppDateFieldTrailing(
-        Icons.calendar_month_outlined,
+        firstDate: DateTime(1990),
-        color: AppColors.muted,
+        lastDate: allowFuture
+            ? DateTime(DateTime.now().year + 5)
+            : DateTime.now(),
+        enabled: !_submitting,
+        onToday: (value) {
+          _markStarted();
+          onPicked(value);
+        },
       ),
       enabled: !_submitting,
       onTap: () async {
         final now = DateTime.now();
-        final picked = await showDatePicker(
+        final picked = await pickAppDate(
           context: context,
           initialDate: value ?? now,
           firstDate: DateTime(1990),

lib/features/pets/vaccination_records_page.dart

@@ -3,6 +3,7 @@ import 'package:patbond_flutter/analytics/analytics_page_name.dart';
 import 'package:patbond_flutter/core/navigation/fade_route.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
@@ -514,9 +515,19 @@ class _CompleteVaccinationDialogState
         value == null ? '未选择' : dateToJson(value),
         style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
       ),
+      trailing: AppDateFieldTrailing(
+        firstDate: DateTime(1990),
+        lastDate: allowFuture
+            ? DateTime(DateTime.now().year + 5)
+            : DateTime.now(),
+        onToday: (picked) => setState(() {
+          onPicked(picked);
+          _dateError = null;
+        }),
+      ),
       onTap: () async {
         final now = DateTime.now();
-        final picked = await showDatePicker(
+        final picked = await pickAppDate(
           context: context,
           initialDate: value ?? now,
           firstDate: DateTime(1990),

lib/features/pets/weight_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/core/widgets/app_text_field.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/primary_button.dart';
@@ -241,14 +242,19 @@ class _WeightFormPageState extends State<WeightFormPage> {
                 dateToJson(_measuredDate),
                 style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
               ),
-              trailing: const Icon(
+              trailing: AppDateFieldTrailing(
-                Icons.calendar_month_outlined,
+                firstDate: DateTime(1990),
-                color: AppColors.muted,
+                lastDate: DateTime.now(),
+                enabled: !_submitting,
+                onToday: (value) {
+                  _markStarted();
+                  setState(() => _measuredDate = value);
+                },
               ),
               enabled: !_submitting,
               onTap: () async {
                 final now = DateTime.now();
-                final value = await showDatePicker(
+                final value = await pickAppDate(
                   context: context,
                   initialDate: _measuredDate,
                   firstDate: DateTime(1990),

lib/features/profile/profile_controller.dart

@@ -0,0 +1,137 @@
+import 'package:flutter/foundation.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/auth/auth_repository.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/community_repository.dart';
+
+/// 资料主链路四态（沿 pets/community 两域惯例）。
+enum ProfileLoadPhase { initial, loading, ready, error }
+
+/// 统计块的独立三态：`/me` 成功而统计失败时**只降级这一块**，不把整页
+/// 打成 error——昵称与头像已经拿到了，为两个数字丢掉整页是过度反应。
+enum ProfileStatsPhase { loading, ready, error }
+
+/// 「我的资料」状态控制器（T3.5-08）。
+///
+/// 数据源三处：
+/// - `GET /api/v1/me` → 昵称 / 头像（主链路，失败即页面 error 态）
+/// - `GET /api/v1/me/community-stats` → 获赞总数 / 作品数
+/// - `GET /api/v1/users/{me}/follow-stats` → 粉丝数 / 关注数
+///
+/// 首页问候语（T3.5-10）与资料页共用本控制器的 [displayName]，
+/// 保证两处展示名同源、改昵称后一起变（一次 `/me` 供两个消费点）。
+class ProfileController extends ChangeNotifier {
+  ProfileController({
+    required AuthRepository authRepository,
+    required CommunityRepository communityRepository,
+  }) : _auth = authRepository,
+       _community = communityRepository;
+
+  final AuthRepository _auth;
+  final CommunityRepository _community;
+
+  ProfileLoadPhase _phase = ProfileLoadPhase.initial;
+  ProfileStatsPhase _statsPhase = ProfileStatsPhase.loading;
+  UserProfile? _profile;
+  CommunityStats? _communityStats;
+  FollowStats? _followStats;
+  ApiException? _lastError;
+  bool _disposed = false;
+
+  ProfileLoadPhase get phase => _phase;
+  ProfileStatsPhase get statsPhase => _statsPhase;
+
+  /// 本人资料（ready 态非 null）。
+  UserProfile? get profile => _profile;
+
+  CommunityStats? get communityStats => _communityStats;
+  FollowStats? get followStats => _followStats;
+  ApiException? get lastError => _lastError;
+
+  /// 展示名 `nickname ?? username`；资料未到手时为 null（调用方不造假名）。
+  String? get displayName => _profile?.displayName;
+
+  /// 加载 / 重试。主链路错误收敛为 error 态供页面渲染 + 重试，不外抛。
+  ///
+  /// 已有资料副本时刷新失败**保留副本**（`_phase` 停在 ready）：与详情页
+  /// 「有副本即不打断阅读」的既有取舍一致。
+  Future<void> refresh() async {
+    if (_profile == null) {
+      _phase = ProfileLoadPhase.loading;
+    }
+    _lastError = null;
+    _notify();
+    try {
+      _profile = await _auth.me();
+      _phase = ProfileLoadPhase.ready;
+    } on ApiException catch (error) {
+      _lastError = error;
+      if (_profile == null) {
+        _phase = ProfileLoadPhase.error;
+        _notify();
+        return;
+      }
+    }
+    _notify();
+    await refreshStats();
+  }
+
+  /// 只重取两块统计（统计块的「重试」入口；主链路资料不动）。
+  Future<void> refreshStats() async {
+    final userId = _profile?.userId;
+    if (userId == null) return;
+    _statsPhase = ProfileStatsPhase.loading;
+    _notify();
+    try {
+      // 顺序取（同一服务、量级极小）：任一失败即整块 error。两个数字并列
+      // 在同一张卡上，只有一半是数字、另一半是「—」比整块「加载失败 +
+      // 重试」更费解。
+      final community = await _community.getMyCommunityStats();
+      final follow = await _community.getFollowStats(userId);
+      _communityStats = community;
+      _followStats = follow;
+      _statsPhase = ProfileStatsPhase.ready;
+    } on ApiException {
+      _statsPhase = ProfileStatsPhase.error;
+    }
+    _notify();
+  }
+
+  /// 提交资料变更（三态语义见 [UpdateMeRequest]）。
+  ///
+  /// **空 patch 直接短路不发请求**：服务端对空 patch 答 400/40000（刻意不
+  /// 静默 200），客户端没有理由去撞这一枪。
+  /// 成功即以服务端回显的全量资料替换本地副本（`avatarUrl` 现签，
+  /// 不做本地拼装）。失败按类型化异常外抛给编辑页分层呈现。
+  Future<UserProfile?> save(UpdateMeRequest request) async {
+    if (request.isEmpty) return _profile;
+    final updated = await _auth.updateMe(request);
+    _profile = updated;
+    _phase = ProfileLoadPhase.ready;
+    _notify();
+    return updated;
+  }
+
+  /// 登出清空：回 initial 并清资料，避免上一账号昵称/头像跨会话泄漏
+  /// （沿 `PetsController.reset` 先例）。
+  void reset() {
+    _phase = ProfileLoadPhase.initial;
+    _statsPhase = ProfileStatsPhase.loading;
+    _profile = null;
+    _communityStats = null;
+    _followStats = null;
+    _lastError = null;
+    _notify();
+  }
+
+  void _notify() {
+    if (!_disposed) notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    super.dispose();
+  }
+}

lib/features/profile/profile_display.dart

@@ -0,0 +1,47 @@
+import 'package:patbond_flutter/core/network/api_exception.dart';
+
+/// 资料页/编辑页的错误文案映射（沿 `petLoadErrorMessage` 先例：
+/// 服务端原始 message 一律不上屏）。
+String profileLoadErrorMessage(ApiException? error) => switch (error) {
+  ApiNetworkException _ => '网络异常，请检查网络后重试',
+  ApiRateLimitException _ => '请求过于频繁，请稍后再试',
+  _ => '加载失败，请稍后重试',
+};
+
+/// 保存资料的失败文案，按契约 v1.4.0 的 `PATCH /api/v1/me` 错误谱分层：
+///
+/// | 码 | 成因 | 文案取向 |
+/// | --- | --- | --- |
+/// | 40000 | 昵称长度/纯空白、空 patch、非法 UUID | 指向输入本身可改 |
+/// | 40405 | 头像 asset 不存在/非本人/已删/用途不符 | 引导重新上传 |
+/// | 42203 | 本人头像 asset 仍在 uploading/failed | 明说「还没传完」，可重试 |
+///
+/// 40000 的三种成因在客户端已各自前置拦截（长度校验 / 空 patch 短路 /
+/// assetId 来自服务端），真收到 40000 说明校验与服务端有偏差，
+/// 故文案不写死「昵称」，只指向「填写内容」。
+String profileSaveErrorMessage(ApiException? error) => switch (error) {
+  ApiBusinessException(code: ApiCodes.paramError) => '填写内容不符合要求，请检查后重试',
+  ApiBusinessException(code: ApiCodes.mediaNotFound) => '头像已失效，请重新上传',
+  ApiBusinessException(code: ApiCodes.mediaNotReady) => '头像还没上传完，请稍后重试',
+  ApiNetworkException _ => '网络异常，请检查网络后重试',
+  ApiRateLimitException _ => '请求过于频繁，请稍后再试',
+  _ => '保存失败，请稍后重试',
+};
+
+/// 昵称的客户端校验，与后端 `ck_users_nickname`（btrim + 1~32）对齐。
+///
+/// **长度按码点计**（`String.characters` 的等价物 `runes`）：数据库
+/// `char_length` 数的是码点，若按 UTF-16 `String.length` 校验，32 个 emoji
+/// 的合法昵称（UTF-16 长度 64）会被客户端误拒。
+///
+/// 返回 null 即通过；非空即字段级 errorText。
+String? validateNickname(String raw) {
+  // btrim 对齐：服务端先 btrim 再判长度，故校验也先 trim。
+  final trimmed = raw.trim();
+  if (trimmed.isEmpty) {
+    // 纯空白是 400/40000 而非隐式清空——清空走「清除昵称」显式入口。
+    return '昵称不能为空，如需清除请用下方「清除昵称」';
+  }
+  if (trimmed.runes.length > 32) return '昵称最多 32 个字';
+  return null;
+}

lib/features/profile/profile_edit_page.dart

@@ -0,0 +1,335 @@
+import 'package:flutter/material.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_text_field.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/core/widgets/primary_button.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+import 'package:patbond_flutter/features/profile/profile_display.dart';
+import 'package:patbond_flutter/widgets/common.dart';
+
+/// 资料编辑页（T3.5-08）：昵称 + 头像的唯一写入口。
+///
+/// **PATCH 三态在本页成形**（契约 v1.4.0 的 `UpdateMeRequest`）：
+///
+/// | 用户动作 | 提交表现 |
+/// | --- | --- |
+/// | 没碰昵称 | `nickname` **键不出现**（不改） |
+/// | 改了昵称 | `nickname: "新值"` |
+/// | 点「清除昵称」 | `nickname: null`（清空） |
+/// | 没碰头像 | `avatarAssetId` **键不出现** |
+/// | 传了新头像 | `avatarAssetId: "<ready assetId>"` |
+/// | 点「清除头像」 | `avatarAssetId: null` |
+///
+/// 「不改」与「清空」在 JSON 上是**键缺省 vs 显式 null** 两回事：若把未改
+/// 字段也发成 null，用户只改昵称就会连头像一起被清掉。故本页不维护
+/// 「当前值 → 直接整体提交」的表单模型，而是维护**三态意图**（[PatchField]），
+/// 与初值比对后只让真正变化的字段落键。
+class ProfileEditPage extends StatefulWidget {
+  const ProfileEditPage({
+    required this.controller,
+    super.key,
+    this.avatarUploaderBuilder,
+  });
+
+  final ProfileController controller;
+
+  /// 头像上传编排器构造口；null 即本次构建未装配上传能力，隐藏头像入口
+  /// （生产装配恒注入，见 `app.dart`）。
+  final AvatarUploaderBuilder? avatarUploaderBuilder;
+
+  @override
+  State<ProfileEditPage> createState() => _ProfileEditPageState();
+}
+
+class _ProfileEditPageState extends State<ProfileEditPage> {
+  late final TextEditingController _nickname;
+
+  /// 页面进入时的资料快照：差量比对的基准（服务端回显的权威值）。
+  late final UserProfile _initial;
+
+  /// 昵称的三态意图：null 表示「跟随输入框与初值的比对结果」，
+  /// 非 null 表示用户已显式点过「清除昵称」。
+  bool _nicknameCleared = false;
+
+  /// 头像的三态意图（absent / clear / 新 assetId）。
+  PatchField<String> _avatarIntent = const PatchField<String>.absent();
+
+  /// 新上传头像的本地预览（仅本页会话内有效，不落盘）。
+  String? _pendingAvatarUrl;
+
+  String? _nicknameError;
+  bool _saving = false;
+  ApiException? _saveError;
+
+  @override
+  void initState() {
+    super.initState();
+    _initial = widget.controller.profile!;
+    // **预填只用 DB 原值**，不用 displayName：若把回退出来的 username
+    // 预填进来，用户会以为自己设过昵称，一保存就把展示约定固化成数据
+    // （服务端 /me 刻意不回退，正是为了留住这个区别）。
+    _nickname = TextEditingController(text: _initial.nickname ?? '');
+    _nickname.addListener(_onNicknameChanged);
+  }
+
+  @override
+  void dispose() {
+    _nickname.dispose();
+    super.dispose();
+  }
+
+  void _onNicknameChanged() {
+    // 每次输入都重建：保存钮的可用性由 `_hasChanges` 现算，不重建就会出现
+    // 「已经打了字但保存钮还是灰的」。同时用户重新打字即撤销「清除」意图，
+    // 并清掉上一次的字段级错误。
+    setState(() {
+      if (_nicknameCleared && _nickname.text.isNotEmpty) {
+        _nicknameCleared = false;
+      }
+      _nicknameError = null;
+    });
+  }
+
+  /// 昵称三态：显式清除 > 与初值不同即设置 > 否则不改。
+  PatchField<String> get _nicknamePatch {
+    if (_nicknameCleared) {
+      // 本来就没有昵称时「清除」是空操作，不落键（避免制造空 patch 之外
+      // 的无意义写入）。
+      return _initial.nickname == null
+          ? const PatchField<String>.absent()
+          : const PatchField<String>.clear();
+    }
+    final trimmed = _nickname.text.trim();
+    if (trimmed.isEmpty) return const PatchField<String>.absent();
+    if (trimmed == _initial.nickname) return const PatchField<String>.absent();
+    return PatchField<String>.value(trimmed);
+  }
+
+  UpdateMeRequest get _request =>
+      UpdateMeRequest(nickname: _nicknamePatch, avatarAssetId: _avatarIntent);
+
+  bool get _hasChanges => !_request.isEmpty;
+
+  /// 当前应展示的头像：新传的 > 清除意图（无图） > 服务端现值。
+  String? get _shownAvatarUrl {
+    if (_avatarIntent.isClear) return null;
+    return _pendingAvatarUrl ?? _initial.avatarUrl;
+  }
+
+  bool get _hasAvatarNow => _shownAvatarUrl != null;
+
+  Future<void> _pickAvatar() async {
+    final builder = widget.avatarUploaderBuilder;
+    if (builder == null) return;
+    final assetId = await showAvatarUploadSheet(
+      context,
+      builder: builder,
+      purpose: MediaPurpose.userAvatar,
+    );
+    if (assetId == null || !mounted) return;
+    setState(() {
+      _avatarIntent = PatchField<String>.value(assetId);
+      // 预览沿用上传器给的可访问 URL？—— 没有：complete 响应的 url 与
+      // /me 的 avatarUrl 同为预签名，但本页不缓存它，改为保存后由服务端
+      // 回显。上传成功到保存之间以「已选择新头像」文案示意。
+      _pendingAvatarUrl = null;
+    });
+  }
+
+  void _clearAvatar() {
+    setState(() {
+      _avatarIntent = const PatchField<String>.clear();
+      _pendingAvatarUrl = null;
+    });
+  }
+
+  void _clearNickname() {
+    setState(() {
+      _nicknameCleared = true;
+      _nicknameError = null;
+      _nickname.clear();
+    });
+  }
+
+  Future<void> _save() async {
+    // 有内容的昵称才校验：空输入框意为「不改」（清空走显式入口）。
+    final raw = _nickname.text;
+    if (!_nicknameCleared && raw.trim().isNotEmpty) {
+      final error = validateNickname(raw);
+      if (error != null) {
+        setState(() => _nicknameError = error);
+        return;
+      }
+    }
+    final request = _request;
+    if (request.isEmpty) {
+      // 空 patch 服务端答 400/40000（刻意不静默 200）；客户端不去撞这一枪。
+      Navigator.of(context).pop(false);
+      return;
+    }
+    setState(() {
+      _saving = true;
+      _saveError = null;
+    });
+    try {
+      await widget.controller.save(request);
+      if (!mounted) return;
+      Navigator.of(context).pop(true);
+    } on ApiException catch (error) {
+      if (!mounted) return;
+      setState(() {
+        _saving = false;
+        _saveError = error;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final canUploadAvatar = widget.avatarUploaderBuilder != null;
+    return Scaffold(
+      appBar: AppBar(title: const Text('编辑资料')),
+      body: ListView(
+        padding: const EdgeInsets.fromLTRB(20, 12, 20, 30),
+        children: [
+          if (_saveError != null) ...[
+            InlineErrorBanner(message: profileSaveErrorMessage(_saveError)),
+            const SizedBox(height: 16),
+          ],
+          if (canUploadAvatar) ...[
+            Center(
+              child: Column(
+                children: [
+                  _AvatarPreview(
+                    url: _shownAvatarUrl,
+                    pendingAssetId: _avatarIntent.valueOrNull,
+                    onTap: _saving ? null : _pickAvatar,
+                  ),
+                  const SizedBox(height: 10),
+                  TextButton.icon(
+                    onPressed: _saving ? null : _pickAvatar,
+                    icon: const Icon(Icons.photo_camera_outlined, size: 18),
+                    label: const Text('更换头像'),
+                  ),
+                  if (_hasAvatarNow)
+                    TextButton(
+                      onPressed: _saving ? null : _clearAvatar,
+                      child: const Text(
+                        '清除头像',
+                        style: TextStyle(color: AppColors.errorDark),
+                      ),
+                    ),
+                  if (_avatarIntent.isClear)
+                    const Text(
+                      '保存后将移除头像',
+                      style: TextStyle(color: AppColors.inkSoft, fontSize: 12),
+                    ),
+                ],
+              ),
+            ),
+            const SizedBox(height: 20),
+          ],
+          AppTextField(
+            label: '昵称',
+            controller: _nickname,
+            enabled: !_saving,
+            errorText: _nicknameError,
+            // 未设昵称时点明「现在别人看到的是用户名」——展示回退是客户端
+            // 行为，不写进输入框（否则一保存就变成真昵称）。
+            helperText: _initial.nickname == null
+                ? '未设置，当前展示为用户名「${_initial.username}」'
+                : '1~32 个字',
+            textInputAction: TextInputAction.done,
+            onSubmitted: (_) => _saving ? null : _save(),
+          ),
+          if (_initial.nickname != null)
+            Align(
+              alignment: Alignment.centerLeft,
+              child: TextButton(
+                onPressed: _saving ? null : _clearNickname,
+                child: const Text(
+                  '清除昵称',
+                  style: TextStyle(color: AppColors.errorDark),
+                ),
+              ),
+            ),
+          if (_nicknameCleared)
+            const Text(
+              '保存后将清除昵称，展示名回退为用户名',
+              style: TextStyle(color: AppColors.inkSoft, fontSize: 12),
+            ),
+          const SizedBox(height: 24),
+          PrimaryButton(
+            label: '保存',
+            isLoading: _saving,
+            // 无变更时禁用：避免用户以为「点了保存但什么都没发生」。
+            onPressed: _hasChanges ? _save : null,
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+/// 编辑页头像预览：有 URL 走 [RemoteImage]（缓存 key 已剥签名参数）；
+/// 刚上传但尚未保存时无可用 URL，以「已选择新头像」占位说明。
+class _AvatarPreview extends StatelessWidget {
+  const _AvatarPreview({
+    required this.url,
+    required this.pendingAssetId,
+    this.onTap,
+  });
+
+  final String? url;
+  final String? pendingAssetId;
+  final VoidCallback? onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    final Widget content;
+    if (url != null) {
+      content = RemoteImage(
+        url: url!,
+        width: 96,
+        height: 96,
+        borderRadius: BorderRadius.circular(48),
+      );
+    } else if (pendingAssetId != null) {
+      content = const ColoredBox(
+        color: AppColors.surfaceTint,
+        child: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Icon(Icons.check_circle, color: AppColors.primary, size: 24),
+              SizedBox(height: 4),
+              Text(
+                '已选择\n新头像',
+                textAlign: TextAlign.center,
+                style: TextStyle(color: AppColors.primaryDark, fontSize: 10),
+              ),
+            ],
+          ),
+        ),
+      );
+    } else {
+      content = const ColoredBox(
+        color: AppColors.surfaceTint,
+        child: Icon(Icons.person_outline, color: AppColors.muted, size: 40),
+      );
+    }
+    return Semantics(
+      label: '更换头像',
+      button: onTap != null,
+      child: InkWell(
+        onTap: onTap,
+        customBorder: const CircleBorder(),
+        child: SizedBox(width: 96, height: 96, child: ClipOval(child: content)),
+      ),
+    );
+  }
+}

lib/features/profile/profile_page.dart

@@ -1,17 +1,49 @@
 import 'package:flutter/material.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
-import 'package:patbond_flutter/data/demo_data.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+import 'package:patbond_flutter/features/profile/profile_display.dart';
+import 'package:patbond_flutter/features/profile/profile_edit_page.dart';
 import 'package:patbond_flutter/state/app_state.dart';
 import 'package:patbond_flutter/widgets/common.dart';
 
-class ProfilePage extends StatelessWidget {
+/// 「我的资料」Tab（T3.5-08 真实化）。
-  const ProfilePage({required this.appState, super.key, this.onLogout});
+///
+/// 头部三项（展示名 / 头像 / 四个数字）自此全部来自服务端：
+/// `GET /me`（昵称与头像）+ `GET /me/community-stats`（获赞 / 作品）+
+/// `GET /users/{me}/follow-stats`（粉丝 / 关注）。M3 之前的硬编码
+/// 「萌宠新手（豆豆家长）」/「24 / 1.8k / 2」已退役。
+///
+/// 四态：loading（居中转圈）/ error（横幅 + 重试）/ ready。**没有独立空态**
+/// ——任何已认证用户都有资料，`/me/community-stats` 契约上「永不 404、空数据
+/// 返回 0」，故「新用户什么都没有」的形态就是 ready 态里的一排 0，
+/// 而不是另一个页面态。统计块另有独立三态（见 [ProfileStatsPhase]）。
+class ProfilePage extends StatefulWidget {
+  const ProfilePage({
+    required this.appState,
+    required this.controller,
+    super.key,
+    this.avatarUploaderBuilder,
+    this.onLogout,
+  });
 
   final AppState appState;
 
+  /// 资料与统计数据源（Tab 级单例，`app.dart` 装配注入；首页问候语同源）。
+  final ProfileController controller;
+
+  /// 头像上传编排器构造口（透传编辑页）。
+  final AvatarUploaderBuilder? avatarUploaderBuilder;
+
   /// 真实退出登录入口；未接线时保持演示提示。
   final Future<void> Function()? onLogout;
 
+  /// 刻意保留的 demo 入口（ADR-022 未纳入本迭代）：预约订单与健康卡包属
+  /// M5 服务域；地址定位需外部服务；设置与关于待有实际可设项。
+  /// 「我的收藏与草稿」的后端能力已就位（`/me/bookmarks`、`/me/posts`），
+  /// 但列表页本单未做（见 05 号报告遗留），故仍走演示提示。
   static const menuItems = [
     (Icons.assignment_outlined, '我的预约订单', '查看进行中与历史服务'),
     (Icons.bookmarks_outlined, '我的收藏与草稿', '已保存的宠物作品与攻略'),
@@ -20,18 +52,63 @@ class ProfilePage extends StatelessWidget {
     (Icons.settings_outlined, '设置与关于', '隐私设置与版本信息'),
   ];
 
+  @override
+  State<ProfilePage> createState() => _ProfilePageState();
+}
+
+class _ProfilePageState extends State<ProfilePage> {
+  ProfileController get _controller => widget.controller;
+
+  @override
+  void initState() {
+    super.initState();
+    // 主壳挂载即预取（IndexedStack 各 Tab 同时构建，沿 pets/home 先例）；
+    // 重登后控制器已 reset 回 initial，会重新拉取。首页问候语也消费这一次。
+    //
+    // **预取推到帧末**：`refresh()` 起手就同步 notify 一次（切 loading 态），
+    // 而同一控制器的另一个监听者（首页问候语）在本页 initState 时已构建完成
+    // ——在 initState 里同步通知它会命中 Flutter「build 期间 setState」断言。
+    // pets/home 各自只有自己一个监听者，故它们在 initState 里直取无妨。
+    if (_controller.phase == ProfileLoadPhase.initial) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (mounted && _controller.phase == ProfileLoadPhase.initial) {
+          _controller.refresh();
+        }
+      });
+    }
+  }
+
   void showDemoMessage(BuildContext context, String name) {
     ScaffoldMessenger.of(
       context,
     ).showSnackBar(SnackBar(content: Text('「$name」功能为演示入口')));
   }
 
+  Future<void> _openEdit() async {
+    if (_controller.profile == null) return;
+    final saved = await Navigator.of(context).push<bool>(
+      MaterialPageRoute<bool>(
+        builder: (_) => ProfileEditPage(
+          controller: _controller,
+          avatarUploaderBuilder: widget.avatarUploaderBuilder,
+        ),
+      ),
+    );
+    if (saved == true && mounted) {
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('资料已更新')));
+    }
+  }
+
+  /// 刻意保留的 demo 家具：AppState 仍承载首页天气/本地服务的演示数据，
+  /// 这个入口是它唯一的复位口（不影响服务端真实资料）。
   Future<void> reset(BuildContext context) async {
     final confirmed = await showDialog<bool>(
       context: context,
       builder: (context) => AlertDialog(
         title: const Text('恢复演示数据'),
-        content: const Text('宠物资料、疫苗记录以及新增帖子都会恢复为初始状态。'),
+        content: const Text('首页天气与本地服务的演示内容会恢复为初始状态（不影响账号资料与宠物档案）。'),
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(context, false),
@@ -45,7 +122,7 @@ class ProfilePage extends StatelessWidget {
       ),
     );
     if (confirmed == true) {
-      await appState.resetDemoData();
+      await widget.appState.resetDemoData();
       if (context.mounted) {
         ScaffoldMessenger.of(
           context,
@@ -56,6 +133,43 @@ class ProfilePage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: _controller,
+      builder: (context, _) {
+        switch (_controller.phase) {
+          case ProfileLoadPhase.initial:
+          case ProfileLoadPhase.loading:
+            return const Center(child: CircularProgressIndicator());
+          case ProfileLoadPhase.error:
+            return Center(
+              child: Padding(
+                padding: const EdgeInsets.all(24),
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    InlineErrorBanner(
+                      message: profileLoadErrorMessage(_controller.lastError),
+                    ),
+                    const SizedBox(height: 16),
+                    FilledButton(
+                      onPressed: _controller.refresh,
+                      child: const Text('重试'),
+                    ),
+                  ],
+                ),
+              ),
+            );
+          case ProfileLoadPhase.ready:
+            return RefreshIndicator(
+              onRefresh: _controller.refresh,
+              child: _content(_controller.profile!),
+            );
+        }
+      },
+    );
+  }
+
+  Widget _content(UserProfile profile) {
     return ListView(
       padding: const EdgeInsets.fromLTRB(16, 16, 16, 30),
       children: [
@@ -67,40 +181,38 @@ class ProfilePage extends StatelessWidget {
           ),
           child: Column(
             children: [
-              RemoteImage(
+              _ProfileAvatar(url: profile.avatarUrl, onTap: _openEdit),
-                url: userAvatar,
-                width: 82,
-                height: 82,
-                borderRadius: BorderRadius.circular(41),
-              ),
               const SizedBox(height: 12),
-              const Text(
+              Text(
-                '萌宠新手（豆豆家长）',
+                // 展示回退在客户端：`nickname ?? username`（服务端 /me 返回
-                style: TextStyle(
+                // DB 原值不回退，见 UserProfile.displayName 的理由）。
+                profile.displayName,
+                style: const TextStyle(
                   color: Colors.white,
                   fontSize: 17,
                   fontWeight: FontWeight.w800,
                 ),
               ),
               const SizedBox(height: 5),
-              const Text(
+              Text(
-                'Patbond 社区创作达人',
+                '@${profile.username}',
-                style: TextStyle(color: AppColors.accent, fontSize: 12),
+                style: const TextStyle(color: AppColors.accent, fontSize: 12),
               ),
-              const SizedBox(height: 20),
+              const SizedBox(height: 12),
+              OutlinedButton.icon(
+                style: OutlinedButton.styleFrom(
+                  foregroundColor: Colors.white,
+                  side: const BorderSide(color: Colors.white38),
+                  visualDensity: VisualDensity.compact,
+                ),
+                onPressed: _openEdit,
+                icon: const Icon(Icons.edit_outlined, size: 16),
+                label: const Text('编辑资料'),
+              ),
+              const SizedBox(height: 16),
               const Divider(color: Colors.white24),
               const SizedBox(height: 10),
-              Row(
+              _statsRow(),
-                mainAxisAlignment: MainAxisAlignment.spaceAround,
-                children: [
-                  const _ProfileStat(value: '24', label: '关注我'),
-                  const _ProfileStat(value: '1.8k', label: '获赞'),
-                  _ProfileStat(
-                    value: '${appState.posts.length}',
-                    label: '我的作品',
-                  ),
-                ],
-              ),
             ],
           ),
         ),
@@ -108,7 +220,7 @@ class ProfilePage extends StatelessWidget {
         SectionCard(
           padding: const EdgeInsets.symmetric(vertical: 6),
           child: Column(
-            children: menuItems.map((item) {
+            children: ProfilePage.menuItems.map((item) {
               return ListTile(
                 leading: CircleAvatar(
                   backgroundColor: AppColors.surfaceTint,
@@ -136,12 +248,112 @@ class ProfilePage extends StatelessWidget {
         ),
         const SizedBox(height: 10),
         TextButton(
-          onPressed: onLogout ?? () => showDemoMessage(context, '退出登录'),
+          onPressed: widget.onLogout ?? () => showDemoMessage(context, '退出登录'),
           child: const Text('切换账号或退出登录'),
         ),
       ],
     );
   }
+
+  /// 统计块三态：loading 占位「—」+ 转圈 / error 提示 + 重试 / ready 实数。
+  ///
+  /// 数字**不做 1.8k 式压缩**：获赞总数要能与帖子详情的 likeCount 逐一对上
+  /// （同一口径，含自赞），压缩会让「对不上」变成常态。
+  Widget _statsRow() {
+    switch (_controller.statsPhase) {
+      case ProfileStatsPhase.loading:
+        return const SizedBox(
+          height: 46,
+          child: Center(
+            child: SizedBox(
+              width: 20,
+              height: 20,
+              child: CircularProgressIndicator(strokeWidth: 2),
+            ),
+          ),
+        );
+      case ProfileStatsPhase.error:
+        return SizedBox(
+          height: 46,
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              const Text(
+                '统计加载失败',
+                style: TextStyle(color: Colors.white70, fontSize: 12),
+              ),
+              TextButton(
+                onPressed: _controller.refreshStats,
+                child: const Text(
+                  '重试',
+                  style: TextStyle(color: AppColors.accent),
+                ),
+              ),
+            ],
+          ),
+        );
+      case ProfileStatsPhase.ready:
+        final follow = _controller.followStats;
+        final community = _controller.communityStats;
+        return Row(
+          mainAxisAlignment: MainAxisAlignment.spaceAround,
+          children: [
+            _ProfileStat(value: '${follow?.followerCount ?? 0}', label: '关注我'),
+            _ProfileStat(value: '${follow?.followingCount ?? 0}', label: '我关注'),
+            _ProfileStat(
+              value: '${community?.receivedLikeCount ?? 0}',
+              label: '获赞',
+            ),
+            _ProfileStat(
+              value: '${community?.publishedPostCount ?? 0}',
+              label: '我的作品',
+            ),
+          ],
+        );
+    }
+  }
+}
+
+/// 资料页头像：有 URL 走 [RemoteImage]（缓存 key 剥签名参数，URL 不落盘）；
+/// 无头像时本地占位（不显示破图）。
+class _ProfileAvatar extends StatelessWidget {
+  const _ProfileAvatar({required this.url, required this.onTap});
+
+  final String? url;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return Semantics(
+      label: '编辑资料',
+      button: true,
+      child: InkWell(
+        onTap: onTap,
+        customBorder: const CircleBorder(),
+        child: SizedBox(
+          width: 82,
+          height: 82,
+          child: ClipOval(
+            child: url == null
+                ? const ColoredBox(
+                    color: AppColors.surfaceTint,
+                    child: Icon(
+                      Icons.person_outline,
+                      color: AppColors.muted,
+                      size: 36,
+                    ),
+                  )
+                : RemoteImage(
+                    url: url!,
+                    width: 82,
+                    height: 82,
+                    borderRadius: BorderRadius.circular(41),
+                  ),
+          ),
+        ),
+      ),
+    );
+  }
 }
 
 class _ProfileStat extends StatelessWidget {

lib/state/app_state.dart

@@ -7,13 +7,16 @@ import 'package:shared_preferences/shared_preferences.dart';
 
 class AppState extends ChangeNotifier {
   static const _petKey = 'patbond_pet';
-  static const _postsKey = 'patbond_posts';
   static const _locationWeatherKey = 'patbond_location_weather';
 
   /// 首页问候卡 / 创作页 / 主壳头像仍消费的 demo 宠物（T2-12 起档案
   /// Tab 已切独立 pets feature 真实数据；此 demo 随后续工单收敛）。
+  ///
+  /// **demo 帖子列表已于 T3-17 退役**：Feed / 详情页自 T3-14/15 起消费
+  /// community 真实数据，发布页自 T3-17 起走真实两步上传 + 建草稿/迁移
+  /// 发布，`posts` / `publishPost` / `updatePost` 与其
+  /// shared_preferences 持久化一并删除（03 号评估 §1.1 判定）。
   PetProfile pet = initialPet;
-  List<PostModel> posts = List<PostModel>.from(initialPosts);
   LocationWeather locationWeather = initialLocationWeather;
   bool isReady = false;
 
@@ -21,17 +24,11 @@ class AppState extends ChangeNotifier {
     try {
       final preferences = await SharedPreferences.getInstance();
       final savedPet = preferences.getString(_petKey);
-      final savedPosts = preferences.getString(_postsKey);
       final savedLocationWeather = preferences.getString(_locationWeatherKey);
 
       if (savedPet != null) {
         pet = PetProfile.fromJson(jsonDecode(savedPet) as Map<String, dynamic>);
       }
-      if (savedPosts != null) {
-        posts = (jsonDecode(savedPosts) as List)
-            .map((item) => PostModel.fromJson(item as Map<String, dynamic>))
-            .toList();
-      }
       if (savedLocationWeather != null) {
         locationWeather = LocationWeather.fromJson(
           jsonDecode(savedLocationWeather) as Map<String, dynamic>,
@@ -40,7 +37,6 @@ class AppState extends ChangeNotifier {
     } catch (error, stackTrace) {
       debugPrint('读取本地数据失败，已使用默认数据：$error\n$stackTrace');
       pet = initialPet;
-      posts = List<PostModel>.from(initialPosts);
       locationWeather = initialLocationWeather;
     } finally {
       isReady = true;
@@ -48,21 +44,6 @@ class AppState extends ChangeNotifier {
     }
   }
 
-  Future<void> updatePost(PostModel value) async {
-    final index = posts.indexWhere((post) => post.id == value.id);
-    if (index == -1) return;
-    posts[index] = value;
-    posts = List<PostModel>.from(posts);
-    notifyListeners();
-    await _savePosts();
-  }
-
-  Future<void> publishPost(PostModel value) async {
-    posts = [value, ...posts];
-    notifyListeners();
-    await _savePosts();
-  }
-
   Future<void> updateLocationWeather(LocationWeather value) async {
     locationWeather = value;
     notifyListeners();
@@ -71,21 +52,15 @@ class AppState extends ChangeNotifier {
 
   Future<void> resetDemoData() async {
     pet = initialPet;
-    posts = List<PostModel>.from(initialPosts);
     locationWeather = initialLocationWeather;
     notifyListeners();
     final preferences = await SharedPreferences.getInstance();
     await Future.wait([
       preferences.remove(_petKey),
-      preferences.remove(_postsKey),
       preferences.remove(_locationWeatherKey),
     ]);
   }
 
-  Future<void> _savePosts() {
-    return _save(_postsKey, posts.map((post) => post.toJson()).toList());
-  }
-
   Future<void> _save(String key, Object value) async {
     try {
       final preferences = await SharedPreferences.getInstance();

pubspec.lock

@@ -235,6 +235,11 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.0"
+  flutter_localizations:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -399,6 +404,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  intl:
+    dependency: "direct main"
+    description:
+      name: intl
+      sha256: "3df61194eb431efc39c4ceba583b95633a403f46c9fd341e550ce0bfa50e9aa5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.20.2"
   jni:
     dependency: transitive
     description:

pubspec.yaml

@@ -43,6 +43,13 @@ dependencies:
   image_picker: ^1.2.0
   # T3-13 媒体上传：原生编解码压缩（长边重采样 + JPEG 质量 + EXIF 方向矫正）。
   flutter_image_compress: ^2.4.0
+  # M3.5-01 中文本地化：Material/Cupertino/Widgets 内置组件文案（日期选择器
+  # 标题、确定/取消、输入模式提示与格式错误）由 Global*Localizations 提供。
+  flutter_localizations:
+    sdk: flutter
+  # flutter_localizations 的日期符号/数字格式底座；显式直接依赖以锁定与 SDK
+  # 一致的版本（避免间接依赖升级悄悄改变格式化行为）。
+  intl: ^0.20.2
 
 dev_dependencies:
   flutter_test:

test/app/app_localization_test.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/app/app.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../helpers/auth_test_helpers.dart';
+import '../helpers/community_test_helpers.dart';
+import '../helpers/pet_test_helpers.dart';
+
+/// M3.5-01：根 [MaterialApp] 实际挂上 zh-CN 本地化。
+///
+/// 用户桌面实测反馈「日期选择器全英文」的根因就在这里——delegate 一行没配，
+/// Material 静默回退英文兜底。本测试守住这一行不被回删。
+void main() {
+  testWidgets('MaterialApp 挂三件套 delegate + 单语言 zh-CN', (tester) async {
+    SharedPreferences.setMockInitialValues({});
+    final session = SessionManager(store: InMemoryTokenStore())
+      ..markAuthenticated();
+
+    await tester.pumpWidget(
+      App(
+        sessionManager: session,
+        authRepository: FakeAuthRepository(),
+        petsRepository: FakePetsRepository(),
+        communityRepository: FakeCommunityRepository()
+          ..onFeed = (_, _) async => feedPage(const []),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    final app = tester.widget<MaterialApp>(find.byType(MaterialApp));
+    expect(app.localizationsDelegates, appLocalizationsDelegates);
+    expect(app.supportedLocales, appSupportedLocales);
+    expect(app.locale, const Locale('zh', 'CN'));
+
+    // 运行期实际解析出的 Material 文案为中文（不是 Default* 英文兜底）。
+    final context = tester.element(find.byType(NavigationBar));
+    final l10n = MaterialLocalizations.of(context);
+    expect(l10n.okButtonLabel, '确定');
+    expect(l10n.cancelButtonLabel, '取消');
+    expect(l10n.datePickerHelpText, '选择日期');
+    expect(l10n.dateInputLabel, '输入日期');
+    expect(l10n.inputDateModeButtonLabel, '切换到输入模式');
+    expect(l10n.invalidDateFormatLabel, '格式无效。');
+    expect(l10n.formatMonthYear(DateTime(2026, 9, 10)), '2026年9月');
+  });
+}

test/core/models/patch_field_test.dart

@@ -0,0 +1,71 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/models/patch_field.dart';
+
+/// PATCH 三态的 JSON 表现（契约 v1.4.0 的 `UpdateMeRequest` /
+/// `UpdatePetRequest.avatarAssetId`）。
+///
+/// 本文件守住的红线只有一条：**absent 绝不落键**。若 absent 落成 `null`，
+/// 用户「只改昵称」会把头像一起清掉（服务端把显式 null 当清空指令）。
+void main() {
+  test('absent 不落键 / clear 落 null / value 落值', () {
+    final json = <String, Object?>{};
+    const PatchField<String>.absent().writeTo(json, 'a');
+    expect(json.containsKey('a'), isFalse, reason: 'absent 必须连键都不出现');
+
+    const PatchField<String>.clear().writeTo(json, 'b');
+    expect(json.containsKey('b'), isTrue);
+    expect(json['b'], isNull);
+
+    const PatchField<String>.value('x').writeTo(json, 'c');
+    expect(json['c'], 'x');
+  });
+
+  test('absent 与 clear 的 valueOrNull 同为 null，只能靠 isPresent 区分', () {
+    const absent = PatchField<String>.absent();
+    const clear = PatchField<String>.clear();
+    expect(absent.valueOrNull, isNull);
+    expect(clear.valueOrNull, isNull);
+    expect(absent.isPresent, isFalse);
+    expect(clear.isPresent, isTrue);
+    expect(absent.isClear, isFalse);
+    expect(clear.isClear, isTrue);
+    expect(const PatchField<String>.value('x').isClear, isFalse);
+  });
+
+  test('encode 只作用于有值态（clear 不调 encode，避免 null 解引用）', () {
+    final json = <String, Object?>{};
+    var encodeCalls = 0;
+    const PatchField<int>.clear().writeTo(
+      json,
+      'n',
+      encode: (value) {
+        encodeCalls += 1;
+        return value.toString();
+      },
+    );
+    expect(json['n'], isNull);
+    expect(encodeCalls, 0);
+
+    const PatchField<int>.value(7).writeTo(
+      json,
+      'm',
+      encode: (value) {
+        encodeCalls += 1;
+        return value.toString();
+      },
+    );
+    expect(json['m'], '7');
+    expect(encodeCalls, 1);
+  });
+
+  test('值相等即相等（absent 与 clear 不相等）', () {
+    expect(
+      const PatchField<String>.value('a'),
+      const PatchField<String>.value('a'),
+    );
+    expect(
+      const PatchField<String>.absent(),
+      isNot(const PatchField<String>.clear()),
+    );
+  });
+}

test/core/widgets/app_date_picker_test.dart

@@ -0,0 +1,385 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
+
+/// M3.5-01/02：日期录入共享层。
+///
+/// 覆盖三条用户实测反馈：中文文案实际渲染、键盘输入模式可用、「今天」快捷键。
+void main() {
+  /// 挂真实 app 配置（主题 + zh-CN delegate）的宿主：不挂 delegate 的话
+  /// Material 会回退英文兜底，测出来的「中文」是假的。
+  Widget host(Widget child) => MaterialApp(
+    theme: buildAppTheme(),
+    localizationsDelegates: appLocalizationsDelegates,
+    supportedLocales: appSupportedLocales,
+    locale: appLocale,
+    home: Scaffold(body: child),
+  );
+
+  group('dateOnly / today / isDateSelectable', () {
+    test('dateOnly 抹掉时分秒', () {
+      expect(
+        dateOnly(DateTime(2026, 4, 9, 23, 59, 58, 777)),
+        DateTime(2026, 4, 9),
+      );
+    });
+
+    test('today 为本地当天零点', () {
+      final now = DateTime.now();
+      expect(today(), DateTime(now.year, now.month, now.day));
+    });
+
+    test('isDateSelectable 闭区间按日粒度判定', () {
+      final first = DateTime(2026, 9, 1);
+      final last = DateTime(2026, 9, 30, 8, 30);
+      expect(
+        isDateSelectable(
+          date: DateTime(2026, 9, 1),
+          firstDate: first,
+          lastDate: last,
+        ),
+        isTrue,
+      );
+      // 边界当天含时分也算落在区间内（lastDate 的时分不该把当天挤出去）。
+      expect(
+        isDateSelectable(
+          date: DateTime(2026, 9, 30, 23, 0),
+          firstDate: first,
+          lastDate: last,
+        ),
+        isTrue,
+      );
+      expect(
+        isDateSelectable(
+          date: DateTime(2026, 8, 31),
+          firstDate: first,
+          lastDate: last,
+        ),
+        isFalse,
+      );
+      expect(
+        isDateSelectable(
+          date: DateTime(2026, 10, 1),
+          firstDate: first,
+          lastDate: last,
+        ),
+        isFalse,
+      );
+    });
+  });
+
+  group('pickAppDate · 中文本地化实际渲染', () {
+    testWidgets('日历模式：标题/确定/取消全中文（此前为 Select date / OK / Cancel）', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () => pickAppDate(
+                context: context,
+                initialDate: DateTime(2026, 9, 10),
+                firstDate: DateTime(1990),
+                lastDate: DateTime(2026, 9, 30),
+              ),
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('选择日期'), findsOneWidget);
+      expect(find.text('确定'), findsOneWidget);
+      expect(find.text('取消'), findsOneWidget);
+      expect(find.text('Select date'), findsNothing);
+      expect(find.text('OK'), findsNothing);
+      expect(find.text('Cancel'), findsNothing);
+    });
+
+    testWidgets('保留手输切换按钮（不用 calendarOnly），切换后提示与标签为中文', (tester) async {
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () => pickAppDate(
+                context: context,
+                initialDate: DateTime(2026, 9, 10),
+                firstDate: DateTime(1990),
+                lastDate: DateTime(2026, 9, 30),
+              ),
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+
+      // calendarOnly 会砍掉这枚铅笔按钮——手输是「录一个已知日期」的快路，
+      // 必须留着。
+      final toggle = find.byIcon(Icons.edit_outlined);
+      expect(toggle, findsOneWidget);
+
+      await tester.tap(toggle);
+      await tester.pumpAndSettle();
+
+      expect(find.text('输入日期'), findsOneWidget);
+      expect(find.byType(TextField), findsOneWidget);
+      final field = tester.widget<TextField>(find.byType(TextField));
+      // 手输提示/标签由 zh-CN 本地化提供（不硬编码），不再是 mm/dd/yyyy。
+      expect(field.decoration!.labelText, isNot(contains('Date')));
+      expect(field.decoration!.hintText, isNot('mm/dd/yyyy'));
+    });
+
+    testWidgets('手输模式敲入已知日期即可返回（无需逐月点箭头）', (tester) async {
+      DateTime? picked;
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () async {
+                picked = await pickAppDate(
+                  context: context,
+                  initialDate: DateTime(2026, 9, 10),
+                  firstDate: DateTime(1990),
+                  lastDate: DateTime(2026, 9, 30),
+                );
+              },
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.byIcon(Icons.edit_outlined));
+      await tester.pumpAndSettle();
+
+      await tester.enterText(find.byType(TextField), '2026/04/09');
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+
+      expect(picked, DateTime(2026, 4, 9));
+    });
+
+    testWidgets('取消返回 null；确认返回值已抹掉时分秒', (tester) async {
+      DateTime? picked;
+      var calls = 0;
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () async {
+                calls++;
+                picked = await pickAppDate(
+                  context: context,
+                  initialDate: DateTime(2026, 9, 10, 15, 30),
+                  firstDate: DateTime(1990),
+                  lastDate: DateTime(2026, 9, 30),
+                );
+              },
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('取消'));
+      await tester.pumpAndSettle();
+      expect(calls, 1);
+      expect(picked, isNull);
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+      expect(picked, DateTime(2026, 9, 10));
+    });
+
+    testWidgets('initialDate 越界自动夹进 [firstDate, lastDate]（不触发原生断言）', (
+      tester,
+    ) async {
+      DateTime? picked;
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () async {
+                // 历史值早于 firstDate：如「提醒到期日」firstDate 是今天，
+                // 而表单预填的是一个已过期的旧值。
+                picked = await pickAppDate(
+                  context: context,
+                  initialDate: DateTime(2020, 1, 1),
+                  firstDate: DateTime(2026, 9, 1),
+                  lastDate: DateTime(2026, 9, 30),
+                );
+              },
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+
+      expect(picked, DateTime(2026, 9, 1));
+    });
+  });
+
+  group('AppDateFieldTrailing · 「今天」快捷键', () {
+    testWidgets('点「今天」直接回调今天，不开弹窗', (tester) async {
+      DateTime? got;
+      await tester.pumpWidget(
+        host(
+          AppDateFieldTrailing(
+            firstDate: DateTime(1990),
+            lastDate: DateTime(2100),
+            onToday: (value) => got = value,
+          ),
+        ),
+      );
+
+      expect(find.text('今天'), findsOneWidget);
+      expect(find.byIcon(Icons.calendar_month_outlined), findsOneWidget);
+
+      await tester.tap(find.text('今天'));
+      await tester.pumpAndSettle();
+
+      expect(got, today());
+      // 快捷键不经日期选择器（少两次点击、绕开月份导航）。
+      expect(find.text('选择日期'), findsNothing);
+    });
+
+    testWidgets('今天越界时隐藏按钮，只留日历图标', (tester) async {
+      await tester.pumpWidget(
+        host(
+          AppDateFieldTrailing(
+            firstDate: DateTime(1990),
+            lastDate: DateTime(1999, 12, 31),
+            onToday: (_) {},
+          ),
+        ),
+      );
+
+      expect(find.text('今天'), findsNothing);
+      expect(find.byIcon(Icons.calendar_month_outlined), findsOneWidget);
+    });
+
+    testWidgets('enabled=false（提交中）按钮禁用', (tester) async {
+      var calls = 0;
+      await tester.pumpWidget(
+        host(
+          AppDateFieldTrailing(
+            firstDate: DateTime(1990),
+            lastDate: DateTime(2100),
+            enabled: false,
+            onToday: (_) => calls++,
+          ),
+        ),
+      );
+
+      expect(
+        tester.widget<TextButton>(find.byType(TextButton)).onPressed,
+        isNull,
+      );
+      await tester.tap(find.text('今天'), warnIfMissed: false);
+      await tester.pumpAndSettle();
+      expect(calls, 0);
+    });
+
+    testWidgets('触控目标不小于 44×44', (tester) async {
+      await tester.pumpWidget(
+        host(
+          AppDateFieldTrailing(
+            firstDate: DateTime(1990),
+            lastDate: DateTime(2100),
+            onToday: (_) {},
+          ),
+        ),
+      );
+
+      final size = tester.getSize(find.byType(TextButton));
+      expect(size.width, greaterThanOrEqualTo(44));
+      expect(size.height, greaterThanOrEqualTo(44));
+    });
+  });
+
+  group('datePickerTheme · 品牌配色（不再是 fromSeed 的暗红棕）', () {
+    test('选中日/选中年为 primaryStrong 实底白字，今日 primaryStrong 描边', () {
+      final theme = buildAppTheme().datePickerTheme;
+      const selected = <WidgetState>{WidgetState.selected};
+
+      expect(
+        theme.dayBackgroundColor!.resolve(selected),
+        AppColors.primaryStrong,
+      );
+      expect(theme.dayForegroundColor!.resolve(selected), Colors.white);
+      expect(
+        theme.yearBackgroundColor!.resolve(selected),
+        AppColors.primaryStrong,
+      );
+      expect(theme.yearForegroundColor!.resolve(selected), Colors.white);
+      expect(theme.todayBorder!.color, AppColors.primaryStrong);
+      expect(
+        theme.todayForegroundColor!.resolve(const {}),
+        AppColors.primaryStrong,
+      );
+      // 头部沿用「选中 chip」既有色对：surfaceTint 底 + primaryDark 字 7.98:1。
+      expect(theme.headerBackgroundColor, AppColors.surfaceTint);
+      expect(theme.headerForegroundColor, AppColors.primaryDark);
+      expect(theme.backgroundColor, AppColors.surface);
+      // 越界不可选日走禁用态 muted（DEBT-2 允许的 muted 用途）。
+      expect(
+        theme.dayForegroundColor!.resolve(const {WidgetState.disabled}),
+        AppColors.muted,
+      );
+    });
+
+    testWidgets('实际渲染：选中日圆底取 primaryStrong', (tester) async {
+      await tester.pumpWidget(
+        host(
+          Builder(
+            builder: (context) => TextButton(
+              onPressed: () => pickAppDate(
+                context: context,
+                initialDate: DateTime(2026, 9, 10),
+                firstDate: DateTime(1990),
+                lastDate: DateTime(2026, 9, 30),
+              ),
+              child: const Text('打开'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('打开'));
+      await tester.pumpAndSettle();
+
+      // 选中日的圆底由 Ink(decoration: ShapeDecoration) 承载，色值取自
+      // datePickerTheme.dayBackgroundColor / todayBackgroundColor。
+      final inkColors = tester
+          .widgetList<Ink>(find.byType(Ink))
+          .map((ink) => ink.decoration)
+          .whereType<ShapeDecoration>()
+          .map((d) => d.color)
+          .toList();
+      expect(
+        inkColors,
+        contains(AppColors.primaryStrong),
+        reason: '选中日未使用品牌 primaryStrong 实底（仍是 fromSeed 派生色）',
+      );
+    });
+  });
+}

test/core/widgets/avatar_upload_sheet_test.dart

@@ -0,0 +1,162 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/avatar_upload_sheet.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/media_direct_upload.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+
+import '../../helpers/community_test_helpers.dart';
+import '../../helpers/media_test_helpers.dart';
+
+/// 头像上传 sheet 的六态呈现（状态机本身由 MediaUploader 单测覆盖，
+/// 本文件只验「哪个阶段给用户看什么、能点什么」）。
+void main() {
+  late FakeCommunityRepository community;
+  late FakeMediaImagePicker picker;
+  late FakeMediaCompressor compressor;
+  late FakeDirectUploadClient direct;
+
+  setUp(() {
+    community = FakeCommunityRepository();
+    picker = FakeMediaImagePicker([decodablePickedImage()]);
+    compressor = FakeMediaCompressor();
+    direct = FakeDirectUploadClient();
+    community.onCreateMediaUpload = (_) async => credentials();
+    community.onCompleteMediaUpload = (assetId) async =>
+        readyAsset(assetId: assetId);
+  });
+
+  MediaUploader build(MediaPurpose purpose) => MediaUploader(
+    repository: community,
+    purpose: purpose,
+    picker: picker,
+    compressor: compressor,
+    directUpload: direct,
+    maxImages: 1,
+    maxConcurrentUploads: 1,
+  );
+
+  /// 挂一个按钮拉起 sheet，并把 pop 结果记录下来。
+  Future<List<String?>> pumpSheet(
+    WidgetTester tester, {
+    MediaPurpose purpose = MediaPurpose.userAvatar,
+  }) async {
+    final results = <String?>[];
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: Builder(
+          builder: (context) => Scaffold(
+            body: Center(
+              child: ElevatedButton(
+                onPressed: () async {
+                  results.add(
+                    await showAvatarUploadSheet(
+                      context,
+                      builder: build,
+                      purpose: purpose,
+                    ),
+                  );
+                },
+                child: const Text('打开'),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.tap(find.text('打开'));
+    await tester.pump();
+    return results;
+  }
+
+  testWidgets('打开即自动拉起选择器（无需多点一次「选择图片」）', (tester) async {
+    picker.gate = Completer<void>();
+    await pumpSheet(tester);
+    await tester.pump();
+
+    expect(find.text('正在打开相册…'), findsOneWidget);
+    expect(picker.limits, [1], reason: 'maxImages=1 → 只取一张');
+
+    picker.gate!.complete();
+    await tester.pumpAndSettle();
+  });
+
+  testWidgets('上传中：线性进度 + 百分比；ready 后给预览与「使用这张」', (tester) async {
+    direct.manual = true;
+    final results = await pumpSheet(tester);
+    await tester.pumpAndSettle();
+
+    expect(find.byType(LinearProgressIndicator), findsOneWidget);
+    final call = direct.calls.single;
+    call.emitProgress(30, 100);
+    await tester.pump();
+    expect(find.text('上传中 30%'), findsOneWidget);
+
+    call.succeed();
+    await tester.pumpAndSettle();
+
+    expect(find.text('使用这张'), findsOneWidget);
+    expect(find.byType(Image), findsOneWidget, reason: 'ready 态给整幅预览');
+
+    await tester.tap(find.text('使用这张'));
+    await tester.pumpAndSettle();
+
+    expect(results.single, 'a-1', reason: '只交付 ready 态的 assetId（孤儿防护）');
+  });
+
+  testWidgets('purpose 透传到 createUpload（宠物头像 = pet_avatar）', (tester) async {
+    await pumpSheet(tester, purpose: MediaPurpose.petAvatar);
+    await tester.pumpAndSettle();
+
+    expect(community.lastMediaUploadRequest!.purpose, MediaPurpose.petAvatar);
+    expect(community.lastMediaUploadRequest!.purpose.wire, 'pet_avatar');
+  });
+
+  testWidgets('可重试失败：给「重试」+「重新选择」，重试成功后可确认', (tester) async {
+    direct.scriptedOutcomes.add(
+      const MediaDirectUploadException(message: '断网'),
+    );
+    final results = await pumpSheet(tester);
+    await tester.pumpAndSettle();
+
+    expect(find.text('网络中断，上传失败'), findsOneWidget);
+    expect(find.text('重试'), findsOneWidget);
+    expect(find.text('重新选择'), findsOneWidget);
+
+    await tester.tap(find.text('重试'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('使用这张'), findsOneWidget);
+    await tester.tap(find.text('使用这张'));
+    await tester.pumpAndSettle();
+    expect(results.single, 'a-1');
+  });
+
+  testWidgets('不可重试失败（压缩后仍超限）：只给「重新选择」，不给「重试」', (tester) async {
+    compressor.sizePerQuality = {80: 20 * 1024 * 1024, 60: 15 * 1024 * 1024};
+    await pumpSheet(tester);
+    await tester.pumpAndSettle();
+
+    expect(find.text('图片过大，压缩后仍超过 10 MB'), findsOneWidget);
+    expect(find.text('重试'), findsNothing, reason: '重试同一张必然再失败，给重试钮是误导');
+    expect(find.text('重新选择'), findsOneWidget);
+  });
+
+  testWidgets('用户在系统选择器里取消 → 空态可再次选择，pop 结果为 null', (tester) async {
+    picker = FakeMediaImagePicker(const []);
+    final results = await pumpSheet(tester);
+    await tester.pumpAndSettle();
+
+    expect(find.text('还没有选择图片'), findsOneWidget);
+    expect(find.text('选择图片'), findsOneWidget);
+
+    // 关闭 sheet：未走到 ready，不交付任何 assetId。
+    await tester.tapAt(const Offset(10, 10));
+    await tester.pumpAndSettle();
+    expect(results.single, isNull);
+  });
+}

test/core/widgets/comment_tile_test.dart

@@ -0,0 +1,75 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/comment_tile.dart';
+
+import '../../helpers/community_test_helpers.dart';
+
+void main() {
+  final now = DateTime.parse('2026-09-08T13:00:00.000Z');
+
+  Widget wrap(Widget child) => MaterialApp(
+    theme: buildAppTheme(),
+    home: Scaffold(body: Center(child: child)),
+  );
+
+  testWidgets('渲染作者名 / 内容 / 相对时间；无 onDelete 不显删除', (tester) async {
+    await tester.pumpWidget(
+      wrap(CommentTile(comment: sampleComment(), now: now)),
+    );
+
+    expect(find.text('毛毛的铲屎官'), findsOneWidget);
+    expect(find.text('好可爱！', findRichText: true), findsOneWidget);
+    expect(find.text('2 小时前'), findsOneWidget);
+    expect(find.text('删除'), findsNothing);
+  });
+
+  testWidgets('@ 回复以「回复 @昵称：」前缀呈现；降级作者「宠友」占位', (tester) async {
+    await tester.pumpWidget(
+      wrap(
+        CommentTile(
+          comment: sampleComment(
+            author: sampleAuthorJson(nickname: null, avatarUrl: null),
+            replyToUser: sampleAuthorJson(userId: 'u-2', nickname: '豆豆麻麻'),
+          ),
+          now: now,
+        ),
+      ),
+    );
+
+    expect(find.text('宠友'), findsOneWidget);
+    expect(
+      find.textContaining('回复 @豆豆麻麻：', findRichText: true),
+      findsOneWidget,
+    );
+  });
+
+  testWidgets('onDelete 提供时显删除入口并回调；deleting 期间转圈锁定', (tester) async {
+    var deleted = 0;
+    await tester.pumpWidget(
+      wrap(
+        CommentTile(
+          comment: sampleComment(),
+          now: now,
+          onDelete: () => deleted++,
+        ),
+      ),
+    );
+
+    await tester.tap(find.text('删除'));
+    expect(deleted, 1);
+
+    await tester.pumpWidget(
+      wrap(
+        CommentTile(
+          comment: sampleComment(),
+          now: now,
+          deleting: true,
+          onDelete: () => deleted++,
+        ),
+      ),
+    );
+    expect(find.text('删除'), findsNothing);
+    expect(find.byType(CircularProgressIndicator), findsOneWidget);
+  });
+}

test/core/widgets/like_button_test.dart

@@ -0,0 +1,155 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/like_button.dart';
+
+/// 宿主：模拟持有方（controller）的状态翻转——点按经 [onTap] 乐观翻转，
+/// 外部（回滚/对账）经 [setActive] 直接改。
+class _Host extends StatefulWidget {
+  const _Host({required this.initialActive, required this.initialCount});
+
+  final bool initialActive;
+  final int initialCount;
+
+  @override
+  State<_Host> createState() => _HostState();
+}
+
+class _HostState extends State<_Host> {
+  late bool active = widget.initialActive;
+  late int count = widget.initialCount;
+
+  void setExternal({required bool active, required int count}) {
+    setState(() {
+      this.active = active;
+      this.count = count;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      theme: buildAppTheme(),
+      home: Scaffold(
+        body: Center(
+          child: LikeButton(
+            variant: LikeButtonVariant.like,
+            active: active,
+            count: count,
+            onPressed: () => setState(() {
+              active = !active;
+              count += active ? 1 : -1;
+            }),
+            semanticLabel: '点赞',
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+void main() {
+  double scaleOf(WidgetTester tester) => tester
+      .widget<ScaleTransition>(
+        find.descendant(
+          of: find.byType(LikeButton),
+          matching: find.byType(ScaleTransition),
+        ),
+      )
+      .scale
+      .value;
+
+  testWidgets('点按激活：240ms 弹性缩放动画（中途 >1，播完归位）', (tester) async {
+    await tester.pumpWidget(const _Host(initialActive: false, initialCount: 6));
+
+    await tester.tap(find.byIcon(Icons.favorite_border));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 90));
+    expect(scaleOf(tester), greaterThan(1.0));
+    expect(find.byIcon(Icons.favorite), findsOneWidget);
+    expect(find.text('7'), findsOneWidget);
+
+    await tester.pumpAndSettle();
+    expect(scaleOf(tester), 1.0);
+  });
+
+  testWidgets('点按取消：仅颜色切换，无缩放动画', (tester) async {
+    await tester.pumpWidget(const _Host(initialActive: true, initialCount: 7));
+
+    await tester.tap(find.byIcon(Icons.favorite));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 90));
+    expect(scaleOf(tester), 1.0);
+    expect(find.byIcon(Icons.favorite_border), findsOneWidget);
+    expect(find.text('6'), findsOneWidget);
+    await tester.pumpAndSettle();
+  });
+
+  testWidgets('外部回滚：零动画直接跳变，计数与状态成对恢复', (tester) async {
+    await tester.pumpWidget(const _Host(initialActive: false, initialCount: 6));
+
+    // 点按激活并播完动画（在途请求随后失败的场景）。
+    await tester.tap(find.byIcon(Icons.favorite_border));
+    await tester.pumpAndSettle();
+    expect(find.byIcon(Icons.favorite), findsOneWidget);
+
+    // 外部（非点按）回滚：下一帧即恢复，无过渡动画。
+    tester
+        .state<_HostState>(find.byType(_Host))
+        .setExternal(active: false, count: 6);
+    await tester.pump();
+    expect(find.byIcon(Icons.favorite_border), findsOneWidget);
+    expect(find.text('6'), findsOneWidget);
+    expect(scaleOf(tester), 1.0);
+  });
+
+  testWidgets('激活动画未播完时回滚：等播完再成对跳变（§4.3a 抖动抑制）', (tester) async {
+    await tester.pumpWidget(const _Host(initialActive: false, initialCount: 6));
+
+    await tester.tap(find.byIcon(Icons.favorite_border));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 60));
+    expect(find.byIcon(Icons.favorite), findsOneWidget);
+
+    // 动画中途回滚：本帧仍显示激活视觉（等待播完），计数同持。
+    tester
+        .state<_HostState>(find.byType(_Host))
+        .setExternal(active: false, count: 6);
+    await tester.pump();
+    expect(find.byIcon(Icons.favorite), findsOneWidget);
+    expect(find.text('7'), findsOneWidget);
+
+    // 播完后成对跳回。
+    await tester.pumpAndSettle();
+    expect(find.byIcon(Icons.favorite_border), findsOneWidget);
+    expect(find.text('6'), findsOneWidget);
+  });
+
+  testWidgets('对账静默：状态不变的计数变化直接替换，无动画', (tester) async {
+    await tester.pumpWidget(const _Host(initialActive: true, initialCount: 7));
+
+    tester
+        .state<_HostState>(find.byType(_Host))
+        .setExternal(active: true, count: 9);
+    await tester.pump();
+    expect(find.text('9'), findsOneWidget);
+    expect(scaleOf(tester), 1.0);
+  });
+
+  testWidgets('onPressed 为 null 时禁用但照常渲染激活态', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: const Scaffold(
+          body: LikeButton(
+            variant: LikeButtonVariant.bookmark,
+            active: true,
+            count: 2,
+          ),
+        ),
+      ),
+    );
+    expect(find.byIcon(Icons.bookmark), findsOneWidget);
+    expect(find.text('2'), findsOneWidget);
+  });
+}

test/core/widgets/post_media_grid_test.dart

@@ -3,8 +3,12 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
 import 'package:patbond_flutter/core/widgets/feed_skeleton.dart';
 import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
+import 'package:patbond_flutter/core/widgets/upload_progress_overlay.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
 import 'package:patbond_flutter/widgets/common.dart';
 
+import '../../helpers/media_test_helpers.dart';
+
 Widget wrap(Widget child, {bool disableAnimations = false}) => MaterialApp(
   theme: buildAppTheme(),
   home: MediaQuery(
@@ -97,4 +101,92 @@ void main() {
       expect(fade.opacity.value, 1.0);
     });
   });
+
+  group('PostMediaEditGrid 编辑态（05 §3.2）', () {
+    MediaUploadItem item({
+      int localId = 1,
+      MediaItemPhase phase = MediaItemPhase.ready,
+      double progress = 0,
+      bool retryable = false,
+    }) => MediaUploadItem(
+      localId: localId,
+      phase: phase,
+      previewBytes: tinyPngBytes,
+      progress: progress,
+      assetId: phase == MediaItemPhase.ready ? 'a-$localId' : null,
+      retryable: retryable,
+    );
+
+    testWidgets('空列表只渲染「＋」格；3 张图渲染 3 格 + 「＋」', (tester) async {
+      await tester.pumpWidget(wrap(const PostMediaEditGrid(items: [])));
+      expect(find.byIcon(Icons.add_photo_alternate_outlined), findsOneWidget);
+      expect(find.byType(Image), findsNothing);
+
+      await tester.pumpWidget(
+        wrap(
+          PostMediaEditGrid(
+            items: [item(localId: 1), item(localId: 2), item(localId: 3)],
+          ),
+        ),
+      );
+      await tester.pump();
+      expect(find.byType(Image), findsNWidgets(3));
+      expect(find.byIcon(Icons.add_photo_alternate_outlined), findsOneWidget);
+    });
+
+    testWidgets('满 9 张（canAdd=false）隐藏「＋」格', (tester) async {
+      await tester.pumpWidget(
+        wrap(
+          PostMediaEditGrid(
+            items: List.generate(9, (i) => item(localId: i + 1)),
+            canAdd: false,
+          ),
+        ),
+      );
+      expect(find.byIcon(Icons.add_photo_alternate_outlined), findsNothing);
+      expect(find.byType(Image), findsNWidgets(9));
+    });
+
+    testWidgets('删除角标回传 localId；「＋」格回调', (tester) async {
+      final removed = <int>[];
+      var addTaps = 0;
+      await tester.pumpWidget(
+        wrap(
+          PostMediaEditGrid(
+            items: [item(localId: 7), item(localId: 8)],
+            onAdd: () => addTaps++,
+            onRemove: removed.add,
+          ),
+        ),
+      );
+      await tester.pump();
+      await tester.tap(find.byIcon(Icons.close).first);
+      expect(removed, [7]);
+      await tester.tap(find.byIcon(Icons.add_photo_alternate_outlined));
+      expect(addTaps, 1);
+    });
+
+    testWidgets('上传中格叠进度覆盖层；可重试失败格整格点按重试，终态不响应', (tester) async {
+      final retried = <int>[];
+      await tester.pumpWidget(
+        wrap(
+          PostMediaEditGrid(
+            items: [
+              item(localId: 1, phase: MediaItemPhase.uploading, progress: 0.42),
+              item(localId: 2, phase: MediaItemPhase.failed, retryable: true),
+              item(localId: 3, phase: MediaItemPhase.failed),
+            ],
+            onRetry: retried.add,
+          ),
+        ),
+      );
+      await tester.pump();
+      expect(find.byType(UploadProgressOverlay), findsNWidgets(3));
+      expect(find.text('42%'), findsOneWidget);
+      // 可重试格有「重试」通栏，终态格没有。
+      expect(find.text('重试'), findsOneWidget);
+      await tester.tap(find.text('重试'));
+      expect(retried, [2]);
+    });
+  });
 }

test/features/community/community_interaction_analytics_test.dart

@@ -0,0 +1,126 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
+
+void main() {
+  late List<(String, Map<String, dynamic>?)> events;
+  late CommunityInteractionAnalytics analytics;
+
+  setUp(() {
+    events = [];
+    analytics = CommunityInteractionAnalytics(
+      (name, [props]) async => events.add((name, props)),
+    );
+  });
+
+  List<String> names() => events.map((e) => e.$1).toList();
+  List<Map<String, dynamic>?> props() => events.map((e) => e.$2).toList();
+
+  test('互动四事件：source 逐字段（22 号白名单键集）', () {
+    analytics.postLiked(source: InteractionSource.feed);
+    analytics.postUnliked(source: InteractionSource.postDetail);
+    analytics.postFavorited(source: InteractionSource.postDetail);
+    analytics.postUnfavorited(source: InteractionSource.feed);
+
+    expect(names(), [
+      'post_liked',
+      'post_unliked',
+      'post_favorited',
+      'post_unfavorited',
+    ]);
+    expect(props(), [
+      {'source': 'feed'},
+      {'source': 'post_detail'},
+      {'source': 'post_detail'},
+      {'source': 'feed'},
+    ]);
+  });
+
+  test('comment_create_succeeded：durationMs/isReply/textLengthBucket', () {
+    analytics.commentCreateSucceeded(
+      durationMs: 4200,
+      isReply: false,
+      textLength: 12,
+    );
+    expect(names(), ['comment_create_succeeded']);
+    expect(props().single, {
+      'durationMs': 4200,
+      'isReply': false,
+      'textLengthBucket': 'short',
+    });
+  });
+
+  test('comment_create_failed：httpStatus 由五位业务码推导，网络错误缺席', () {
+    analytics.commentCreateFailed(
+      reason: CommentCreateFailureReason.validationError,
+      attemptSeq: 2,
+      errorCode: 40000,
+    );
+    analytics.commentCreateFailed(
+      reason: CommentCreateFailureReason.networkError,
+      attemptSeq: 3,
+    );
+    expect(names(), ['comment_create_failed', 'comment_create_failed']);
+    expect(props(), [
+      {
+        'failureReason': 'validation_error',
+        'attemptSeq': 2,
+        'errorCode': 40000,
+        'httpStatus': 400,
+      },
+      {'failureReason': 'network_error', 'attemptSeq': 3},
+    ]);
+  });
+
+  test('关注对：user_followed / user_unfollowed', () {
+    analytics.userFollowed(source: InteractionSource.postDetail);
+    analytics.userUnfollowed(source: InteractionSource.postDetail);
+    expect(names(), ['user_followed', 'user_unfollowed']);
+    expect(props(), [
+      {'source': 'post_detail'},
+      {'source': 'post_detail'},
+    ]);
+  });
+
+  test('textLengthBucketOf 分桶边界（06 §1.3 红线：不报精确字数）', () {
+    expect(textLengthBucketOf(0), 'empty');
+    expect(textLengthBucketOf(1), 'short');
+    expect(textLengthBucketOf(50), 'short');
+    expect(textLengthBucketOf(51), 'medium');
+    expect(textLengthBucketOf(500), 'medium');
+    expect(textLengthBucketOf(501), 'long');
+  });
+
+  test('失败原因映射：网络归并口径 + 防枚举族归 not_found + 会话失效 null', () {
+    expect(
+      commentCreateFailureReasonOf(const ApiNetworkException()),
+      CommentCreateFailureReason.networkError,
+    );
+    expect(
+      commentCreateFailureReasonOf(const ApiRateLimitException()),
+      CommentCreateFailureReason.rateLimited,
+    );
+    expect(
+      commentCreateFailureReasonOf(
+        const ApiBusinessException(code: ApiCodes.paramError, message: 'x'),
+      ),
+      CommentCreateFailureReason.validationError,
+    );
+    expect(
+      commentCreateFailureReasonOf(
+        const ApiBusinessException(code: ApiCodes.postNotFound, message: 'x'),
+      ),
+      CommentCreateFailureReason.notFound,
+    );
+    expect(
+      commentCreateFailureReasonOf(
+        const ApiBusinessException(code: 50000, message: 'x'),
+      ),
+      CommentCreateFailureReason.serverError,
+    );
+    expect(
+      commentCreateFailureReasonOf(const SessionExpiredException()),
+      isNull,
+    );
+  });
+}

test/features/community/media_uploader_test.dart

@@ -6,6 +6,7 @@ import 'package:patbond_flutter/features/community/community_exceptions.dart';
 import 'package:patbond_flutter/features/community/community_models.dart';
 import 'package:patbond_flutter/features/community/media_direct_upload.dart';
 import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
 
 import '../../helpers/community_test_helpers.dart';
 import '../../helpers/media_test_helpers.dart';
@@ -24,12 +25,14 @@ void main() {
     int maxConcurrentUploads = 2,
     int maxByteSize = 10 * 1024 * 1024,
     DateTime Function()? now,
+    PostAnalytics? analytics,
   }) {
     return MediaUploader(
       repository: repository,
       picker: picker,
       compressor: compressor,
       directUpload: direct,
+      analytics: analytics,
       maxConcurrentUploads: maxConcurrentUploads,
       maxByteSize: maxByteSize,
       now: now,
@@ -453,6 +456,151 @@ void main() {
       expect(uploader.overallProgress, closeTo(0.75, 0.001));
     });
   });
+
+  // ---- 媒体上传三段埋点（T3-17；22 号白名单 v3 事件 27~29）----
+  group('媒体三段埋点', () {
+    late List<(String, Map<String, dynamic>?)> events;
+    late PostAnalytics analytics;
+
+    setUp(() {
+      events = [];
+      analytics = PostAnalytics(
+        (name, [props]) async => events.add((name, props)),
+      );
+    });
+
+    List<Map<String, dynamic>?> named(String name) =>
+        events.where((event) => event.$1 == name).map((e) => e.$2).toList();
+
+    test('成功一图：started → succeeded 各一条，sizeBucket 同值 + durationMs', () async {
+      var clock = DateTime.utc(2026, 9, 10, 8);
+      // 凭据有效期以注入时钟为基准（避免与真实时钟错位触发过期重取）。
+      repository.onCreateMediaUpload = (_) async => credentials(
+        assetId: 'a-1',
+        expiresAt: clock.add(const Duration(minutes: 10)),
+      );
+      final uploader = build(analytics: analytics, now: () => clock);
+
+      direct.manual = true;
+      uploader.addImages([pickedImage(size: 2048)]);
+      await pumpEventQueue();
+      // started 已记时；上传耗时 1200ms 后 confirm 成功。
+      clock = clock.add(const Duration(milliseconds: 1200));
+      direct.calls.single.succeed();
+      await pumpEventQueue();
+
+      expect(events.map((e) => e.$1), [
+        'post_media_upload_started',
+        'post_media_upload_succeeded',
+      ]);
+      expect(named('post_media_upload_started').single, {
+        'mediaType': 'image',
+        'sizeBucket': 'lt_1mb',
+      });
+      expect(named('post_media_upload_succeeded').single, {
+        'mediaType': 'image',
+        'sizeBucket': 'lt_1mb',
+        'durationMs': 1200,
+      });
+    });
+
+    test('压缩后仍超限：started + failed(media_too_large, attemptSeq 1)', () async {
+      compressor.sizePerQuality = {80: 40, 60: 30};
+      final uploader = build(maxByteSize: 20, analytics: analytics);
+
+      uploader.addImages([pickedImage()]);
+      await pumpEventQueue();
+
+      expect(uploader.items.single.retryable, isFalse);
+      expect(named('post_media_upload_succeeded'), isEmpty);
+      expect(named('post_media_upload_failed').single, {
+        'mediaType': 'image',
+        'sizeBucket': 'lt_1mb',
+        'failureReason': 'media_too_large',
+        'attemptSeq': 1,
+      });
+    });
+
+    test('断连失败 → retry：failed(network_error) 后 attemptSeq 递增再成功', () async {
+      direct.scriptedOutcomes.add(
+        const MediaDirectUploadException(message: '断连'),
+      );
+      final uploader = build(analytics: analytics);
+
+      uploader.addImages([pickedImage()]);
+      await pumpEventQueue();
+      expect(named('post_media_upload_failed').single, {
+        'mediaType': 'image',
+        'sizeBucket': 'lt_1mb',
+        'failureReason': 'network_error',
+        'attemptSeq': 1,
+      });
+
+      uploader.retry(uploader.items.single.localId);
+      await pumpEventQueue();
+
+      expect(uploader.items.single.phase, MediaItemPhase.ready);
+      expect(named('post_media_upload_started'), hasLength(2));
+      expect(named('post_media_upload_succeeded'), hasLength(1));
+    });
+
+    test(
+      'createUpload 40000：failed(unsupported_format) 带 errorCode/httpStatus',
+      () async {
+        repository.onCreateMediaUpload = (_) async =>
+            throw const ApiBusinessException(code: 40000, message: 'bad mime');
+        final uploader = build(analytics: analytics);
+
+        uploader.addImages([pickedImage()]);
+        await pumpEventQueue();
+
+        expect(named('post_media_upload_failed').single, {
+          'mediaType': 'image',
+          'sizeBucket': 'lt_1mb',
+          'failureReason': 'unsupported_format',
+          'attemptSeq': 1,
+          'errorCode': 40000,
+          'httpStatus': 400,
+        });
+      },
+    );
+
+    test('在途删格报 cancelled；ready 后删格不报', () async {
+      direct.manual = true;
+      final uploader = build(analytics: analytics);
+      uploader.addImages([pickedImage(seed: 1)]);
+      await pumpEventQueue();
+
+      uploader.remove(uploader.items.single.localId);
+      expect(named('post_media_upload_failed').single, {
+        'mediaType': 'image',
+        'sizeBucket': 'lt_1mb',
+        'failureReason': 'cancelled',
+        'attemptSeq': 1,
+      });
+
+      events.clear();
+      direct.manual = false;
+      uploader.addImages([pickedImage(seed: 2)]);
+      await pumpEventQueue();
+      expect(uploader.items.single.isReady, isTrue);
+      uploader.remove(uploader.items.single.localId);
+      expect(named('post_media_upload_failed'), isEmpty);
+    });
+
+    test('会话失效不上报失败（应用即将回登录页）', () async {
+      repository.onCreateMediaUpload = (_) async =>
+          throw const SessionExpiredException();
+      final uploader = build(analytics: analytics);
+
+      uploader.addImages([pickedImage()]);
+      await pumpEventQueue();
+
+      expect(uploader.items.single.isFailed, isTrue);
+      expect(named('post_media_upload_failed'), isEmpty);
+      expect(named('post_media_upload_started'), hasLength(1));
+    });
+  });
 }
 
 Map<String, dynamic> readyAssetJson({required String assetId}) => {

test/features/community/post_analytics_test.dart

@@ -0,0 +1,193 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
+
+/// post 域埋点封装（T3-17）：键集与 22 号白名单 v3 事件 22~29 逐一对齐、
+/// 分桶边界、异常 → failureReason 映射、隐私红线（无内容 ID / 无精确字数）。
+void main() {
+  late List<(String, Map<String, dynamic>?)> events;
+  late PostAnalytics analytics;
+
+  setUp(() {
+    events = [];
+    analytics = PostAnalytics(
+      (name, [props]) async => events.add((name, props)),
+    );
+  });
+
+  group('键集与白名单对齐（22 号 §1）', () {
+    test('post_create_started：entryPoint', () {
+      analytics.postCreateStarted(entryPoint: PostEntryPoint.createTab);
+      expect(events.single.$1, 'post_create_started');
+      expect(events.single.$2, {'entryPoint': 'create_tab'});
+    });
+
+    test('post_draft_saved：trigger + mediaCount', () {
+      analytics.postDraftSaved(trigger: DraftSaveTrigger.onExit, mediaCount: 3);
+      expect(events.single.$1, 'post_draft_saved');
+      expect(events.single.$2, {'trigger': 'on_exit', 'mediaCount': 3});
+    });
+
+    test('post_publish_succeeded：五键齐 + 正文只出分桶', () {
+      analytics.postPublishSucceeded(
+        durationMs: 8200,
+        mediaCount: 2,
+        topicCount: 0,
+        textLength: 120,
+        fromDraft: true,
+      );
+      final props = events.single.$2!;
+      expect(
+        props.keys,
+        containsAll(<String>[
+          'durationMs',
+          'mediaCount',
+          'topicCount',
+          'textLengthBucket',
+          'fromDraft',
+        ]),
+      );
+      expect(props['textLengthBucket'], 'medium');
+      expect(props['fromDraft'], isTrue);
+      // 红线 1/2：不带精确字数、不带 postId。
+      expect(props.containsKey('textLength'), isFalse);
+      expect(props.containsKey('postId'), isFalse);
+    });
+
+    test(
+      'post_publish_failed：failureReason/attemptSeq/errorCode/httpStatus',
+      () {
+        analytics.postPublishFailed(
+          reason: PostPublishFailureReason.mediaUploadIncomplete,
+          attemptSeq: 2,
+          errorCode: 42203,
+        );
+        expect(events.single.$2, {
+          'failureReason': 'media_upload_incomplete',
+          'attemptSeq': 2,
+          'errorCode': 42203,
+          'httpStatus': 422,
+        });
+      },
+    );
+
+    test('post_publish_failed：网络错误无 errorCode/httpStatus', () {
+      analytics.postPublishFailed(
+        reason: PostPublishFailureReason.networkError,
+        attemptSeq: 1,
+      );
+      expect(events.single.$2, {
+        'failureReason': 'network_error',
+        'attemptSeq': 1,
+      });
+    });
+
+    test('post_deleted：空属性集（单事件风格）', () {
+      analytics.postDeleted();
+      expect(events.single.$1, 'post_deleted');
+      expect(events.single.$2, isEmpty);
+    });
+
+    test('媒体三段：键集齐 + 只出桶不出字节数/文件名', () {
+      analytics.mediaUploadStarted(
+        mediaType: MediaType.image,
+        byteSize: 3 * 1024 * 1024,
+      );
+      analytics.mediaUploadSucceeded(
+        mediaType: MediaType.image,
+        byteSize: 3 * 1024 * 1024,
+        durationMs: 4300,
+      );
+      analytics.mediaUploadFailed(
+        mediaType: MediaType.image,
+        byteSize: 3 * 1024 * 1024,
+        reason: MediaUploadFailureReason.cancelled,
+        attemptSeq: 1,
+      );
+      expect(events.map((event) => event.$1), [
+        'post_media_upload_started',
+        'post_media_upload_succeeded',
+        'post_media_upload_failed',
+      ]);
+      expect(events[0].$2, {'mediaType': 'image', 'sizeBucket': 'mb_1_5'});
+      expect(events[1].$2, {
+        'mediaType': 'image',
+        'sizeBucket': 'mb_1_5',
+        'durationMs': 4300,
+      });
+      expect(events[2].$2, {
+        'mediaType': 'image',
+        'sizeBucket': 'mb_1_5',
+        'failureReason': 'cancelled',
+        'attemptSeq': 1,
+      });
+      for (final event in events) {
+        expect(event.$2!.containsKey('byteSize'), isFalse);
+        expect(event.$2!.containsKey('fileName'), isFalse);
+      }
+    });
+  });
+
+  group('分桶边界（06 §1.3 红线 4）', () {
+    test('mediaSizeBucketOf 四档', () {
+      const mib = 1024 * 1024;
+      expect(mediaSizeBucketOf(0), 'lt_1mb');
+      expect(mediaSizeBucketOf(mib - 1), 'lt_1mb');
+      expect(mediaSizeBucketOf(mib), 'mb_1_5');
+      expect(mediaSizeBucketOf(5 * mib - 1), 'mb_1_5');
+      expect(mediaSizeBucketOf(5 * mib), 'mb_5_20');
+      expect(mediaSizeBucketOf(20 * mib - 1), 'mb_5_20');
+      expect(mediaSizeBucketOf(20 * mib), 'gte_20mb');
+    });
+  });
+
+  group('异常 → 发布失败原因', () {
+    test('42203 → media_upload_incomplete；40905/40000 → validation_error', () {
+      expect(
+        postPublishFailureReasonOf(const MediaNotReadyException(message: 'x')),
+        PostPublishFailureReason.mediaUploadIncomplete,
+      );
+      expect(
+        postPublishFailureReasonOf(
+          const IdempotencyMismatchException(message: 'x'),
+        ),
+        PostPublishFailureReason.validationError,
+      );
+      expect(
+        postPublishFailureReasonOf(
+          const ApiBusinessException(code: 40000, message: 'x'),
+        ),
+        PostPublishFailureReason.validationError,
+      );
+    });
+
+    test('40403 → not_found；40902 → server_error；限流/网络各自归位', () {
+      expect(
+        postPublishFailureReasonOf(const PostNotFoundException(message: 'x')),
+        PostPublishFailureReason.notFound,
+      );
+      expect(
+        postPublishFailureReasonOf(
+          const PostVersionConflictException(message: 'x'),
+        ),
+        PostPublishFailureReason.serverError,
+      );
+      expect(
+        postPublishFailureReasonOf(const ApiRateLimitException()),
+        PostPublishFailureReason.rateLimited,
+      );
+      expect(
+        postPublishFailureReasonOf(const ApiNetworkException()),
+        PostPublishFailureReason.networkError,
+      );
+    });
+
+    test('会话失效不上报（null）', () {
+      expect(
+        postPublishFailureReasonOf(const SessionExpiredException()),
+        isNull,
+      );
+    });
+  });
+}

test/features/community/post_compose_page_test.dart

@@ -0,0 +1,571 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
+import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/community_repository.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/community/post_analytics.dart';
+import 'package:patbond_flutter/features/community/post_compose_page.dart';
+
+import '../../helpers/community_test_helpers.dart';
+import '../../helpers/media_test_helpers.dart';
+
+/// 发布页（T3-17）：gating、两条提交路径（直接发布 / 存草稿退出）、
+/// 三条失败语义（40905 / 42203 / 网络可重试同键）、删格重排、草稿恢复与
+/// 发布漏斗埋点断言。
+void main() {
+  late FakeCommunityRepository repository;
+  late CommunityController controller;
+  late FakeMediaImagePicker picker;
+  late FakeMediaCompressor compressor;
+  late FakeDirectUploadClient direct;
+  late List<(String, Map<String, dynamic>?)> events;
+  late PostAnalytics analytics;
+  late List<CreatePostRequest> created;
+  late List<UpdatePostRequest> updated;
+  bool? popResult;
+  int uploadSeq = 0;
+
+  setUp(() {
+    repository = FakeCommunityRepository();
+    controller = CommunityController(repository: repository);
+    picker = FakeMediaImagePicker([
+      decodablePickedImage(seed: 1),
+      decodablePickedImage(seed: 2),
+      decodablePickedImage(seed: 3),
+    ]);
+    compressor = FakeMediaCompressor();
+    direct = FakeDirectUploadClient();
+    events = [];
+    analytics = PostAnalytics(
+      (name, [props]) async => events.add((name, props)),
+    );
+    created = [];
+    updated = [];
+    popResult = null;
+    uploadSeq = 0;
+
+    repository.onCreateMediaUpload = (_) async =>
+        credentials(assetId: 'a-${++uploadSeq}');
+    repository.onCompleteMediaUpload = (assetId) async =>
+        readyAsset(assetId: assetId);
+    repository.onCreatePost = (request, _) async {
+      created.add(request);
+      return Post.fromJson(samplePostJson(id: 'p-new', status: 'draft'));
+    };
+    repository.onUpdatePost = (postId, request) async {
+      updated.add(request);
+      return Post.fromJson(
+        samplePostJson(id: postId, version: request.version + 1),
+      );
+    };
+  });
+
+  List<Map<String, dynamic>?> eventsNamed(String name) =>
+      events.where((event) => event.$1 == name).map((e) => e.$2).toList();
+
+  MediaUploader uploaderFactory(
+    CommunityRepository repo,
+    PostAnalytics? postAnalytics,
+  ) => MediaUploader(
+    repository: repo,
+    picker: picker,
+    compressor: compressor,
+    directUpload: direct,
+    analytics: postAnalytics,
+  );
+
+  Future<void> pumpCompose(
+    WidgetTester tester, {
+    PostEntryPoint entryPoint = PostEntryPoint.createTab,
+  }) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: Builder(
+          builder: (context) => Scaffold(
+            body: Center(
+              child: ElevatedButton(
+                onPressed: () async {
+                  popResult = await Navigator.of(context).push<bool>(
+                    MaterialPageRoute<bool>(
+                      builder: (_) => PostComposePage(
+                        controller: controller,
+                        entryPoint: entryPoint,
+                        analytics: analytics,
+                        uploaderFactory: uploaderFactory,
+                      ),
+                    ),
+                  );
+                },
+                child: const Text('打开发布页'),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.tap(find.text('打开发布页'));
+    await tester.pumpAndSettle();
+  }
+
+  Finder publishButton() => find.widgetWithText(FilledButton, '发布');
+
+  bool publishEnabled(WidgetTester tester) =>
+      tester.widget<FilledButton>(publishButton()).onPressed != null;
+
+  Future<void> writeContent(
+    WidgetTester tester, [
+    String text = '带豆豆去了公园',
+  ]) async {
+    await tester.enterText(find.byType(TextField), text);
+    await tester.pump();
+  }
+
+  /// 选 [count] 张图并等上传完成。
+  Future<void> pickImages(WidgetTester tester, int count) async {
+    picker.results
+      ..clear()
+      ..addAll(List.generate(count, (i) => decodablePickedImage(seed: i + 1)));
+    await tester.tap(find.byIcon(Icons.add_photo_alternate_outlined));
+    await tester.pumpAndSettle();
+  }
+
+  group('gating（05 §2.2/§2.3 + 后端 content 必填）', () {
+    testWidgets('空正文禁用；输入即启用；post_create_started 只报一次', (tester) async {
+      await pumpCompose(tester);
+      expect(publishEnabled(tester), isFalse);
+
+      await writeContent(tester, '豆');
+      expect(publishEnabled(tester), isTrue);
+      await writeContent(tester, '豆豆');
+      expect(eventsNamed('post_create_started'), hasLength(1));
+      expect(eventsNamed('post_create_started').single, {
+        'entryPoint': 'create_tab',
+      });
+    });
+
+    testWidgets('图片在途禁用发布，全部 ready 才放行（孤儿防护）', (tester) async {
+      direct.manual = true;
+      await pumpCompose(tester, entryPoint: PostEntryPoint.feed);
+      await writeContent(tester);
+
+      picker.results
+        ..clear()
+        ..addAll([decodablePickedImage()]);
+      await tester.tap(find.byIcon(Icons.add_photo_alternate_outlined));
+      await tester.pumpAndSettle();
+
+      expect(publishEnabled(tester), isFalse);
+      // 页级汇总条在途可见。
+      expect(find.textContaining('正在上传'), findsOneWidget);
+
+      direct.calls.single.succeed();
+      await tester.pumpAndSettle();
+      expect(publishEnabled(tester), isTrue);
+      expect(find.textContaining('正在上传'), findsNothing);
+      // 选媒体也算首次输入（entryPoint 归因 feed）。
+      expect(eventsNamed('post_create_started').single, {'entryPoint': 'feed'});
+    });
+  });
+
+  group('直接发布路径（建草稿 → PATCH 迁移）', () {
+    testWidgets('纯文字帖：createPost(draft) + PATCH publish → pop(true) + 漏斗事件', (
+      tester,
+    ) async {
+      await pumpCompose(tester);
+      await writeContent(tester, '带豆豆去了公园');
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(created.single.status, PostStatus.draft);
+      expect(created.single.content, '带豆豆去了公园');
+      expect(created.single.category, PostCategory.general);
+      expect(created.single.media, isNull);
+      expect(updated.single.publish, isTrue);
+      expect(updated.single.version, 1);
+      // 建草稿刚落，media 与服务端一致 → PATCH 缺席不动。
+      expect(updated.single.media, isNull);
+      expect(popResult, isTrue);
+
+      final succeeded = eventsNamed('post_publish_succeeded').single!;
+      expect(succeeded['mediaCount'], 0);
+      expect(succeeded['topicCount'], 0);
+      expect(succeeded['textLengthBucket'], 'short');
+      expect(succeeded['fromDraft'], isFalse);
+      expect(eventsNamed('post_publish_failed'), isEmpty);
+    });
+
+    testWidgets('求助类目 + 两图：position 0..1、首图封面、mediaCount 2', (tester) async {
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(find.text('求助'));
+      await tester.pump();
+      await pickImages(tester, 2);
+
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(created.single.category, PostCategory.help);
+      final media = created.single.media!;
+      expect(media.map((item) => item.position), [0, 1]);
+      expect(media.map((item) => item.isCover), [true, false]);
+      expect(media.map((item) => item.assetId), ['a-1', 'a-2']);
+      expect(eventsNamed('post_publish_succeeded').single!['mediaCount'], 2);
+      // 媒体三段逐文件各一对。
+      expect(eventsNamed('post_media_upload_started'), hasLength(2));
+      expect(eventsNamed('post_media_upload_succeeded'), hasLength(2));
+    });
+
+    testWidgets('删格重排：3 图删中间 → position 重发号 0..1，弃掉的 asset 不被引用', (
+      tester,
+    ) async {
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await pickImages(tester, 3);
+      expect(find.byType(Image), findsNWidgets(3));
+
+      // 第二格删除角标（角标按格序渲染）。
+      await tester.tap(find.byIcon(Icons.close).at(1));
+      await tester.pumpAndSettle();
+      expect(find.byType(Image), findsNWidgets(2));
+
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      final media = created.single.media!;
+      expect(media.map((item) => item.position), [0, 1]);
+      expect(media.map((item) => item.assetId), ['a-1', 'a-3']);
+      expect(media.map((item) => item.isCover), [true, false]);
+    });
+  });
+
+  group('发布失败三语义', () {
+    testWidgets('网络失败：横幅可重试 + 同键重放（不重复建帖）', (tester) async {
+      var attempts = 0;
+      repository.onCreatePost = (request, _) async {
+        attempts += 1;
+        if (attempts == 1) throw const ApiNetworkException();
+        created.add(request);
+        return Post.fromJson(samplePostJson(id: 'p-new', status: 'draft'));
+      };
+
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(find.byType(InlineErrorBanner), findsOneWidget);
+      expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);
+      // 草稿还没落服务端 → 不谎称已保存。
+      expect(find.text('草稿已保存，可稍后继续发布'), findsNothing);
+      expect(eventsNamed('post_publish_failed').single, {
+        'failureReason': 'network_error',
+        'attemptSeq': 1,
+      });
+      expect(popResult, isNull);
+
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      // 两次尝试同一幂等键（服务端命中首帖，不重复建帖）。
+      expect(repository.idempotencyKeys, hasLength(2));
+      expect(repository.idempotencyKeys[0], isNotNull);
+      expect(repository.idempotencyKeys[0], repository.idempotencyKeys[1]);
+      expect(popResult, isTrue);
+    });
+
+    testWidgets('迁移发布失败：明确「草稿已保存」，重试只补 PATCH', (tester) async {
+      var patches = 0;
+      repository.onUpdatePost = (postId, request) async {
+        patches += 1;
+        if (patches == 1) throw const ApiNetworkException();
+        updated.add(request);
+        return Post.fromJson(samplePostJson(id: postId));
+      };
+
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(find.text('草稿已保存，可稍后继续发布'), findsOneWidget);
+      expect(created, hasLength(1));
+
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      // 草稿不重建，只重发 PATCH。
+      expect(created, hasLength(1));
+      expect(patches, 2);
+      expect(popResult, isTrue);
+      expect(eventsNamed('post_publish_failed').single!['attemptSeq'], 1);
+      expect(eventsNamed('post_publish_succeeded'), hasLength(1));
+    });
+
+    testWidgets('40905 同键异 hash：提示已重置提交标识，再点即换新键', (tester) async {
+      var attempts = 0;
+      repository.onCreatePost = (request, _) async {
+        attempts += 1;
+        if (attempts == 1) {
+          throw const IdempotencyMismatchException(message: 'mismatch');
+        }
+        created.add(request);
+        return Post.fromJson(samplePostJson(id: 'p-new', status: 'draft'));
+      };
+
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(find.text('提交内容与上次重试不一致，已重置提交标识，请再点一次「发布」'), findsOneWidget);
+      expect(eventsNamed('post_publish_failed').single, {
+        'failureReason': 'validation_error',
+        'attemptSeq': 1,
+        'errorCode': 40905,
+        'httpStatus': 409,
+      });
+
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(repository.idempotencyKeys, hasLength(2));
+      expect(
+        repository.idempotencyKeys[0],
+        isNot(repository.idempotencyKeys[1]),
+      );
+      expect(popResult, isTrue);
+    });
+
+    testWidgets('42203 asset 未 ready：提示等图片就绪 + media_upload_incomplete', (
+      tester,
+    ) async {
+      repository.onCreatePost = (_, _) async =>
+          throw const MediaNotReadyException(message: 'not ready');
+
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await pickImages(tester, 1);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(find.text('有图片还没上传完成，请等图片就绪后再发布'), findsOneWidget);
+      expect(eventsNamed('post_publish_failed').single, {
+        'failureReason': 'media_upload_incomplete',
+        'attemptSeq': 1,
+        'errorCode': 42203,
+        'httpStatus': 422,
+      });
+      expect(popResult, isNull);
+    });
+  });
+
+  group('存草稿退出路径', () {
+    testWidgets('「存草稿」按钮：createPost(draft) + post_draft_saved(manual)', (
+      tester,
+    ) async {
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await pickImages(tester, 1);
+      await tester.tap(find.widgetWithText(TextButton, '存草稿'));
+      await tester.pumpAndSettle();
+
+      expect(created.single.status, PostStatus.draft);
+      expect(updated, isEmpty);
+      expect(find.text('已保存草稿 ✓'), findsOneWidget);
+      expect(eventsNamed('post_draft_saved').single, {
+        'trigger': 'manual',
+        'mediaCount': 1,
+      });
+    });
+
+    testWidgets('「取消」有内容 → 保留草稿：on_exit 保存后离页', (tester) async {
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(find.widgetWithText(TextButton, '取消'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('保留草稿？'), findsOneWidget);
+      await tester.tap(find.widgetWithText(FilledButton, '保留'));
+      await tester.pumpAndSettle();
+
+      expect(created, hasLength(1));
+      expect(eventsNamed('post_draft_saved').single, {
+        'trigger': 'on_exit',
+        'mediaCount': 0,
+      });
+      expect(popResult, isFalse);
+      expect(find.byType(PostComposePage), findsNothing);
+    });
+
+    testWidgets('「不保留」：已落服务端的草稿软删 + post_deleted', (tester) async {
+      final deleted = <String>[];
+      repository.onDeletePost = (postId) async => deleted.add(postId);
+
+      await pumpCompose(tester);
+      await writeContent(tester);
+      // 先显式存一次草稿，使服务端已有草稿。
+      await tester.tap(find.widgetWithText(TextButton, '存草稿'));
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.widgetWithText(TextButton, '取消'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.widgetWithText(TextButton, '不保留'));
+      await tester.pumpAndSettle();
+
+      expect(deleted, ['p-new']);
+      expect(eventsNamed('post_deleted'), hasLength(1));
+      expect(popResult, isFalse);
+    });
+
+    testWidgets('「继续编辑」留在页内，不动服务端', (tester) async {
+      await pumpCompose(tester);
+      await writeContent(tester);
+      await tester.tap(find.widgetWithText(TextButton, '取消'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.widgetWithText(TextButton, '继续编辑'));
+      await tester.pumpAndSettle();
+
+      expect(find.byType(PostComposePage), findsOneWidget);
+      expect(created, isEmpty);
+      expect(
+        repository.calls.where((c) => c.startsWith('deletePost')),
+        isEmpty,
+      );
+    });
+
+    testWidgets('空表单「取消」直接离页，无弹窗无请求', (tester) async {
+      await pumpCompose(tester);
+      await tester.tap(find.widgetWithText(TextButton, '取消'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('保留草稿？'), findsNothing);
+      expect(created, isEmpty);
+      expect(popResult, isFalse);
+    });
+  });
+
+  group('草稿恢复（最小实现：最新一条）', () {
+    setUp(() {
+      repository.onListMyPosts = (status) async =>
+          postPage([sampleDraft(version: 3, content: '上次没写完的草稿')]);
+    });
+
+    testWidgets('进页恢复：提示条 + 正文预填 + 已有图片说明', (tester) async {
+      await pumpCompose(tester);
+
+      expect(find.text('已恢复上次草稿'), findsOneWidget);
+      expect(find.text('上次没写完的草稿'), findsOneWidget);
+      expect(find.textContaining('草稿已含 1 张图片'), findsOneWidget);
+      // 恢复不是用户输入 → 不发 post_create_started。
+      expect(eventsNamed('post_create_started'), isEmpty);
+      expect(repository.calls, contains('listMyPosts:draft'));
+    });
+
+    testWidgets('恢复后发布：不再建草稿，PATCH 带 version 与 fromDraft=true', (tester) async {
+      await pumpCompose(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(created, isEmpty);
+      expect(updated.single.version, 3);
+      expect(updated.single.publish, isTrue);
+      // 未重新选图 → media 缺席不动（服务端既有图保留）。
+      expect(updated.single.media, isNull);
+      final succeeded = eventsNamed('post_publish_succeeded').single!;
+      expect(succeeded['fromDraft'], isTrue);
+      expect(succeeded['mediaCount'], 1);
+      expect(popResult, isTrue);
+    });
+
+    testWidgets('恢复后重新选图：PATCH 整组替换', (tester) async {
+      await pumpCompose(tester);
+      await pickImages(tester, 1);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(updated.single.media!.map((item) => item.assetId), ['a-1']);
+      expect(eventsNamed('post_publish_succeeded').single!['mediaCount'], 1);
+    });
+
+    testWidgets('40902 乐观锁：自动取新 version 重提一次即成功', (tester) async {
+      var patches = 0;
+      repository.onUpdatePost = (postId, request) async {
+        patches += 1;
+        if (patches == 1) {
+          throw const PostVersionConflictException(message: 'stale');
+        }
+        updated.add(request);
+        return Post.fromJson(samplePostJson(id: postId));
+      };
+      repository.onGetPost = (postId) async => Post.fromJson(
+        samplePostJson(id: postId, status: 'draft', version: 9),
+      );
+
+      await pumpCompose(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+
+      expect(updated.single.version, 9);
+      expect(eventsNamed('post_publish_failed'), isEmpty);
+      expect(popResult, isTrue);
+    });
+
+    testWidgets('「清空」清掉恢复内容与提示条', (tester) async {
+      await pumpCompose(tester);
+      await tester.tap(find.widgetWithText(TextButton, '清空'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('已恢复上次草稿'), findsNothing);
+      expect(find.text('上次没写完的草稿'), findsNothing);
+      expect(publishEnabled(tester), isFalse);
+    });
+
+    testWidgets('草稿恢复失败静默降级为新建（不打断发布）', (tester) async {
+      repository.onListMyPosts = (_) async => throw const ApiNetworkException();
+
+      await pumpCompose(tester);
+      expect(find.text('已恢复上次草稿'), findsNothing);
+      expect(find.byType(InlineErrorBanner), findsNothing);
+
+      await writeContent(tester);
+      await tester.tap(publishButton());
+      await tester.pumpAndSettle();
+      expect(created, hasLength(1));
+      expect(popResult, isTrue);
+    });
+  });
+
+  group('页面结构（05 §2.3）', () {
+    testWidgets('AppBar 三件套 + 媒体编辑格 + 类目二选 + 位置占位', (tester) async {
+      await pumpCompose(tester);
+
+      expect(find.text('发布动态'), findsOneWidget);
+      expect(find.widgetWithText(TextButton, '取消'), findsOneWidget);
+      expect(find.widgetWithText(TextButton, '存草稿'), findsOneWidget);
+      expect(publishButton(), findsOneWidget);
+      expect(find.byType(PostMediaEditGrid), findsOneWidget);
+      expect(find.text('日常分享'), findsOneWidget);
+      expect(find.text('求助'), findsOneWidget);
+      // ai_creation 是 M4 预留读侧值，不给提交面。
+      expect(find.textContaining('AI'), findsNothing);
+      await tester.drag(find.byType(ListView), const Offset(0, -240));
+      await tester.pump();
+      await tester.tap(find.text('添加位置（选填）'));
+      await tester.pump();
+      expect(find.text('位置功能即将上线'), findsOneWidget);
+    });
+
+    testWidgets('正文 1000 字上限计数器在位', (tester) async {
+      await pumpCompose(tester);
+      await writeContent(tester, '豆豆');
+      expect(find.text('2/1000'), findsOneWidget);
+    });
+  });
+}

test/features/home/home_greeting_test.dart

@@ -0,0 +1,144 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/home/home_page.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+import 'package:patbond_flutter/state/app_state.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+import '../../helpers/community_test_helpers.dart';
+
+/// T3.5-10 首页问候语真实化。
+///
+/// ADR-022 决策 D3.5-1：本迭代**只做问候语**，天气 / 位置 / 圈子 / 促销卡
+/// 刻意保留为 demo 占位——本文件同时钉住「保留项仍在」，避免后续有人以
+/// 「顺手清理」为名越出拍板范围（真要动它们得先改 ADR）。
+void main() {
+  late FakeCommunityRepository community;
+  late CommunityController feed;
+
+  setUp(() {
+    community = FakeCommunityRepository();
+    community.onFeed = (_, _) async => feedPage(const []);
+    feed = CommunityController(repository: community);
+  });
+
+  Future<ProfileController> pumpHome(
+    WidgetTester tester, {
+    required FakeAuthRepository auth,
+  }) async {
+    tester.view.physicalSize = const Size(700, 1600);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.reset);
+    final profile = ProfileController(
+      authRepository: auth,
+      communityRepository: community,
+    );
+    addTearDown(profile.dispose);
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: Scaffold(
+          body: HomePage(
+            appState: AppState(),
+            communityController: feed,
+            profileController: profile,
+            onOpenServices: (_) {},
+            onOpenCompose: () {},
+          ),
+        ),
+      ),
+    );
+    return profile;
+  }
+
+  /// 当前时段问候前缀（与页面实现同一套阈值；避免测试跟着挂钟漂移）。
+  String greetingPrefix([DateTime? now]) {
+    final hour = (now ?? DateTime.now()).hour;
+    if (hour < 6) return '夜深了';
+    if (hour < 11) return '早上好';
+    if (hour < 14) return '中午好';
+    if (hour < 18) return '下午好';
+    return '晚上好';
+  }
+
+  testWidgets('有昵称：问候语用昵称，demo 宠物名「豆豆」不再出现', (tester) async {
+    final profile = await pumpHome(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => buildProfile(username: 'llx', nickname: '小柴'),
+      ),
+    );
+    await profile.refresh();
+    await tester.pumpAndSettle();
+
+    expect(find.text('${greetingPrefix()}，小柴 👋'), findsOneWidget);
+    expect(find.textContaining('豆豆'), findsNothing);
+  });
+
+  testWidgets('无昵称：问候语回退 username（与资料页同规则）', (tester) async {
+    final profile = await pumpHome(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => buildProfile(username: 'llx'),
+      ),
+    );
+    await profile.refresh();
+    await tester.pumpAndSettle();
+
+    expect(find.text('${greetingPrefix()}，llx 👋'), findsOneWidget);
+  });
+
+  testWidgets('资料未到手：只问候不称名（不编造假名）', (tester) async {
+    await pumpHome(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => throw const ApiNetworkException('断网'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('${greetingPrefix()} 👋'), findsOneWidget);
+    // 不出现「问候，某某」形态（更不会退回 demo 宠物名）。
+    expect(find.textContaining('${greetingPrefix()}，'), findsNothing);
+  });
+
+  testWidgets('改昵称后首页同步（与资料页共用同一控制器，无需手动刷新）', (tester) async {
+    final auth = FakeAuthRepository(
+      meHandler: () async => buildProfile(username: 'llx'),
+      updateMeHandler: (_) async =>
+          buildProfile(username: 'llx', nickname: '小柴'),
+    );
+    final profile = await pumpHome(tester, auth: auth);
+    await profile.refresh();
+    await tester.pumpAndSettle();
+    expect(find.text('${greetingPrefix()}，llx 👋'), findsOneWidget);
+
+    await profile.save(
+      const UpdateMeRequest(nickname: PatchField<String>.value('小柴')),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('${greetingPrefix()}，小柴 👋'), findsOneWidget);
+  });
+
+  testWidgets('刻意保留的 demo 占位仍在（ADR-022 钉死的范围）', (tester) async {
+    final profile = await pumpHome(
+      tester,
+      auth: FakeAuthRepository(meHandler: () async => buildProfile()),
+    );
+    await profile.refresh();
+    await tester.pumpAndSettle();
+
+    // 天气 / 位置（外部服务未接）。
+    expect(find.text('北京 · 朝阳区'), findsOneWidget);
+    expect(find.text('28°C 晴'), findsOneWidget);
+    // 圈子 = 话题（ADR-018 剪出）。
+    expect(find.text('柴犬圈'), findsOneWidget);
+    // 促销卡（M5 服务域）。
+    expect(find.text('新用户首单立减 ¥20'), findsOneWidget);
+  });
+}

test/features/home/home_page_test.dart

@@ -8,6 +8,7 @@ import 'package:patbond_flutter/core/widgets/feed_skeleton.dart';
 import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
 import 'package:patbond_flutter/core/widgets/post_card.dart';
 import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
 import 'package:patbond_flutter/features/community/community_models.dart';
 import 'package:patbond_flutter/features/community/feed_analytics.dart';
 import 'package:patbond_flutter/features/home/home_page.dart';
@@ -38,16 +39,23 @@ void main() {
   late CommunityController controller;
   late List<(String, Map<String, dynamic>?)> events;
   late FeedAnalytics analytics;
-  late int createTaps;
+  late int composeTaps;
+  late List<String> openedPosts;
 
   setUp(() {
     repository = FakeCommunityRepository();
-    controller = CommunityController(repository: repository);
     events = [];
+    controller = CommunityController(
+      repository: repository,
+      interactionAnalytics: CommunityInteractionAnalytics(
+        (name, [props]) async => events.add((name, props)),
+      ),
+    );
     analytics = FeedAnalytics(
       (name, [props]) async => events.add((name, props)),
     );
-    createTaps = 0;
+    composeTaps = 0;
+    openedPosts = [];
   });
 
   List<Map<String, dynamic>?> eventsNamed(String name) =>
@@ -64,7 +72,8 @@ void main() {
             feedAnalytics: analytics,
             isActive: isActive,
             onOpenServices: (_) {},
-            onOpenCreate: () => createTaps++,
+            onOpenCompose: () => composeTaps++,
+            onOpenPost: openedPosts.add,
           ),
         ),
       ),
@@ -89,7 +98,7 @@ void main() {
     expect(find.byType(FeedSkeleton), findsNothing);
   });
 
-  testWidgets('四态 · empty：空态插画 + 「发布第一条」CTA 去创作', (tester) async {
+  testWidgets('四态 · empty：空态插画 + 「发布第一条」CTA 进发布页', (tester) async {
     repository.onFeed = (_, _) async => feedPage(const []);
 
     await pumpHome(tester);
@@ -99,7 +108,7 @@ void main() {
     await tester.drag(list(), const Offset(0, -300));
     await tester.pump();
     await tester.tap(find.text('发布第一条'));
-    expect(createTaps, 1);
+    expect(composeTaps, 1);
   });
 
   testWidgets('四态 · error：横幅 + 重试恢复 ready，feed_load_failed 上报', (tester) async {
@@ -361,7 +370,7 @@ void main() {
     expect(eventsNamed('feed_viewed'), hasLength(2));
   });
 
-  testWidgets('T3-14 取舍：整卡点按提示详情接入中（不导航 demo 详情）', (tester) async {
+  testWidgets('T3-15 导航接通：整卡与评论钮点按回调 onOpenPost（占位提示移除）', (tester) async {
     repository.onFeed = (_, _) async => feedPage([textCard('p-1')]);
 
     await pumpHome(tester);
@@ -371,7 +380,72 @@ void main() {
 
     await tester.tap(find.text('动态内容 p-1'));
     await tester.pump();
-    expect(find.text('帖子详情正在接入真实数据，敬请期待'), findsOneWidget);
+    expect(find.text('帖子详情正在接入真实数据，敬请期待'), findsNothing);
+    expect(openedPosts, ['p-1']);
+
+    await tester.tap(find.byIcon(Icons.chat_bubble_outline));
+    await tester.pump();
+    expect(openedPosts, ['p-1', 'p-1']);
+  });
+
+  testWidgets('T3-16 互动接线：点赞乐观翻转即时显示，成功报 post_liked(source=feed)', (
+    tester,
+  ) async {
+    repository.onFeed = (_, _) async => feedPage([
+      FeedCard.fromJson({
+        ...sampleFeedCardJson(likeCount: 6),
+        'coverImage': null,
+        'mediaCount': 0,
+      }),
+    ]);
+    final like = Completer<LikeState>();
+    repository.onLikeToggle = (_, _) => like.future;
+
+    await pumpHome(tester);
+    await tester.pumpAndSettle();
+    await tester.drag(list(), const Offset(0, -800));
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byIcon(Icons.favorite_border));
+    await tester.pump();
+    // 乐观翻转：请求未回已 +1（同帧反馈）。
+    expect(find.text('7'), findsOneWidget);
+    expect(repository.calls, contains('like:p-1'));
+
+    like.complete(const LikeState(liked: true, likeCount: 7));
+    await tester.pumpAndSettle();
+    expect(eventsNamed('post_liked'), [
+      {'source': 'feed'},
+    ]);
+    expect(find.text('7'), findsOneWidget);
+  });
+
+  testWidgets('T3-16 互动接线：点赞失败回滚 + SnackBar「操作失败，请重试」', (tester) async {
+    repository.onFeed = (_, _) async => feedPage([
+      FeedCard.fromJson({
+        ...sampleFeedCardJson(likeCount: 6),
+        'coverImage': null,
+        'mediaCount': 0,
+      }),
+    ]);
+    final like = Completer<LikeState>();
+    repository.onLikeToggle = (_, _) => like.future;
+
+    await pumpHome(tester);
+    await tester.pumpAndSettle();
+    await tester.drag(list(), const Offset(0, -800));
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byIcon(Icons.favorite_border));
+    await tester.pump();
+    expect(find.text('7'), findsOneWidget);
+
+    like.completeError(const ApiNetworkException());
+    await tester.pumpAndSettle();
+    // 回滚成对恢复 + SnackBar；不报 post_liked。
+    expect(find.text('6'), findsOneWidget);
+    expect(find.text('操作失败，请重试'), findsOneWidget);
+    expect(eventsNamed('post_liked'), isEmpty);
   });
 
   testWidgets('搜索词过滤已加载卡片；无命中显搜索空态', (tester) async {

test/features/main/main_shell_publish_test.dart

@@ -0,0 +1,87 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/app/app.dart';
+import 'package:patbond_flutter/core/widgets/post_card.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+import '../../helpers/community_test_helpers.dart';
+import '../../helpers/media_test_helpers.dart';
+import '../../helpers/pet_test_helpers.dart';
+
+/// 主壳发布闭环（T3-17）：创作 Tab 入口 → 发布页 → 发布成功 →
+/// 回首页 Feed 并整体刷新 → 新帖置顶可见（M3 验收「发布后可见」的
+/// 客户端侧断言；跨客户端可见性走 compose 真链路实测，见 26 号报告 §5）。
+void main() {
+  testWidgets('创作 Tab「发布动态」→ 发布 → 回首页 Feed 刷新，新帖置顶', (tester) async {
+    SharedPreferences.setMockInitialValues({});
+    final session = SessionManager(store: InMemoryTokenStore())
+      ..markAuthenticated();
+    final repository = FakeCommunityRepository();
+
+    var published = false;
+    repository.onFeed = (_, _) async => feedPage(
+      published
+          ? [
+              FeedCard.fromJson({
+                ...sampleFeedCardJson(id: 'p-new'),
+                'contentPreview': '刚发布的动态',
+              }),
+              sampleFeedCard(id: 'p-old'),
+            ]
+          : [sampleFeedCard(id: 'p-old')],
+    );
+    repository.onCreatePost = (request, _) async =>
+        Post.fromJson(samplePostJson(id: 'p-new', status: 'draft'));
+    repository.onUpdatePost = (postId, request) async {
+      published = true;
+      return Post.fromJson(samplePostJson(id: postId, version: 2));
+    };
+
+    await tester.pumpWidget(
+      App(
+        sessionManager: session,
+        authRepository: FakeAuthRepository(),
+        petsRepository: FakePetsRepository(),
+        communityRepository: repository,
+        mediaUploaderFactory: (repo, analytics) => MediaUploader(
+          repository: repo,
+          picker: FakeMediaImagePicker([decodablePickedImage()]),
+          compressor: FakeMediaCompressor(),
+          directUpload: FakeDirectUploadClient(),
+          analytics: analytics,
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    // 创作 Tab → 发布页（entryPoint=create_tab）。
+    await tester.tap(find.text('创作'));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('发布动态'));
+    await tester.pumpAndSettle();
+    expect(find.widgetWithText(TextButton, '存草稿'), findsOneWidget);
+
+    await tester.enterText(find.byType(TextField).first, '刚发布的动态');
+    await tester.pump();
+    await tester.tap(find.widgetWithText(FilledButton, '发布'));
+    await tester.pumpAndSettle();
+
+    // 回首页 Feed（发布页已出栈）+ 整体刷新 + 新帖置顶。
+    expect(find.widgetWithText(TextButton, '存草稿'), findsNothing);
+    expect(find.text('已发布，去首页看看吧 🐾'), findsOneWidget);
+    expect(
+      repository.calls.where((call) => call.startsWith('feed:')),
+      hasLength(2),
+    );
+    // 卡片区在首页家具（story 环 / 促销位）之下，滚到可见后断言首位。
+    await tester.drag(find.byType(ListView).first, const Offset(0, -320));
+    await tester.pumpAndSettle();
+    final cards = tester.widgetList<PostCard>(find.byType(PostCard)).toList();
+    expect(cards.first.card.id, 'p-new');
+    expect(find.text('刚发布的动态'), findsWidgets);
+  });
+}

test/features/pets/care_reminder_form_page_test.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/features/pets/care_reminder_form_page.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
 import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
@@ -34,6 +36,10 @@ void main() {
     await tester.pumpWidget(
       MaterialApp(
         theme: buildAppTheme(),
+        // M3.5-01：与生产一致挂 zh-CN delegate。
+        localizationsDelegates: appLocalizationsDelegates,
+        supportedLocales: appSupportedLocales,
+        locale: appLocale,
         home: Builder(
           builder: (context) => Scaffold(
             body: Center(
@@ -67,7 +73,7 @@ void main() {
     );
     await tester.tap(find.text('到期日期'));
     await tester.pumpAndSettle();
-    await tester.tap(find.text('OK'));
+    await tester.tap(find.text('确定'));
     await tester.pumpAndSettle();
   }
 
@@ -124,4 +130,36 @@ void main() {
     expect(failed[1]!['failureReason'], 'network_error');
     expect(failed[1]!['attemptSeq'], 2);
   });
+
+  group('M3.5-02 · 到期日期录入（firstDate 就是今天的那一格）', () {
+    testWidgets('未选日期时也有「今天」快捷键；一键落今天并清掉必填校验错', (tester) async {
+      await pumpForm(tester);
+
+      // 先触发必填校验错。
+      await tester.tap(find.text('保存提醒'));
+      await tester.pumpAndSettle();
+      expect(find.text('未选择'), findsOneWidget);
+
+      await tester.tap(find.text('今天'));
+      await tester.pumpAndSettle();
+
+      expect(find.text(dateToJson(DateTime.now())), findsOneWidget);
+      expect(find.text('未选择'), findsNothing);
+      expect(find.text('选择日期'), findsNothing);
+    });
+
+    testWidgets('业务约束不变：firstDate 今天（不许补记过去）、lastDate 五年后', (tester) async {
+      await pumpForm(tester);
+
+      await tester.tap(find.widgetWithText(ListTile, '到期日期'));
+      await tester.pumpAndSettle();
+
+      final dialog = tester.widget<DatePickerDialog>(
+        find.byType(DatePickerDialog),
+      );
+      expect(dialog.firstDate, dateOnly(DateTime.now()));
+      expect(dialog.lastDate, DateTime(DateTime.now().year + 5));
+      expect(find.text('选择日期'), findsOneWidget);
+    });
+  });
 }

test/features/pets/care_reminders_page_test.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/features/pets/care_reminder_form_page.dart';
@@ -39,6 +40,11 @@ void main() {
     await tester.pumpWidget(
       MaterialApp(
         theme: buildAppTheme(),
+        // M3.5-01：与生产一致挂 zh-CN delegate，日期选择器等内置组件文案
+        // 才是用户真机看到的中文。
+        localizationsDelegates: appLocalizationsDelegates,
+        supportedLocales: appSupportedLocales,
+        locale: appLocale,
         home: const Scaffold(body: Text('详情基底')),
       ),
     );
@@ -206,7 +212,7 @@ void main() {
     );
     await tester.tap(find.text('到期日期'));
     await tester.pumpAndSettle();
-    await tester.tap(find.text('OK'));
+    await tester.tap(find.text('确定'));
     await tester.pumpAndSettle();
     await tester.tap(find.text('保存提醒'));
     await tester.pumpAndSettle();

test/features/pets/health_event_form_page_test.dart

@@ -1,7 +1,11 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/app_date_picker.dart';
 import 'package:patbond_flutter/features/pets/health_event_form_page.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
 import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
@@ -34,6 +38,11 @@ void main() {
     await tester.pumpWidget(
       MaterialApp(
         theme: buildAppTheme(),
+        // M3.5-01：与生产一致挂 zh-CN delegate，否则测里的日期选择器是
+        // 英文兜底，测不出用户真机看到的东西。
+        localizationsDelegates: appLocalizationsDelegates,
+        supportedLocales: appSupportedLocales,
+        locale: appLocale,
         home: Builder(
           builder: (context) => Scaffold(
             body: Center(
@@ -192,4 +201,77 @@ void main() {
     expect(failed[2]!['failureReason'], 'network_error');
     expect(failed[2]!['attemptSeq'], 3);
   });
+
+  group('M3.5-02 · 日期录入（用户误录 2026-04 的那一格）', () {
+    testWidgets('点「今天」直接落今天，不开弹窗；同时算首次输入触发 started', (tester) async {
+      await pumpForm(tester);
+
+      final expected = dateToJson(DateTime.now());
+      // 先把日期改成远月，模拟用户翻错月份后的状态。
+      await tester.tap(find.widgetWithText(ListTile, '发生日期'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.byIcon(Icons.edit_outlined));
+      await tester.pumpAndSettle();
+      await tester.enterText(
+        find.descendant(
+          of: find.byType(DatePickerDialog),
+          matching: find.byType(TextField),
+        ),
+        '2026/04/09',
+      );
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+      expect(find.text('2026-04-09'), findsOneWidget);
+
+      // 一键回今天：不经日期选择器。
+      await tester.tap(find.text('今天'));
+      await tester.pumpAndSettle();
+
+      expect(find.text(expected), findsOneWidget);
+      expect(find.text('选择日期'), findsNothing);
+      expect(eventsOf('health_record_create_started'), hasLength(1));
+    });
+
+    testWidgets('选择器为中文，且业务约束不变（firstDate 1990 / lastDate 今天，不许未来）', (
+      tester,
+    ) async {
+      await pumpForm(tester);
+
+      await tester.tap(find.widgetWithText(ListTile, '发生日期'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('选择日期'), findsOneWidget);
+      expect(find.text('确定'), findsOneWidget);
+      expect(find.text('取消'), findsOneWidget);
+      // 手输快路可达（原生 calendarOnly 会砍掉它）。
+      expect(find.byIcon(Icons.edit_outlined), findsOneWidget);
+
+      final dialog = tester.widget<DatePickerDialog>(
+        find.byType(DatePickerDialog),
+      );
+      expect(dialog.firstDate, DateTime(1990));
+      expect(dialog.lastDate, dateOnly(DateTime.now()));
+    });
+
+    testWidgets('提交中禁用「今天」快捷键', (tester) async {
+      final gate = Completer<HealthEvent>();
+      repository.createHealthEventHandler = (petId, req) => gate.future;
+      await pumpForm(tester);
+      await fillValid(tester);
+
+      await tester.tap(find.text('保存记录'));
+      await tester.pump();
+
+      expect(
+        tester
+            .widget<TextButton>(find.widgetWithText(TextButton, '今天'))
+            .onPressed,
+        isNull,
+      );
+
+      gate.complete(buildHealthEvent('he-1'));
+      await tester.pumpAndSettle();
+    });
+  });
 }

test/features/pets/health_record_display_test.dart

@@ -277,4 +277,30 @@ void main() {
       expect(reminderStatusColor(dismissed, now), AppColors.muted);
     });
   });
+
+  group('M3.5-03 · monthlyExpenseCardLabel（花费卡展示实际月份）', () {
+    test('同年只给月份，卡片一行放得下（不再硬编码「本月花费」）', () {
+      final now = DateTime(2026, 9, 10);
+      expect(monthlyExpenseCardLabel('2026-09', now: now), '9 月花费');
+      // 用户误录场景：记录落在 4 月，卡片就该明说是 4 月，而不是「本月」。
+      expect(monthlyExpenseCardLabel('2026-04', now: now), '4 月花费');
+      expect(monthlyExpenseCardLabel('2026-12', now: now), '12 月花费');
+      expect(monthlyExpenseCardLabel('2026-01', now: now), '1 月花费');
+    });
+
+    test('跨年（服务端归月年份 ≠ 设备当前年份）补年份消歧', () {
+      // 设备已跨到 2027-01，服务端 tz 窗口仍落在 2026-12。
+      final now = DateTime(2027, 1, 1);
+      expect(monthlyExpenseCardLabel('2026-12', now: now), '2026/12 花费');
+    });
+
+    test('月份串非法退回「本月花费」（不崩、不显示脏值）', () {
+      final now = DateTime(2026, 9, 10);
+      expect(monthlyExpenseCardLabel('', now: now), '本月花费');
+      expect(monthlyExpenseCardLabel('2026-9', now: now), '本月花费');
+      expect(monthlyExpenseCardLabel('2026-13', now: now), '本月花费');
+      expect(monthlyExpenseCardLabel('2026-00', now: now), '本月花费');
+      expect(monthlyExpenseCardLabel('2026-09-01', now: now), '本月花费');
+    });
+  });
 }

test/features/pets/pet_avatar_wiring_test.dart

@@ -0,0 +1,323 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/pets/pet_detail_page.dart';
+import 'package:patbond_flutter/features/pets/pet_display.dart';
+import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
+import 'package:patbond_flutter/features/pets/pet_models.dart';
+import 'package:patbond_flutter/features/pets/pets_controller.dart';
+import 'package:patbond_flutter/features/pets/pets_page.dart';
+
+import '../../helpers/community_test_helpers.dart';
+import '../../helpers/media_test_helpers.dart';
+import '../../helpers/pet_test_helpers.dart';
+
+/// T3.5-09 宠物头像接线。
+///
+/// 两条不变量在这里守住：
+/// 1. **权限按 WRITE 档呈现**（owner + caregiver 有入口，viewer 没有），与
+///    资料编辑（MANAGE，仅 owner）不同档。
+/// 2. **纯头像 PATCH 不夹带资料字段**——夹带会把服务端定档抬到 MANAGE，
+///    caregiver 立刻 403。
+void main() {
+  const signedAvatar =
+      'https://minio.local/patbond-media/pet_avatar/2026/09/a-1'
+      '?X-Amz-Signature=sig';
+
+  late FakePetsRepository pets;
+  late PetsController controller;
+  late FakeCommunityRepository community;
+  late FakeMediaImagePicker picker;
+  late FakeMediaCompressor compressor;
+  late FakeDirectUploadClient direct;
+
+  setUp(() {
+    pets = FakePetsRepository();
+    controller = PetsController(repository: pets);
+    community = FakeCommunityRepository();
+    picker = FakeMediaImagePicker([decodablePickedImage()]);
+    compressor = FakeMediaCompressor();
+    direct = FakeDirectUploadClient();
+    community.onCreateMediaUpload = (_) async => credentials();
+    community.onCompleteMediaUpload = (assetId) async =>
+        readyAsset(assetId: assetId);
+  });
+
+  MediaUploader buildUploader(MediaPurpose purpose) => MediaUploader(
+    repository: community,
+    purpose: purpose,
+    picker: picker,
+    compressor: compressor,
+    directUpload: direct,
+    maxImages: 1,
+    maxConcurrentUploads: 1,
+  );
+
+  Future<void> pumpDetail(
+    WidgetTester tester, {
+    bool withUploader = true,
+  }) async {
+    tester.view.physicalSize = const Size(700, 2400);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.reset);
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: const Scaffold(body: Text('列表基底')),
+      ),
+    );
+    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
+    unawaited(
+      navigator.push(
+        MaterialPageRoute<void>(
+          builder: (_) => PetDetailPage(
+            controller: controller,
+            petId: 'p-1',
+            avatarUploaderBuilder: withUploader ? buildUploader : null,
+          ),
+        ),
+      ),
+    );
+    await tester.pump();
+  }
+
+  group('契约字段', () {
+    test('Pet.avatarUrl 解析（无头像为 null；不外露 avatarAssetId）', () {
+      expect(buildPet('p-1').avatarUrl, isNull);
+      expect(
+        buildPet('p-1', overrides: {'avatarUrl': signedAvatar}).avatarUrl,
+        signedAvatar,
+      );
+    });
+
+    test('UpdatePetRequest：只带头像时载荷仅 version + avatarAssetId', () {
+      const request = UpdatePetRequest(
+        version: 3,
+        avatarAssetId: PatchField<String>.value('a-1'),
+      );
+      expect(request.toJson(), {'version': 3, 'avatarAssetId': 'a-1'});
+    });
+
+    test('UpdatePetRequest：清除头像为显式 null；缺省则键不出现', () {
+      expect(
+        const UpdatePetRequest(
+          version: 3,
+          avatarAssetId: PatchField<String>.clear(),
+        ).toJson(),
+        {'version': 3, 'avatarAssetId': null},
+      );
+      final absent = const UpdatePetRequest(version: 3, name: '豆豆').toJson();
+      expect(absent, {'version': 3, 'name': '豆豆'});
+      expect(
+        absent.containsKey('avatarAssetId'),
+        isFalse,
+        reason: '改名请求不该顺手把头像清掉',
+      );
+    });
+
+    test('头像写入失败文案分层（40405 / 42203 与 40401 区分开）', () {
+      expect(
+        petAvatarSaveErrorMessage(
+          const ApiBusinessException(
+            code: ApiCodes.mediaNotFound,
+            message: 'x',
+          ),
+        ),
+        '头像已失效，请重新上传',
+      );
+      expect(
+        petAvatarSaveErrorMessage(
+          const ApiBusinessException(
+            code: ApiCodes.mediaNotReady,
+            message: 'x',
+          ),
+        ),
+        '头像还没上传完，请稍后重试',
+      );
+      expect(
+        petAvatarSaveErrorMessage(
+          const ApiBusinessException(
+            code: ApiCodes.petAccessDenied,
+            message: 'x',
+          ),
+        ),
+        '你没有修改该宠物头像的权限',
+      );
+    });
+  });
+
+  group('权限呈现（WRITE 档）', () {
+    testWidgets('owner：头像可点 + 铅笔角标', (tester) async {
+      pets.getPetHandler = (_) async => buildPet('p-1');
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      final avatar = tester.widget<PetAvatar>(find.byType(PetAvatar));
+      expect(avatar.showEditBadge, isTrue);
+      expect(avatar.onTap, isNotNull);
+      expect(avatar.semanticLabel, '更换宠物头像');
+    });
+
+    testWidgets('caregiver：头像入口在（WRITE 档），但资料编辑入口不在（MANAGE 档）', (tester) async {
+      pets.getPetHandler = (_) async =>
+          buildPet('p-1', overrides: {'myRole': 'caregiver'});
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      final avatar = tester.widget<PetAvatar>(find.byType(PetAvatar));
+      expect(avatar.showEditBadge, isTrue, reason: 'ADR-022：头像属 WRITE 档');
+      expect(avatar.onTap, isNotNull);
+      expect(find.text('编辑资料'), findsNothing, reason: '改档案仍是 MANAGE 档');
+    });
+
+    testWidgets('viewer：头像不可点、无角标', (tester) async {
+      pets.getPetHandler = (_) async =>
+          buildPet('p-1', overrides: {'myRole': 'viewer'});
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      final avatar = tester.widget<PetAvatar>(find.byType(PetAvatar));
+      expect(avatar.showEditBadge, isFalse);
+      expect(avatar.onTap, isNull);
+    });
+
+    testWidgets('未装配上传能力：owner 也不渲染头像入口', (tester) async {
+      pets.getPetHandler = (_) async => buildPet('p-1');
+      await pumpDetail(tester, withUploader: false);
+      await tester.pumpAndSettle();
+
+      final avatar = tester.widget<PetAvatar>(find.byType(PetAvatar));
+      expect(avatar.showEditBadge, isFalse);
+      expect(avatar.onTap, isNull);
+    });
+  });
+
+  group('上传与清除', () {
+    testWidgets('无头像 → 点头像直接上传 → PATCH 只带 version + avatarAssetId', (
+      tester,
+    ) async {
+      pets.getPetHandler = (_) async => buildPet('p-1', version: 3);
+      UpdatePetRequest? captured;
+      pets.updatePetHandler = (petId, request) async {
+        captured = request;
+        return buildPet(
+          'p-1',
+          version: 4,
+          overrides: {'avatarUrl': signedAvatar},
+        );
+      };
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byType(PetAvatar));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('使用这张'));
+      await tester.pumpAndSettle();
+
+      expect(community.lastMediaUploadRequest!.purpose, MediaPurpose.petAvatar);
+      expect(captured!.toJson(), {'version': 3, 'avatarAssetId': 'a-1'});
+      expect(find.text('头像已更新'), findsOneWidget);
+      // 详情页头像随即换成服务端回显的现签 URL。
+      expect(
+        tester.widget<PetAvatar>(find.byType(PetAvatar)).url,
+        signedAvatar,
+      );
+    });
+
+    testWidgets('已有头像 → 点头像给「更换 / 移除」；移除发显式 null', (tester) async {
+      pets.getPetHandler = (_) async =>
+          buildPet('p-1', version: 5, overrides: {'avatarUrl': signedAvatar});
+      UpdatePetRequest? captured;
+      pets.updatePetHandler = (petId, request) async {
+        captured = request;
+        return buildPet('p-1', version: 6);
+      };
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byType(PetAvatar));
+      await tester.pumpAndSettle();
+      expect(find.text('更换头像'), findsOneWidget);
+      expect(find.text('移除头像'), findsOneWidget);
+
+      await tester.tap(find.text('移除头像'));
+      await tester.pumpAndSettle();
+
+      final payload = captured!.toJson();
+      expect(payload.containsKey('avatarAssetId'), isTrue);
+      expect(payload['avatarAssetId'], isNull);
+      expect(payload['version'], 5);
+      expect(payload.keys.length, 2, reason: '不得夹带任何资料字段（否则抬到 MANAGE 档）');
+      expect(find.text('已移除头像'), findsOneWidget);
+      expect(tester.widget<PetAvatar>(find.byType(PetAvatar)).url, isNull);
+    });
+
+    testWidgets('40902 版本冲突：提示 + 自动重取档案（不静默重放）', (tester) async {
+      var getCalls = 0;
+      pets.getPetHandler = (_) async {
+        getCalls += 1;
+        return buildPet('p-1', version: getCalls == 1 ? 3 : 9);
+      };
+      pets.updatePetHandler = (petId, request) async =>
+          throw const PetVersionConflictException(message: 'stale');
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byType(PetAvatar));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('使用这张'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('档案已被更新，请重新操作'), findsOneWidget);
+      expect(getCalls, 2, reason: '冲突后重取档案拿新 version');
+    });
+
+    testWidgets('42203 头像未就绪：SnackBar 提示，不改动头像', (tester) async {
+      pets.getPetHandler = (_) async => buildPet('p-1', version: 3);
+      pets.updatePetHandler = (petId, request) async =>
+          throw const ApiBusinessException(
+            code: ApiCodes.mediaNotReady,
+            message: 'uploading',
+          );
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byType(PetAvatar));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('使用这张'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('头像还没上传完，请稍后重试'), findsOneWidget);
+      expect(tester.widget<PetAvatar>(find.byType(PetAvatar)).url, isNull);
+    });
+  });
+
+  group('列表展示', () {
+    testWidgets('列表卡展示真实头像；无头像回退占位', (tester) async {
+      pets.listPetsHandler = () async => [
+        buildPet('p-1', name: '豆豆', overrides: {'avatarUrl': signedAvatar}),
+        buildPet('p-2', name: '花花'),
+      ];
+      await tester.pumpWidget(
+        MaterialApp(
+          theme: buildAppTheme(),
+          home: Scaffold(body: PetsPage(controller: controller)),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      final avatars = tester
+          .widgetList<PetAvatar>(find.byType(PetAvatar))
+          .toList();
+      expect(avatars.length, 2);
+      expect(avatars[0].url, signedAvatar);
+      expect(avatars[1].url, isNull, reason: '无头像回退爪印占位（不显示破图）');
+    });
+  });
+}

test/features/pets/pet_detail_page_test.dart

@@ -188,12 +188,24 @@ void main() {
   });
 
   group('T2-13 · 数据卡行接 summary', () {
-    testWidgets('四卡取数：最新体重 / 疫苗进度 / 下一针 / 本月花费（tz 透传）', (tester) async {
+    testWidgets('四卡取数：最新体重 / 疫苗进度 / 下一针 / 当月花费（tz 透传）', (tester) async {
       repository.getPetHandler = (petId) async => buildPet('p-1');
       String? capturedTz;
+      // M3.5-03：花费卡标签展示服务端归月的实际月份，故样本月份取「本月」，
+      // 断言不随年份漂移（跨年格式另由 monthlyExpenseCardLabel 单测覆盖）。
+      final now = DateTime.now();
+      final thisMonth = '${now.year}-${now.month.toString().padLeft(2, '0')}';
       repository.getPetSummaryHandler = (petId, tz) async {
         capturedTz = tz;
-        return buildSummary();
+        return buildSummary(
+          overrides: {
+            'monthlyExpense': {
+              'month': thisMonth,
+              'timezone': 'Asia/Shanghai',
+              'amountCents': 12850,
+            },
+          },
+        );
       };
 
       await pumpDetail(tester);
@@ -208,12 +220,45 @@ void main() {
       expect(find.text('下一针·狂犬疫苗'), findsOneWidget);
       // T2-14：月度花费卡接 monthlyExpense（12850 分 → 元展示）。
       expect(find.text('¥128.50'), findsOneWidget);
-      expect(find.text('本月花费'), findsOneWidget);
+      // M3.5-03：不再硬编码「本月花费」，展示实际月份便于用户自查。
+      expect(find.text('${now.month} 月花费'), findsOneWidget);
+      expect(find.text('本月花费'), findsNothing);
       // T2-13 遗留③：tz 透传设备时区固定偏移（月度窗口随设备时区）。
       expect(capturedTz, tzOffsetQueryValue(DateTime.now().timeZoneOffset));
       expect(capturedTz, matches(RegExp(r'^[+-]\d{2}:\d{2}$')));
     });
 
+    testWidgets('M3.5-03 · 四张数据卡均有 chevron 可点提示', (tester) async {
+      repository.getPetHandler = (petId) async => buildPet('p-1');
+      final now = DateTime.now();
+      final thisMonth = '${now.year}-${now.month.toString().padLeft(2, '0')}';
+      repository.getPetSummaryHandler = (petId, tz) async => buildSummary(
+        overrides: {
+          'monthlyExpense': {
+            'month': thisMonth,
+            'timezone': 'Asia/Shanghai',
+            'amountCents': 0,
+          },
+        },
+      );
+
+      await pumpDetail(tester);
+      await tester.pumpAndSettle();
+
+      // 四张 stat 卡都挂了 onTap，此前无任何视觉提示；现统一补
+      // chevron_right（与宠物列表卡 / 健康提醒卡同款）。
+      for (final label in ['最新体重', '疫苗进度', '下一针·狂犬疫苗', '${now.month} 月花费']) {
+        expect(
+          find.ancestor(
+            of: find.text(label),
+            matching: find.widgetWithIcon(Card, Icons.chevron_right),
+          ),
+          findsOneWidget,
+          reason: '「$label」卡缺可点提示',
+        );
+      }
+    });
+
     testWidgets('null 语义：无登记显示空态而非 0/0', (tester) async {
       repository.getPetHandler = (petId) async => buildPet('p-1');
       repository.getPetSummaryHandler = (petId, tz) async => buildSummary(
@@ -302,12 +347,22 @@ void main() {
   });
 
   group('T2-14 · 时间线入口', () {
-    testWidgets('点本月花费卡 → 健康时间线页；返回后重拉摘要', (tester) async {
+    testWidgets('点当月花费卡 → 健康时间线页；返回后重拉摘要', (tester) async {
       repository.getPetHandler = (petId) async => buildPet('p-1');
       var summaryCalls = 0;
+      final now = DateTime.now();
+      final thisMonth = '${now.year}-${now.month.toString().padLeft(2, '0')}';
       repository.getPetSummaryHandler = (petId, tz) async {
         summaryCalls++;
-        return buildSummary();
+        return buildSummary(
+          overrides: {
+            'monthlyExpense': {
+              'month': thisMonth,
+              'timezone': 'Asia/Shanghai',
+              'amountCents': 12850,
+            },
+          },
+        );
       };
       repository.listHealthEventsHandler = (petId, limit, cursor) async =>
           const CursorPage(items: [], nextCursor: null, hasMore: false);
@@ -315,7 +370,7 @@ void main() {
       await pumpDetail(tester);
       await tester.pumpAndSettle();
 
-      await tester.tap(find.text('本月花费'));
+      await tester.tap(find.text('${now.month} 月花费'));
       await tester.pumpAndSettle();
 
       expect(find.byType(HealthEventsPage), findsOneWidget);

test/features/pets/vaccination_form_page_test.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
 import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
@@ -36,6 +37,11 @@ void main() {
     await tester.pumpWidget(
       MaterialApp(
         theme: buildAppTheme(),
+        // M3.5-01：与生产一致挂 zh-CN delegate，日期选择器等内置组件文案
+        // 才是用户真机看到的中文。
+        localizationsDelegates: appLocalizationsDelegates,
+        supportedLocales: appSupportedLocales,
+        locale: appLocale,
         home: const Scaffold(body: Text('列表基底')),
       ),
     );
@@ -65,7 +71,7 @@ void main() {
   Future<void> pickDate(WidgetTester tester, String tileLabel) async {
     await tester.tap(find.text(tileLabel));
     await tester.pumpAndSettle();
-    await tester.tap(find.text('OK'));
+    await tester.tap(find.text('确定'));
     await tester.pumpAndSettle();
   }
 

test/features/pets/vaccination_records_page_test.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/app/app_localization.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
 import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
 import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
@@ -39,6 +40,11 @@ void main() {
     await tester.pumpWidget(
       MaterialApp(
         theme: buildAppTheme(),
+        // M3.5-01：与生产一致挂 zh-CN delegate，日期选择器等内置组件文案
+        // 才是用户真机看到的中文。
+        localizationsDelegates: appLocalizationsDelegates,
+        supportedLocales: appSupportedLocales,
+        locale: appLocale,
         home: const Scaffold(body: Text('详情基底')),
       ),
     );
@@ -166,7 +172,7 @@ void main() {
     await tester.pumpAndSettle();
     await tester.tap(find.text('计划接种日期'));
     await tester.pumpAndSettle();
-    await tester.tap(find.text('OK'));
+    await tester.tap(find.text('确定'));
     await tester.pumpAndSettle();
     await tester.tap(find.text('保存登记'));
     await tester.pumpAndSettle();

test/features/post/post_detail_page_test.dart

@@ -0,0 +1,551 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/comment_tile.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
+import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
+import 'package:patbond_flutter/features/community/community_interaction_analytics.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/post/post_detail_page.dart';
+
+import '../../helpers/community_test_helpers.dart';
+
+void main() {
+  late FakeCommunityRepository repository;
+  late CommunityController controller;
+  late List<(String, Map<String, dynamic>?)> events;
+  late CommunityInteractionAnalytics analytics;
+
+  /// 无媒体帖（避免测试环境网络图噪音；媒体形态单测另立）。
+  Post textPost({
+    String id = 'p-1',
+    bool likedByMe = false,
+    int likeCount = 6,
+    int commentCount = 3,
+  }) => Post.fromJson({
+    ...samplePostJson(id: id, likedByMe: likedByMe, likeCount: likeCount),
+    'media': <Object>[],
+    'commentCount': commentCount,
+  });
+
+  setUp(() {
+    repository = FakeCommunityRepository();
+    events = [];
+    analytics = CommunityInteractionAnalytics(
+      (name, [props]) async => events.add((name, props)),
+    );
+    controller = CommunityController(
+      repository: repository,
+      interactionAnalytics: analytics,
+    );
+    // 缺省行为：正常帖 + 空评论 + 未关注（各测试按需覆盖）。
+    repository.onGetPost = (_) async => textPost();
+    repository.onListComments = (_, _) async => commentPage(const []);
+    repository.onGetFollowStats = (_) async => const FollowStats(
+      followerCount: 1,
+      followingCount: 2,
+      followedByMe: false,
+    );
+  });
+
+  List<Map<String, dynamic>?> eventsNamed(String name) =>
+      events.where((e) => e.$1 == name).map((e) => e.$2).toList();
+
+  Widget detailApp({String? currentUserId = 'me'}) => MaterialApp(
+    theme: buildAppTheme(),
+    home: PostDetailPage(
+      controller: controller,
+      postId: 'p-1',
+      currentUserId: currentUserId,
+      analytics: analytics,
+    ),
+  );
+
+  /// 经启动页 push 详情（40403 返回 Feed 的 pop 断言用）。
+  Widget launcherApp({String? currentUserId = 'me'}) => MaterialApp(
+    theme: buildAppTheme(),
+    home: Builder(
+      builder: (context) => Scaffold(
+        body: Center(
+          child: TextButton(
+            onPressed: () => Navigator.of(context).push(
+              MaterialPageRoute<void>(
+                builder: (_) => PostDetailPage(
+                  controller: controller,
+                  postId: 'p-1',
+                  currentUserId: currentUserId,
+                  analytics: analytics,
+                ),
+              ),
+            ),
+            child: const Text('打开详情'),
+          ),
+        ),
+      ),
+    ),
+  );
+
+  group('详情四态', () {
+    testWidgets('loading：请求未回渲染转圈', (tester) async {
+      final post = Completer<Post>();
+      repository.onGetPost = (_) => post.future;
+
+      await tester.pumpWidget(detailApp());
+      await tester.pump();
+      expect(find.byType(CircularProgressIndicator), findsOneWidget);
+
+      post.complete(textPost());
+      await tester.pumpAndSettle();
+      expect(find.text('晒了一下午太阳。'), findsOneWidget);
+    });
+
+    testWidgets('ready：正文/作者/求助标/评论标题齐全', (tester) async {
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      expect(find.text('今天的豆豆'), findsOneWidget);
+      expect(find.text('晒了一下午太阳。'), findsOneWidget);
+      expect(find.text('毛毛的铲屎官'), findsOneWidget);
+      expect(find.text('评论 (3)'), findsOneWidget);
+      expect(find.text('还没有评论，来抢沙发'), findsOneWidget);
+    });
+
+    testWidgets('error：横幅 + 重试恢复 ready', (tester) async {
+      var attempts = 0;
+      repository.onGetPost = (_) async {
+        attempts += 1;
+        if (attempts == 1) throw const ApiNetworkException();
+        return textPost();
+      };
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.byType(InlineErrorBanner), findsOneWidget);
+      expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);
+
+      await tester.tap(find.text('重试'));
+      await tester.pumpAndSettle();
+      expect(find.byType(InlineErrorBanner), findsNothing);
+      expect(find.text('晒了一下午太阳。'), findsOneWidget);
+    });
+
+    testWidgets('40403 不存在态：SnackBar + 返回 Feed 并触发刷新', (tester) async {
+      repository.onGetPost = (_) async =>
+          throw const PostNotFoundException(message: 'gone');
+      repository.onFeed = (_, _) async => feedPage(const []);
+
+      await tester.pumpWidget(launcherApp());
+      await tester.tap(find.text('打开详情'));
+      await tester.pumpAndSettle();
+
+      // 已弹回启动页 + 提示 + Feed 整体刷新（失效帖剔除）。
+      expect(find.text('打开详情'), findsOneWidget);
+      expect(find.text('帖子不存在或已被删除'), findsOneWidget);
+      expect(repository.calls, contains('feed:cursor=null'));
+    });
+
+    testWidgets('内存副本先渲染：进入即展示缓存，后台拉新不阻塞', (tester) async {
+      await controller.getPost('p-1'); // 预热详情副本。
+      final refresh = Completer<Post>();
+      repository.onGetPost = (_) => refresh.future;
+
+      await tester.pumpWidget(detailApp());
+      await tester.pump();
+      // 拉新未回已渲染缓存内容，无全页转圈。
+      expect(find.text('晒了一下午太阳。'), findsOneWidget);
+
+      refresh.complete(textPost(likeCount: 9));
+      await tester.pumpAndSettle();
+      expect(find.text('9'), findsOneWidget);
+    });
+  });
+
+  group('媒体', () {
+    testWidgets('多图渲染真九宫格，点格进全屏大图（页码 + 关闭）', (tester) async {
+      repository.onGetPost = (_) async => Post.fromJson({
+        ...samplePostJson(),
+        'media': [
+          for (var i = 0; i < 5; i++)
+            samplePostMediaItemJson(
+              assetId: 'a-$i',
+              position: i,
+              isCover: i == 0,
+            ),
+        ],
+      });
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.byType(PostMediaGrid), findsOneWidget);
+
+      await tester.tap(
+        find
+            .descendant(
+              of: find.byType(PostMediaGrid),
+              matching: find.byType(InkWell),
+            )
+            .first,
+      );
+      await tester.pumpAndSettle();
+      expect(find.text('1/5'), findsOneWidget);
+
+      await tester.tap(find.byIcon(Icons.close));
+      await tester.pumpAndSettle();
+      expect(find.byType(PostMediaGrid), findsOneWidget);
+    });
+  });
+
+  group('评论区', () {
+    testWidgets('游标列表：首页渲染 + 触底携游标补页', (tester) async {
+      repository.onListComments = (_, cursor) async {
+        if (cursor == null) {
+          return commentPage(
+            [
+              sampleComment(id: 'c-1', content: '第一条'),
+              sampleComment(id: 'c-2', content: '第二条'),
+            ],
+            nextCursor: 'cc1',
+            hasMore: true,
+          );
+        }
+        return commentPage([sampleComment(id: 'c-3', content: '第三条')]);
+      };
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.text('第一条'), findsOneWidget);
+
+      await tester.drag(find.byType(ListView), const Offset(0, -800));
+      await tester.pumpAndSettle();
+      expect(
+        repository.calls.where((c) => c.startsWith('comments:')).toList(),
+        ['comments:p-1:cursor=null', 'comments:p-1:cursor=cc1'],
+      );
+      expect(find.text('第三条'), findsOneWidget);
+    });
+
+    testWidgets('列表失败：话术 + 点按重试恢复', (tester) async {
+      var attempts = 0;
+      repository.onListComments = (_, _) async {
+        attempts += 1;
+        if (attempts == 1) throw const ApiNetworkException();
+        return commentPage([sampleComment(content: '恢复后的评论')]);
+      };
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.text('加载失败，点此重试'), findsOneWidget);
+
+      await tester.tap(find.text('加载失败，点此重试'));
+      await tester.pumpAndSettle();
+      expect(find.text('恢复后的评论'), findsOneWidget);
+    });
+
+    testWidgets('创建成功：插入列表头 + 计数 +1 + comment_create_succeeded + 清空输入', (
+      tester,
+    ) async {
+      repository.onCreateComment = (_, request) async =>
+          sampleComment(id: 'c-new', content: request.content);
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.enterText(find.byType(TextField), '沙发！');
+      await tester.pump();
+      await tester.tap(find.byIcon(Icons.send_rounded));
+      await tester.pumpAndSettle();
+
+      expect(repository.calls, contains('createComment:p-1:沙发！'));
+      expect(find.text('沙发！'), findsOneWidget); // 列表中的新评论。
+      expect(find.text('评论 (4)'), findsOneWidget);
+      expect(
+        tester.widget<TextField>(find.byType(TextField)).controller?.text,
+        '',
+      );
+      final succeeded = eventsNamed('comment_create_succeeded').single!;
+      expect(succeeded['isReply'], false);
+      expect(succeeded['textLengthBucket'], 'short');
+      expect(succeeded['durationMs'], greaterThanOrEqualTo(0));
+      // Feed 卡片同源计数（跨页一致的另一半在 like 测试）。
+      expect(controller.cachedPost('p-1')!.commentCount, 4);
+    });
+
+    testWidgets('创建失败：SnackBar + comment_create_failed，attemptSeq 递增', (
+      tester,
+    ) async {
+      repository.onCreateComment = (_, _) async =>
+          throw const ApiBusinessException(code: 40000, message: 'bad');
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.enterText(find.byType(TextField), '不合规内容');
+      await tester.pump();
+      await tester.tap(find.byIcon(Icons.send_rounded));
+      await tester.pumpAndSettle();
+      expect(find.text('评论内容不合规，请修改后重试'), findsOneWidget);
+
+      // 等 SnackBar 退场（遮挡底部发送钮）后重试第二次。
+      await tester.pump(const Duration(seconds: 5));
+      await tester.pumpAndSettle();
+      await tester.tap(find.byIcon(Icons.send_rounded));
+      await tester.pumpAndSettle();
+      expect(eventsNamed('comment_create_failed'), [
+        {
+          'failureReason': 'validation_error',
+          'attemptSeq': 1,
+          'errorCode': 40000,
+          'httpStatus': 400,
+        },
+        {
+          'failureReason': 'validation_error',
+          'attemptSeq': 2,
+          'errorCode': 40000,
+          'httpStatus': 400,
+        },
+      ]);
+      // 失败不清空输入、不入列表、不动计数。
+      expect(find.text('评论 (3)'), findsOneWidget);
+    });
+
+    testWidgets('删除权限呈现：仅本人评论有「删除」；确认后删除 + 计数 -1', (tester) async {
+      repository.onListComments = (_, _) async => commentPage([
+        sampleComment(
+          id: 'c-mine',
+          author: sampleAuthorJson(userId: 'me', nickname: '我自己'),
+          content: '我的评论',
+        ),
+        sampleComment(id: 'c-other', content: '别人的评论'),
+      ]);
+      repository.onDeleteComment = (_) async {};
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      await tester.drag(find.byType(ListView), const Offset(0, -400));
+      await tester.pump();
+
+      // 两条评论，删除入口恰一个（本人条目）。
+      expect(find.byType(CommentTile), findsNWidgets(2));
+      expect(find.text('删除'), findsOneWidget);
+
+      await tester.tap(find.text('删除'));
+      await tester.pumpAndSettle();
+      expect(find.text('删除这条评论？'), findsOneWidget);
+      await tester.tap(find.widgetWithText(FilledButton, '删除'));
+      await tester.pumpAndSettle();
+
+      expect(repository.calls, contains('deleteComment:c-mine'));
+      expect(find.text('我的评论'), findsNothing);
+      expect(find.text('别人的评论'), findsOneWidget);
+      expect(find.text('评论 (2)'), findsOneWidget);
+    });
+
+    testWidgets('删除失败：40301 提示无权限，条目保留', (tester) async {
+      repository.onListComments = (_, _) async => commentPage([
+        sampleComment(
+          id: 'c-mine',
+          author: sampleAuthorJson(userId: 'me', nickname: '我自己'),
+          content: '我的评论',
+        ),
+      ]);
+      repository.onDeleteComment = (_) async =>
+          throw const PostAccessDeniedException(message: 'denied');
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      await tester.drag(find.byType(ListView), const Offset(0, -400));
+      await tester.pump();
+
+      await tester.tap(find.text('删除'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.widgetWithText(FilledButton, '删除'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('没有权限删除这条评论'), findsOneWidget);
+      expect(find.text('我的评论'), findsOneWidget);
+      expect(find.text('评论 (3)'), findsOneWidget);
+    });
+  });
+
+  group('互动（ToggleSync UI 层）', () {
+    testWidgets('点赞乐观翻转即时 +1，成功报 post_liked(source=post_detail)', (
+      tester,
+    ) async {
+      final like = Completer<LikeState>();
+      repository.onLikeToggle = (_, _) => like.future;
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(Icons.favorite_border));
+      await tester.pump();
+      expect(find.text('7'), findsOneWidget);
+      expect(find.byIcon(Icons.favorite), findsOneWidget);
+
+      like.complete(const LikeState(liked: true, likeCount: 7));
+      await tester.pumpAndSettle();
+      expect(eventsNamed('post_liked'), [
+        {'source': 'post_detail'},
+      ]);
+    });
+
+    testWidgets('点赞失败：零动画回滚成对恢复 + SnackBar，不报事件', (tester) async {
+      final like = Completer<LikeState>();
+      repository.onLikeToggle = (_, _) => like.future;
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(Icons.favorite_border));
+      await tester.pump();
+      expect(find.text('7'), findsOneWidget);
+
+      like.completeError(const ApiNetworkException());
+      await tester.pumpAndSettle();
+      expect(find.text('6'), findsOneWidget);
+      expect(find.byIcon(Icons.favorite_border), findsOneWidget);
+      expect(find.text('操作失败，请重试'), findsOneWidget);
+      expect(eventsNamed('post_liked'), isEmpty);
+    });
+
+    testWidgets('收藏接线：成功报 post_favorited(source=post_detail)', (tester) async {
+      repository.onBookmarkToggle = (_, target) async =>
+          BookmarkState(bookmarked: target, bookmarkCount: target ? 3 : 2);
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(Icons.bookmark_border));
+      await tester.pumpAndSettle();
+      expect(find.byIcon(Icons.bookmark), findsOneWidget);
+      expect(eventsNamed('post_favorited'), [
+        {'source': 'post_detail'},
+      ]);
+    });
+
+    testWidgets('跨页一致：详情页点赞，Feed 卡片同帖同帧更新（共享同一实例）', (tester) async {
+      repository.onFeed = (_, _) async =>
+          feedPage([sampleFeedCard(likeCount: 6)]);
+      await controller.refresh();
+      repository.onLikeToggle = (_, target) async =>
+          LikeState(liked: target, likeCount: target ? 7 : 6);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          theme: buildAppTheme(),
+          home: Column(
+            children: [
+              // 模拟 Feed 侧对同一 controller 的消费。
+              ListenableBuilder(
+                listenable: controller,
+                builder: (context, _) {
+                  final card = controller.feed.single;
+                  return Text('card:${card.likedByMe}:${card.likeCount}');
+                },
+              ),
+              Expanded(
+                child: PostDetailPage(
+                  controller: controller,
+                  postId: 'p-1',
+                  currentUserId: 'me',
+                  analytics: analytics,
+                ),
+              ),
+            ],
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(find.text('card:false:6'), findsOneWidget);
+
+      await tester.tap(find.byIcon(Icons.favorite_border));
+      await tester.pump();
+      // 乐观写入即同源：卡片副本同帧翻转。
+      expect(find.text('card:true:7'), findsOneWidget);
+      await tester.pumpAndSettle();
+      expect(find.text('card:true:7'), findsOneWidget);
+    });
+  });
+
+  group('关注', () {
+    testWidgets('未关注 → 关注：乐观翻转 + user_followed(post_detail)', (tester) async {
+      repository.onFollowToggle = (_, target) async =>
+          FollowState(following: target, followerCount: target ? 2 : 1);
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.text('＋ 关注'), findsOneWidget);
+
+      await tester.tap(find.text('＋ 关注'));
+      await tester.pump();
+      expect(find.text('已关注'), findsOneWidget);
+
+      await tester.pumpAndSettle();
+      expect(repository.calls, contains('follow:u-1'));
+      expect(eventsNamed('user_followed'), [
+        {'source': 'post_detail'},
+      ]);
+    });
+
+    testWidgets('已关注 → 取关：确认弹窗 + user_unfollowed', (tester) async {
+      repository.onGetFollowStats = (_) async => const FollowStats(
+        followerCount: 2,
+        followingCount: 2,
+        followedByMe: true,
+      );
+      repository.onFollowToggle = (_, target) async =>
+          FollowState(following: target, followerCount: target ? 2 : 1);
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+      expect(find.text('已关注'), findsOneWidget);
+
+      await tester.tap(find.text('已关注'));
+      await tester.pumpAndSettle();
+      expect(find.text('不再关注 TA？'), findsOneWidget);
+      await tester.tap(find.widgetWithText(FilledButton, '不再关注'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('＋ 关注'), findsOneWidget);
+      expect(repository.calls, contains('unfollow:u-1'));
+      expect(eventsNamed('user_unfollowed'), [
+        {'source': 'post_detail'},
+      ]);
+    });
+
+    testWidgets('关注失败：回滚直接跳变 + SnackBar', (tester) async {
+      final follow = Completer<FollowState>();
+      repository.onFollowToggle = (_, _) => follow.future;
+
+      await tester.pumpWidget(detailApp());
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.text('＋ 关注'));
+      await tester.pump();
+      expect(find.text('已关注'), findsOneWidget);
+
+      follow.completeError(const ApiNetworkException());
+      await tester.pumpAndSettle();
+      expect(find.text('＋ 关注'), findsOneWidget);
+      expect(find.text('操作失败，请重试'), findsOneWidget);
+      expect(eventsNamed('user_followed'), isEmpty);
+    });
+
+    testWidgets('本人帖：不渲染关注钮、不拉 follow-stats', (tester) async {
+      await tester.pumpWidget(detailApp(currentUserId: 'u-1'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('＋ 关注'), findsNothing);
+      expect(find.text('已关注'), findsNothing);
+      expect(
+        repository.calls.where((c) => c.startsWith('followStats:')),
+        isEmpty,
+      );
+    });
+  });
+}

test/features/profile/profile_controller_test.dart

@@ -0,0 +1,200 @@
+import 'dart:async';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+import '../../helpers/community_test_helpers.dart';
+
+void main() {
+  late FakeCommunityRepository community;
+
+  setUp(() {
+    community = FakeCommunityRepository();
+  });
+
+  ProfileController build(FakeAuthRepository auth) =>
+      ProfileController(authRepository: auth, communityRepository: community);
+
+  test('四态：initial → loading → ready（资料 + 两块统计齐备）', () async {
+    final gate = Completer<UserProfile>();
+    final controller = build(FakeAuthRepository(meHandler: () => gate.future));
+    community.onGetMyCommunityStats = () async =>
+        CommunityStats.fromJson(sampleCommunityStatsJson());
+    community.onGetFollowStats = (_) async =>
+        FollowStats.fromJson(sampleFollowStatsJson());
+
+    expect(controller.phase, ProfileLoadPhase.initial);
+    final pending = controller.refresh();
+    expect(controller.phase, ProfileLoadPhase.loading);
+
+    gate.complete(buildProfile(nickname: '小柴'));
+    await pending;
+
+    expect(controller.phase, ProfileLoadPhase.ready);
+    expect(controller.statsPhase, ProfileStatsPhase.ready);
+    expect(controller.displayName, '小柴');
+    expect(controller.communityStats!.receivedLikeCount, 128);
+    expect(controller.followStats!.followerCount, 24);
+  });
+
+  test('/me 失败且无副本 → error 态 + 可重试；不外抛', () async {
+    var attempts = 0;
+    final auth = FakeAuthRepository(
+      meHandler: () async {
+        attempts += 1;
+        if (attempts == 1) throw const ApiNetworkException('断网');
+        return buildProfile(nickname: '小柴');
+      },
+    );
+    final controller = build(auth);
+
+    await controller.refresh();
+    expect(controller.phase, ProfileLoadPhase.error);
+    expect(controller.lastError, isA<ApiNetworkException>());
+    expect(controller.profile, isNull);
+
+    await controller.refresh();
+    expect(controller.phase, ProfileLoadPhase.ready);
+    expect(controller.displayName, '小柴');
+  });
+
+  test('已有副本时刷新失败保留副本（不打断阅读，停在 ready）', () async {
+    var attempts = 0;
+    final controller = build(
+      FakeAuthRepository(
+        meHandler: () async {
+          attempts += 1;
+          if (attempts == 1) return buildProfile(nickname: '小柴');
+          throw const ApiNetworkException('断网');
+        },
+      ),
+    );
+
+    await controller.refresh();
+    await controller.refresh();
+
+    expect(controller.phase, ProfileLoadPhase.ready);
+    expect(controller.displayName, '小柴');
+    expect(controller.lastError, isA<ApiNetworkException>());
+  });
+
+  test('统计失败只降级统计块，资料仍 ready；refreshStats 可单独重试', () async {
+    var statsAttempts = 0;
+    community.onGetMyCommunityStats = () async {
+      statsAttempts += 1;
+      if (statsAttempts == 1) throw const ApiNetworkException('断网');
+      return CommunityStats.fromJson(sampleCommunityStatsJson());
+    };
+    community.onGetFollowStats = (_) async =>
+        FollowStats.fromJson(sampleFollowStatsJson());
+    final controller = build(FakeAuthRepository());
+
+    await controller.refresh();
+    expect(controller.phase, ProfileLoadPhase.ready);
+    expect(controller.statsPhase, ProfileStatsPhase.error);
+    expect(controller.communityStats, isNull);
+
+    await controller.refreshStats();
+    expect(controller.statsPhase, ProfileStatsPhase.ready);
+    expect(controller.phase, ProfileLoadPhase.ready);
+  });
+
+  test('空数据：两个数字为 0（不是 null、不是 404）', () async {
+    community.onGetMyCommunityStats = () async => CommunityStats.fromJson(
+      sampleCommunityStatsJson(receivedLikeCount: 0, publishedPostCount: 0),
+    );
+    community.onGetFollowStats = (_) async => FollowStats.fromJson(
+      sampleFollowStatsJson(followerCount: 0, followingCount: 0),
+    );
+    final controller = build(FakeAuthRepository());
+
+    await controller.refresh();
+
+    expect(controller.communityStats!.receivedLikeCount, 0);
+    expect(controller.communityStats!.publishedPostCount, 0);
+  });
+
+  test('save：空 patch 直接短路，不发请求（服务端对空 patch 答 400）', () async {
+    final auth = FakeAuthRepository(
+      updateMeHandler: (_) async => buildProfile(nickname: '不该被调用'),
+    );
+    final controller = build(auth);
+    await controller.refresh();
+
+    await controller.save(const UpdateMeRequest());
+
+    expect(auth.updateMePayloads, isEmpty);
+  });
+
+  test('save 成功即以服务端回显替换副本（含 avatarUrl 现签值）', () async {
+    final auth = FakeAuthRepository(
+      updateMeHandler: (_) async => buildProfile(
+        nickname: '小柴',
+        avatarUrl: 'https://m/a.jpg?X-Amz-Signature=new',
+      ),
+    );
+    final controller = build(auth);
+    await controller.refresh();
+    expect(controller.displayName, 'llx');
+
+    await controller.save(
+      const UpdateMeRequest(nickname: PatchField<String>.value('小柴')),
+    );
+
+    expect(controller.displayName, '小柴');
+    expect(controller.profile!.avatarUrl, contains('X-Amz-Signature=new'));
+    expect(auth.updateMePayloads.single, {'nickname': '小柴'});
+  });
+
+  test('save 失败按类型化异常外抛（供编辑页分层呈现），副本不动', () async {
+    final auth = FakeAuthRepository(
+      updateMeHandler: (_) async => throw const ApiBusinessException(
+        code: ApiCodes.mediaNotReady,
+        message: 'not ready',
+      ),
+    );
+    final controller = build(auth);
+    await controller.refresh();
+
+    await expectLater(
+      controller.save(
+        const UpdateMeRequest(avatarAssetId: PatchField<String>.value('a-1')),
+      ),
+      throwsA(
+        isA<ApiBusinessException>().having(
+          (e) => e.code,
+          'code',
+          ApiCodes.mediaNotReady,
+        ),
+      ),
+    );
+    expect(controller.displayName, 'llx');
+  });
+
+  test('reset：登出清空资料与统计，回 initial（跨账号不泄漏）', () async {
+    final controller = build(FakeAuthRepository());
+    await controller.refresh();
+    expect(controller.profile, isNotNull);
+
+    controller.reset();
+
+    expect(controller.phase, ProfileLoadPhase.initial);
+    expect(controller.profile, isNull);
+    expect(controller.displayName, isNull);
+    expect(controller.communityStats, isNull);
+    expect(controller.followStats, isNull);
+  });
+
+  test('follow-stats 用的是本人 userId（路径主体正确）', () async {
+    final controller = build(
+      FakeAuthRepository(meHandler: () async => buildProfile(userId: 'u-42')),
+    );
+    await controller.refresh();
+    expect(community.calls, contains('followStats:u-42'));
+    expect(community.calls, contains('communityStats'));
+  });
+}

test/features/profile/profile_edit_page_test.dart

@@ -0,0 +1,295 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/media_uploader.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+import 'package:patbond_flutter/features/profile/profile_edit_page.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+import '../../helpers/community_test_helpers.dart';
+import '../../helpers/media_test_helpers.dart';
+
+/// T3.5-08 编辑页：**PATCH 三态载荷**是本文件的重点。
+///
+/// 每个成功用例都断言一次「未改字段的键不出现在 JSON 里」——这是三态与
+/// 两态的唯一可观测差别，也是「只改昵称却把头像清掉」这类事故的唯一防线。
+
+/// 昵称输入框（AppTextField 内层 TextFormField）。
+Finder get nicknameField => find.byType(TextFormField);
+
+void main() {
+  late FakeCommunityRepository community;
+  late FakeMediaImagePicker picker;
+  late FakeMediaCompressor compressor;
+  late FakeDirectUploadClient direct;
+
+  setUp(() {
+    community = FakeCommunityRepository();
+    community.onGetMyCommunityStats = () async =>
+        CommunityStats.fromJson(sampleCommunityStatsJson());
+    community.onGetFollowStats = (_) async =>
+        FollowStats.fromJson(sampleFollowStatsJson());
+    picker = FakeMediaImagePicker([decodablePickedImage()]);
+    compressor = FakeMediaCompressor();
+    direct = FakeDirectUploadClient();
+    community.onCreateMediaUpload = (_) async => credentials();
+    community.onCompleteMediaUpload = (assetId) async =>
+        readyAsset(assetId: assetId);
+  });
+
+  MediaUploader buildUploader(MediaPurpose purpose) => MediaUploader(
+    repository: community,
+    purpose: purpose,
+    picker: picker,
+    compressor: compressor,
+    directUpload: direct,
+    maxImages: 1,
+    maxConcurrentUploads: 1,
+  );
+
+  /// 直接 push 编辑页（资料页链路另有测试；这里只测编辑页本身）。
+  Future<FakeAuthRepository> pumpEdit(
+    WidgetTester tester, {
+    String? nickname,
+    String? avatarUrl,
+    bool withUploader = true,
+    ApiException? saveError,
+  }) async {
+    tester.view.physicalSize = const Size(700, 1800);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.reset);
+    final auth = FakeAuthRepository(
+      meHandler: () async => buildProfile(
+        username: 'llx',
+        nickname: nickname,
+        avatarUrl: avatarUrl,
+      ),
+      updateMeHandler: (_) async {
+        if (saveError != null) throw saveError;
+        return buildProfile(username: 'llx', nickname: nickname);
+      },
+    );
+    final controller = ProfileController(
+      authRepository: auth,
+      communityRepository: community,
+    );
+    addTearDown(controller.dispose);
+    await controller.refresh();
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: ProfileEditPage(
+          controller: controller,
+          avatarUploaderBuilder: withUploader ? buildUploader : null,
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+    return auth;
+  }
+
+  group('三态载荷', () {
+    testWidgets('只改昵称 → 载荷只有 nickname，avatarAssetId 键不出现', (tester) async {
+      final auth = await pumpEdit(
+        tester,
+        avatarUrl: 'https://m/a.jpg?X-Amz-Signature=s',
+      );
+
+      await tester.enterText(nicknameField, '小柴');
+      await tester.pump();
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      final payload = auth.updateMePayloads.single;
+      expect(payload, {'nickname': '小柴'});
+      expect(
+        payload.containsKey('avatarAssetId'),
+        isFalse,
+        reason: '发成 avatarAssetId: null 会把用户已有头像一起清掉',
+      );
+    });
+
+    testWidgets('点「清除昵称」 → nickname 显式 null，头像键不出现', (tester) async {
+      final auth = await pumpEdit(
+        tester,
+        nickname: '小柴',
+        avatarUrl: 'https://m/a.jpg?X-Amz-Signature=s',
+      );
+
+      await tester.tap(find.text('清除昵称'));
+      await tester.pumpAndSettle();
+      expect(find.text('保存后将清除昵称，展示名回退为用户名'), findsOneWidget);
+
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      final payload = auth.updateMePayloads.single;
+      expect(payload.containsKey('nickname'), isTrue);
+      expect(payload['nickname'], isNull);
+      expect(payload.containsKey('avatarAssetId'), isFalse);
+    });
+
+    testWidgets('点「清除头像」 → avatarAssetId 显式 null，nickname 键不出现', (
+      tester,
+    ) async {
+      final auth = await pumpEdit(
+        tester,
+        nickname: '小柴',
+        avatarUrl: 'https://m/a.jpg?X-Amz-Signature=s',
+      );
+
+      await tester.tap(find.text('清除头像'));
+      await tester.pumpAndSettle();
+      expect(find.text('保存后将移除头像'), findsOneWidget);
+
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      final payload = auth.updateMePayloads.single;
+      expect(payload.containsKey('avatarAssetId'), isTrue);
+      expect(payload['avatarAssetId'], isNull);
+      expect(
+        payload.containsKey('nickname'),
+        isFalse,
+        reason: '昵称没碰过就不该出现在载荷里（更不该是 null）',
+      );
+    });
+
+    testWidgets('输入与原昵称相同 → 视为未改，保存钮禁用、不发请求', (tester) async {
+      final auth = await pumpEdit(tester, nickname: '小柴');
+
+      // 预填即原值。
+      expect(find.text('小柴'), findsOneWidget);
+      final button = tester.widget<FilledButton>(
+        find.widgetWithText(FilledButton, '保存'),
+      );
+      expect(button.onPressed, isNull);
+      expect(auth.updateMePayloads, isEmpty);
+    });
+
+    testWidgets('无昵称时预填空串（不预填 username，避免把回退固化成真昵称）', (tester) async {
+      await pumpEdit(tester);
+
+      final field = tester.widget<TextFormField>(nicknameField);
+      expect(field.controller!.text, '');
+      expect(find.text('未设置，当前展示为用户名「llx」'), findsOneWidget);
+      // 无昵称时不给「清除昵称」入口（清一个不存在的东西无意义）。
+      expect(find.text('清除昵称'), findsNothing);
+    });
+  });
+
+  group('校验与失败语义', () {
+    testWidgets('33 码点昵称：字段级 errorText，不发请求', (tester) async {
+      final auth = await pumpEdit(tester);
+
+      await tester.enterText(nicknameField, '柴' * 33);
+      await tester.pump();
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('昵称最多 32 个字'), findsOneWidget);
+      expect(auth.updateMePayloads, isEmpty);
+    });
+
+    testWidgets('纯空格昵称：不是隐式清空，提示走显式清除入口', (tester) async {
+      final auth = await pumpEdit(tester, nickname: '小柴');
+
+      await tester.enterText(nicknameField, '   ');
+      await tester.pump();
+      // 空白输入被判为「不改」，保存钮禁用（不会误发清空）。
+      final button = tester.widget<FilledButton>(
+        find.widgetWithText(FilledButton, '保存'),
+      );
+      expect(button.onPressed, isNull);
+      expect(auth.updateMePayloads, isEmpty);
+    });
+
+    testWidgets('42203 头像未就绪 → 横幅提示，页面留在编辑态可重试', (tester) async {
+      await pumpEdit(
+        tester,
+        saveError: const ApiBusinessException(
+          code: ApiCodes.mediaNotReady,
+          message: 'asset uploading',
+        ),
+      );
+
+      await tester.enterText(nicknameField, '小柴');
+      await tester.pump();
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      expect(find.byType(InlineErrorBanner), findsOneWidget);
+      expect(find.text('头像还没上传完，请稍后重试'), findsOneWidget);
+      expect(find.byType(ProfileEditPage), findsOneWidget);
+    });
+
+    testWidgets('40405 头像 asset 失效 → 提示重新上传', (tester) async {
+      await pumpEdit(
+        tester,
+        saveError: const ApiBusinessException(
+          code: ApiCodes.mediaNotFound,
+          message: 'gone',
+        ),
+      );
+
+      await tester.enterText(nicknameField, '小柴');
+      await tester.pump();
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('头像已失效，请重新上传'), findsOneWidget);
+    });
+  });
+
+  group('头像上传接线', () {
+    testWidgets('上传全链路：purpose=user_avatar，ready 后确认 → 载荷带新 assetId', (
+      tester,
+    ) async {
+      final auth = await pumpEdit(tester);
+
+      await tester.tap(find.text('更换头像'));
+      await tester.pumpAndSettle();
+
+      // 上传成功后 sheet 给预览 + 「使用这张」。
+      expect(find.text('使用这张'), findsOneWidget);
+      await tester.tap(find.text('使用这张'));
+      await tester.pumpAndSettle();
+
+      // 用途即引用侧的类型检查：必须是 user_avatar。
+      final request = community.lastMediaUploadRequest!;
+      expect(request.purpose, MediaPurpose.userAvatar);
+      expect(request.purpose.wire, 'user_avatar');
+
+      expect(find.text('已选择\n新头像'), findsOneWidget);
+
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      final payload = auth.updateMePayloads.single;
+      expect(payload, {'avatarAssetId': 'a-1'});
+      expect(payload.containsKey('nickname'), isFalse);
+    });
+
+    testWidgets('上传后再改昵称 → 两键齐出（一次 PATCH 改两样）', (tester) async {
+      final auth = await pumpEdit(tester);
+
+      await tester.tap(find.text('更换头像'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('使用这张'));
+      await tester.pumpAndSettle();
+
+      await tester.enterText(nicknameField, '小柴');
+      await tester.pump();
+      await tester.tap(find.text('保存'));
+      await tester.pumpAndSettle();
+
+      expect(auth.updateMePayloads.single, {
+        'nickname': '小柴',
+        'avatarAssetId': 'a-1',
+      });
+    });
+  });
+}

test/features/profile/profile_models_test.dart

@@ -0,0 +1,153 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/profile/profile_display.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+
+void main() {
+  group('展示名回退 nickname ?? username', () {
+    test('有昵称：展示昵称，nickname 字段保留 DB 原值', () {
+      final profile = buildProfile(username: 'llx', nickname: '小柴');
+      expect(profile.displayName, '小柴');
+      expect(profile.nickname, '小柴');
+    });
+
+    test('无昵称：展示 username，但 nickname 仍为 null（不被回退值污染）', () {
+      final profile = buildProfile(username: 'llx');
+      expect(profile.displayName, 'llx');
+      expect(
+        profile.nickname,
+        isNull,
+        reason: '回退只在展示层发生；nickname 必须保持 null，否则编辑页预填后会被固化成真昵称',
+      );
+    });
+
+    test('hasAvatar 只看 avatarUrl（响应不外露 avatarAssetId）', () {
+      expect(buildProfile().hasAvatar, isFalse);
+      expect(
+        buildProfile(avatarUrl: 'https://m/a.jpg?X-Amz-Signature=s').hasAvatar,
+        isTrue,
+      );
+    });
+  });
+
+  group('UpdateMeRequest 三态载荷', () {
+    test('什么都没碰 → isEmpty 且 JSON 为空对象', () {
+      const request = UpdateMeRequest();
+      expect(request.isEmpty, isTrue);
+      expect(request.toJson(), isEmpty);
+    });
+
+    test('只改昵称：avatarAssetId 键**不出现**（不改，而不是清空）', () {
+      const request = UpdateMeRequest(nickname: PatchField<String>.value('小柴'));
+      final json = request.toJson();
+      expect(json, {'nickname': '小柴'});
+      expect(
+        json.containsKey('avatarAssetId'),
+        isFalse,
+        reason: '发成 avatarAssetId: null 会把用户头像一起清掉',
+      );
+    });
+
+    test('只清昵称：nickname 显式 null，头像键仍不出现', () {
+      const request = UpdateMeRequest(nickname: PatchField<String>.clear());
+      final json = request.toJson();
+      expect(json.containsKey('nickname'), isTrue);
+      expect(json['nickname'], isNull);
+      expect(json.containsKey('avatarAssetId'), isFalse);
+    });
+
+    test('一次改两样：两键齐出', () {
+      const request = UpdateMeRequest(
+        nickname: PatchField<String>.value('小柴'),
+        avatarAssetId: PatchField<String>.value('asset-9'),
+      );
+      expect(request.toJson(), {'nickname': '小柴', 'avatarAssetId': 'asset-9'});
+      expect(request.isEmpty, isFalse);
+    });
+
+    test('只清头像：nickname 键不出现', () {
+      const request = UpdateMeRequest(
+        avatarAssetId: PatchField<String>.clear(),
+      );
+      final json = request.toJson();
+      expect(json.containsKey('nickname'), isFalse);
+      expect(json['avatarAssetId'], isNull);
+    });
+  });
+
+  group('昵称校验与 ck_users_nickname 对齐', () {
+    test('1 码点通过；32 CJK 通过；33 拒', () {
+      expect(validateNickname('柴'), isNull);
+      expect(validateNickname('柴' * 32), isNull);
+      expect(validateNickname('柴' * 33), isNotNull);
+    });
+
+    test('32 个 emoji（UTF-16 长度 64）通过——长度按码点计而非 String.length', () {
+      const emoji = '🐕';
+      final name = emoji * 32;
+      expect(name.length, 64, reason: '前提：UTF-16 长度确为 64');
+      expect(
+        validateNickname(name),
+        isNull,
+        reason: '按 String.length 校验会误拒数据库能存的 32 emoji 昵称',
+      );
+      expect(validateNickname(emoji * 33), isNotNull);
+    });
+
+    test('btrim 对齐：前后空格不计入长度', () {
+      expect(validateNickname('  豆豆  '), isNull);
+      expect(validateNickname('  ${'柴' * 32}  '), isNull);
+    });
+
+    test('纯空白不是隐式清空，而是校验失败并指向显式清除入口', () {
+      final message = validateNickname('   ');
+      expect(message, isNotNull);
+      expect(message, contains('清除昵称'));
+    });
+  });
+
+  group('错误文案分层', () {
+    test('保存失败按 PATCH /me 错误谱分层', () {
+      expect(
+        profileSaveErrorMessage(
+          const ApiBusinessException(code: ApiCodes.paramError, message: 'x'),
+        ),
+        '填写内容不符合要求，请检查后重试',
+      );
+      expect(
+        profileSaveErrorMessage(
+          const ApiBusinessException(
+            code: ApiCodes.mediaNotFound,
+            message: 'x',
+          ),
+        ),
+        '头像已失效，请重新上传',
+      );
+      expect(
+        profileSaveErrorMessage(
+          const ApiBusinessException(
+            code: ApiCodes.mediaNotReady,
+            message: 'x',
+          ),
+        ),
+        '头像还没上传完，请稍后重试',
+      );
+      expect(
+        profileSaveErrorMessage(const ApiNetworkException()),
+        '网络异常，请检查网络后重试',
+      );
+    });
+
+    test('加载失败文案不透出服务端 message', () {
+      expect(
+        profileLoadErrorMessage(
+          const ApiNetworkException('Connection refused'),
+        ),
+        '网络异常，请检查网络后重试',
+      );
+      expect(profileLoadErrorMessage(null), '加载失败，请稍后重试');
+    });
+  });
+}

test/features/profile/profile_page_test.dart

@@ -0,0 +1,207 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/theme/app_theme.dart';
+import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/profile/profile_controller.dart';
+import 'package:patbond_flutter/features/profile/profile_edit_page.dart';
+import 'package:patbond_flutter/features/profile/profile_page.dart';
+import 'package:patbond_flutter/state/app_state.dart';
+
+import '../../helpers/auth_test_helpers.dart';
+import '../../helpers/community_test_helpers.dart';
+
+void main() {
+  late FakeCommunityRepository community;
+
+  setUp(() {
+    community = FakeCommunityRepository();
+    community.onGetMyCommunityStats = () async =>
+        CommunityStats.fromJson(sampleCommunityStatsJson());
+    community.onGetFollowStats = (_) async =>
+        FollowStats.fromJson(sampleFollowStatsJson());
+  });
+
+  Future<ProfileController> pumpProfile(
+    WidgetTester tester, {
+    required FakeAuthRepository auth,
+  }) async {
+    // 资料页头部 + 五行菜单 + 两个底部按钮，加高视口保证全在栏内。
+    tester.view.physicalSize = const Size(700, 2400);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.reset);
+    final controller = ProfileController(
+      authRepository: auth,
+      communityRepository: community,
+    );
+    addTearDown(controller.dispose);
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: Scaffold(
+          body: ProfilePage(appState: AppState(), controller: controller),
+        ),
+      ),
+    );
+    return controller;
+  }
+
+  testWidgets('loading 态：居中转圈，无 demo 文案', (tester) async {
+    final gate = Completer<UserProfile>();
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(meHandler: () => gate.future),
+    );
+    // 预取推到帧末，故先走一帧再断言。
+    await tester.pump();
+
+    expect(find.byType(CircularProgressIndicator), findsOneWidget);
+    expect(find.text('萌宠新手（豆豆家长）'), findsNothing);
+    expect(find.text('Patbond 社区创作达人'), findsNothing);
+
+    gate.complete(buildProfile());
+    await tester.pumpAndSettle();
+  });
+
+  testWidgets('ready + 有昵称：展示昵称与 @username，四个数字来自服务端', (tester) async {
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => buildProfile(username: 'llx', nickname: '小柴'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('小柴'), findsOneWidget);
+    expect(find.text('@llx'), findsOneWidget);
+    // 24 关注我 / 7 我关注 / 128 获赞 / 12 作品（helpers 样本）。
+    expect(find.text('24'), findsOneWidget);
+    expect(find.text('7'), findsOneWidget);
+    expect(find.text('128'), findsOneWidget);
+    expect(find.text('12'), findsOneWidget);
+    expect(find.text('获赞'), findsOneWidget);
+    expect(find.text('我的作品'), findsOneWidget);
+    // demo 硬编码彻底退役。
+    expect(find.text('1.8k'), findsNothing);
+    expect(find.text('萌宠新手（豆豆家长）'), findsNothing);
+  });
+
+  testWidgets('ready + 无昵称：展示名回退 username（回退在客户端展示层）', (tester) async {
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => buildProfile(username: 'llx'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    // 展示名与 @username 两处都是 llx。
+    expect(find.text('llx'), findsOneWidget);
+    expect(find.text('@llx'), findsOneWidget);
+  });
+
+  testWidgets('空数据：四个数字全 0（不是空白、不是错误态）', (tester) async {
+    community.onGetMyCommunityStats = () async => CommunityStats.fromJson(
+      sampleCommunityStatsJson(receivedLikeCount: 0, publishedPostCount: 0),
+    );
+    community.onGetFollowStats = (_) async => FollowStats.fromJson(
+      sampleFollowStatsJson(followerCount: 0, followingCount: 0),
+    );
+    await pumpProfile(tester, auth: FakeAuthRepository());
+    await tester.pumpAndSettle();
+
+    expect(find.text('0'), findsNWidgets(4));
+    expect(find.text('统计加载失败'), findsNothing);
+  });
+
+  testWidgets('error 态：横幅 + 重试；重试成功进 ready', (tester) async {
+    var attempts = 0;
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async {
+          attempts += 1;
+          if (attempts == 1) throw const ApiNetworkException('断网');
+          return buildProfile(nickname: '小柴');
+        },
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.byType(InlineErrorBanner), findsOneWidget);
+    expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);
+
+    await tester.tap(find.text('重试'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('小柴'), findsOneWidget);
+    expect(find.byType(InlineErrorBanner), findsNothing);
+  });
+
+  testWidgets('统计块独立降级：资料照常显示，统计给「加载失败 + 重试」', (tester) async {
+    var statsAttempts = 0;
+    community.onGetMyCommunityStats = () async {
+      statsAttempts += 1;
+      if (statsAttempts == 1) throw const ApiNetworkException('断网');
+      return CommunityStats.fromJson(sampleCommunityStatsJson());
+    };
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(
+        meHandler: () async => buildProfile(nickname: '小柴'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('小柴'), findsOneWidget, reason: '统计失败不该拖垮整页');
+    expect(find.text('统计加载失败'), findsOneWidget);
+
+    await tester.tap(find.text('重试'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('128'), findsOneWidget);
+    expect(find.text('统计加载失败'), findsNothing);
+  });
+
+  testWidgets('点「编辑资料」进编辑页；保存成功回资料页并提示', (tester) async {
+    final auth = FakeAuthRepository(
+      meHandler: () async => buildProfile(username: 'llx'),
+      updateMeHandler: (_) async =>
+          buildProfile(username: 'llx', nickname: '小柴'),
+    );
+    await pumpProfile(tester, auth: auth);
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('编辑资料'));
+    await tester.pumpAndSettle();
+    expect(find.byType(ProfileEditPage), findsOneWidget);
+
+    await tester.enterText(find.byType(TextFormField), '小柴');
+    await tester.pump();
+    await tester.tap(find.text('保存'));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(ProfileEditPage), findsNothing);
+    expect(find.text('资料已更新'), findsOneWidget);
+    // 头部随之更新为新昵称。
+    expect(find.text('小柴'), findsOneWidget);
+  });
+
+  testWidgets('未装配上传能力时编辑页不渲染头像入口', (tester) async {
+    await pumpProfile(
+      tester,
+      auth: FakeAuthRepository(meHandler: () async => buildProfile()),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('编辑资料'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('更换头像'), findsNothing);
+    expect(find.byType(TextFormField), findsOneWidget, reason: '昵称输入仍在');
+  });
+}

test/helpers/auth_test_helpers.dart

@@ -26,15 +26,23 @@ class FakeAuthRepository implements AuthRepository {
     this.loginHandler,
     this.registerHandler,
     this.restoreHandler,
+    this.meHandler,
+    this.updateMeHandler,
   });
 
   final Future<void> Function()? loginHandler;
   final Future<void> Function()? registerHandler;
   final Future<SessionRestoreResult> Function()? restoreHandler;
+  final Future<UserProfile> Function()? meHandler;
+  final Future<UserProfile> Function(UpdateMeRequest)? updateMeHandler;
 
   int loginCalls = 0;
   int registerCalls = 0;
   int logoutCalls = 0;
+  int meCalls = 0;
+
+  /// 收到的 PATCH 载荷（三态断言用：**未改字段不应出现在 map 里**）。
+  final List<Map<String, Object?>> updateMePayloads = [];
 
   @override
   Future<void> login({required String username, required String password}) {
@@ -64,9 +72,51 @@ class FakeAuthRepository implements AuthRepository {
   }
 
   @override
-  Future<UserProfile> me() async => throw UnimplementedError();
+  Future<UserProfile> me() async {
+    meCalls += 1;
+    // 缺省给一个「无昵称无头像」的样本（回退到 username 的形态）：
+    // 主壳级测试不必逐个注入。
+    return meHandler?.call() ?? Future.value(buildProfile());
+  }
+
+  @override
+  Future<UserProfile> updateMe(UpdateMeRequest request) async {
+    updateMePayloads.add(request.toJson());
+    if (updateMeHandler == null) throw UnimplementedError();
+    return updateMeHandler!(request);
+  }
 }
 
+/// `/me` 响应样本（契约 v1.4.0 六字段全字段）。
+Map<String, dynamic> sampleMeJson({
+  String userId = 'user-1',
+  String username = 'llx',
+  String? nickname,
+  String? avatarUrl,
+  String? phone = '+8613800138000',
+}) => {
+  'userId': userId,
+  'username': username,
+  'nickname': nickname,
+  'avatarUrl': avatarUrl,
+  'phone': phone,
+  'createdAt': '2026-09-01T10:00:00+08:00',
+};
+
+UserProfile buildProfile({
+  String userId = 'user-1',
+  String username = 'llx',
+  String? nickname,
+  String? avatarUrl,
+}) => UserProfile.fromJson(
+  sampleMeJson(
+    userId: userId,
+    username: username,
+    nickname: nickname,
+    avatarUrl: avatarUrl,
+  ),
+);
+
 /// mock dio：用假 HttpClientAdapter 返回预设响应并记录请求。
 class FakeHttpAdapter implements HttpClientAdapter {
   FakeHttpAdapter(this.handler);

test/helpers/community_test_helpers.dart

@@ -76,13 +76,15 @@ Map<String, dynamic> sampleFeedCardJson({
 
 Map<String, dynamic> sampleCommentJson({
   String id = 'c-1',
+  Map<String, dynamic>? author,
   Map<String, dynamic>? replyToUser,
+  String content = '好可爱！',
 }) => {
   'id': id,
   'postId': 'p-1',
-  'author': sampleAuthorJson(),
+  'author': author ?? sampleAuthorJson(),
   'replyToUser': replyToUser,
-  'content': '好可爱！',
+  'content': content,
   'createdAt': '2026-09-08T11:00:00.000Z',
 };
 
@@ -131,6 +133,57 @@ CursorPage<FeedCard> feedPage(
   bool hasMore = false,
 }) => CursorPage(items: items, nextCursor: nextCursor, hasMore: hasMore);
 
+Post samplePost({
+  String id = 'p-1',
+  bool likedByMe = false,
+  int likeCount = 6,
+  bool bookmarkedByMe = false,
+  int bookmarkCount = 2,
+}) => Post.fromJson(
+  samplePostJson(
+    id: id,
+    likedByMe: likedByMe,
+    likeCount: likeCount,
+    bookmarkedByMe: bookmarkedByMe,
+    bookmarkCount: bookmarkCount,
+  ),
+);
+
+PostComment sampleComment({
+  String id = 'c-1',
+  Map<String, dynamic>? author,
+  Map<String, dynamic>? replyToUser,
+  String content = '好可爱！',
+}) => PostComment.fromJson(
+  sampleCommentJson(
+    id: id,
+    author: author,
+    replyToUser: replyToUser,
+    content: content,
+  ),
+);
+
+CursorPage<PostComment> commentPage(
+  List<PostComment> items, {
+  String? nextCursor,
+  bool hasMore = false,
+}) => CursorPage(items: items, nextCursor: nextCursor, hasMore: hasMore);
+
+/// 草稿样本（T3-17 发布页草稿恢复用；media 可清空为纯文字草稿）。
+Post sampleDraft({
+  String id = 'draft-1',
+  int version = 3,
+  String content = '草稿正文',
+  bool withMedia = true,
+}) => Post.fromJson({
+  ...samplePostJson(id: id, status: 'draft', version: version),
+  'content': content,
+  if (!withMedia) 'media': const <Map<String, dynamic>>[],
+});
+
+CursorPage<Post> postPage(List<Post> items) =>
+    CursorPage(items: items, nextCursor: null, hasMore: false);
+
 /// 假仓库：controller 测试注入行为并记录调用（Completer 控时序）。
 /// 未注入 handler 的方法一律 UnimplementedError（误触发即测试失败）。
 class FakeCommunityRepository implements CommunityRepository {
@@ -141,9 +194,28 @@ class FakeCommunityRepository implements CommunityRepository {
   Future<LikeState> Function(String postId, bool target)? onLikeToggle;
   Future<BookmarkState> Function(String postId, bool target)? onBookmarkToggle;
   Future<Post> Function(String postId)? onGetPost;
+  Future<CursorPage<PostComment>> Function(String postId, String? cursor)?
+  onListComments;
+  Future<PostComment> Function(String postId, CreateCommentRequest request)?
+  onCreateComment;
+  Future<void> Function(String commentId)? onDeleteComment;
+  Future<FollowState> Function(String userId, bool target)? onFollowToggle;
+  Future<FollowStats> Function(String userId)? onGetFollowStats;
+  Future<CommunityStats> Function()? onGetMyCommunityStats;
   Future<MediaUploadCredentials> Function(CreateMediaUploadRequest request)?
   onCreateMediaUpload;
   Future<MediaAsset> Function(String assetId)? onCompleteMediaUpload;
+  Future<Post> Function(CreatePostRequest request, String? idempotencyKey)?
+  onCreatePost;
+  Future<Post> Function(String postId, UpdatePostRequest request)? onUpdatePost;
+  Future<void> Function(String postId)? onDeletePost;
+  Future<CursorPage<Post>> Function(PostStatus? status)? onListMyPosts;
+
+  /// createPost 收到的幂等键顺序（同键重放断言用）。
+  final List<String?> idempotencyKeys = [];
+
+  /// 最近一次 createMediaUpload 的请求（purpose 断言用）。
+  CreateMediaUploadRequest? lastMediaUploadRequest;
 
   @override
   Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor}) {
@@ -186,6 +258,7 @@ class FakeCommunityRepository implements CommunityRepository {
     CreateMediaUploadRequest request,
   ) {
     calls.add('createUpload:${request.mimeType}:${request.byteSize}');
+    lastMediaUploadRequest = request;
     return onCreateMediaUpload!(request);
   }
 
@@ -196,50 +269,118 @@ class FakeCommunityRepository implements CommunityRepository {
   }
 
   @override
-  Future<Post> createPost(CreatePostRequest request) =>
+  Future<Post> createPost(CreatePostRequest request, {String? idempotencyKey}) {
-      throw UnimplementedError();
+    calls.add('createPost:${request.status?.name}:${request.content}');
+    idempotencyKeys.add(idempotencyKey);
+    return onCreatePost!(request, idempotencyKey);
+  }
 
   @override
-  Future<Post> updatePost(String postId, UpdatePostRequest request) =>
+  Future<Post> updatePost(String postId, UpdatePostRequest request) {
-      throw UnimplementedError();
+    calls.add(
+      'updatePost:$postId:v${request.version}:publish=${request.publish}',
+    );
+    return onUpdatePost!(postId, request);
+  }
 
   @override
-  Future<void> deletePost(String postId) => throw UnimplementedError();
+  Future<void> deletePost(String postId) {
+    calls.add('deletePost:$postId');
+    return onDeletePost!(postId);
+  }
 
   @override
   Future<CursorPage<Post>> listMyPosts({
     int? limit,
     String? cursor,
     PostStatus? status,
-  }) => throw UnimplementedError();
+  }) {
+    calls.add('listMyPosts:${status?.name}');
+    return onListMyPosts == null
+        ? Future.value(
+            const CursorPage(items: [], nextCursor: null, hasMore: false),
+          )
+        : onListMyPosts!(status);
+  }
 
   @override
   Future<CursorPage<PostComment>> listComments(
     String postId, {
     int? limit,
     String? cursor,
-  }) => throw UnimplementedError();
+  }) {
+    calls.add('comments:$postId:cursor=$cursor');
+    return onListComments!(postId, cursor);
+  }
 
   @override
   Future<PostComment> createComment(
     String postId,
     CreateCommentRequest request,
-  ) => throw UnimplementedError();
+  ) {
+    calls.add('createComment:$postId:${request.content}');
+    return onCreateComment!(postId, request);
+  }
 
   @override
-  Future<void> deleteComment(String commentId) => throw UnimplementedError();
+  Future<void> deleteComment(String commentId) {
+    calls.add('deleteComment:$commentId');
+    return onDeleteComment!(commentId);
+  }
+
+  @override
+  Future<FollowState> followUser(String userId) {
+    calls.add('follow:$userId');
+    return onFollowToggle!(userId, true);
+  }
+
+  @override
+  Future<FollowState> unfollowUser(String userId) {
+    calls.add('unfollow:$userId');
+    return onFollowToggle!(userId, false);
+  }
+
+  @override
+  Future<FollowStats> getFollowStats(String userId) {
+    calls.add('followStats:$userId');
+    return onGetFollowStats?.call(userId) ??
+        Future.value(FollowStats.fromJson(sampleFollowStatsJson()));
+  }
+
+  @override
+  Future<CommunityStats> getMyCommunityStats() {
+    calls.add('communityStats');
+    return onGetMyCommunityStats?.call() ??
+        // 缺省零值（契约：空数据返回 0 而非 null，且永不 404）。
+        Future.value(
+          CommunityStats.fromJson(
+            sampleCommunityStatsJson(
+              receivedLikeCount: 0,
+              publishedPostCount: 0,
+            ),
+          ),
+        );
+  }
 
   @override
   Future<CursorPage<FeedCard>> listMyBookmarks({int? limit, String? cursor}) =>
       throw UnimplementedError();
-
-  @override
-  Future<FollowState> followUser(String userId) => throw UnimplementedError();
-
-  @override
-  Future<FollowState> unfollowUser(String userId) => throw UnimplementedError();
-
-  @override
-  Future<FollowStats> getFollowStats(String userId) =>
-      throw UnimplementedError();
 }
+
+Map<String, dynamic> sampleCommunityStatsJson({
+  int receivedLikeCount = 128,
+  int publishedPostCount = 12,
+}) => {
+  'receivedLikeCount': receivedLikeCount,
+  'publishedPostCount': publishedPostCount,
+};
+
+Map<String, dynamic> sampleFollowStatsJson({
+  int followerCount = 24,
+  int followingCount = 7,
+  bool followedByMe = false,
+}) => {
+  'followerCount': followerCount,
+  'followingCount': followingCount,
+  'followedByMe': followedByMe,
+};

test/helpers/media_test_helpers.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:patbond_flutter/features/community/community_models.dart';
@@ -14,6 +15,17 @@ PickedMediaImage pickedImage({int seed = 1, int size = 64}) => PickedMediaImage(
   name: 'img-$seed.jpg',
 );
 
+/// 1x1 真 PNG 字节（70B）：widget 测试里九宫格格子要真解码出图,
+/// 用可解码的最小合法图片避免 Image.memory 走 errorBuilder 兜底。
+final Uint8List tinyPngBytes = base64Decode(
+  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAF'
+  'AAH/q842iQAAAABJRU5ErkJggg==',
+);
+
+/// 可解码预览的选图（发布页 widget 测试用）。
+PickedMediaImage decodablePickedImage({int seed = 1}) =>
+    PickedMediaImage(bytes: tinyPngBytes, name: 'img-$seed.png');
+
 MediaUploadCredentials credentials({
   String assetId = 'a-1',
   DateTime? expiresAt,

test/helpers/pet_test_helpers.dart

@@ -1,4 +1,4 @@
-/// pets 域测试样本（契约 openapi.yaml v1.2.0 各 schema 全字段 JSON）
+/// pets 域测试样本（契约 openapi.yaml v1.4.0 各 schema 全字段 JSON）
 /// 与共享假仓库。
 library;
 
@@ -27,6 +27,7 @@ Map<String, dynamic> samplePetJson({
   'microchipNo': null,
   'sterilizedOn': null,
   'status': 'active',
+  'avatarUrl': null,
   'myRole': 'owner',
   'createdAt': '2026-09-01T10:00:00+08:00',
   'updatedAt': '2026-09-02T10:00:00+08:00',

test/smoke/detail_interactions_smoke_test.dart

@@ -0,0 +1,268 @@
+import 'dart:async';
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/core/network/api_client.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/core/network/token_refresher.dart';
+import 'package:patbond_flutter/features/auth/auth_models.dart';
+import 'package:patbond_flutter/features/auth/session_manager.dart';
+import 'package:patbond_flutter/features/community/community_controller.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:patbond_flutter/features/community/community_repository.dart';
+import 'package:uuid/uuid.dart';
+
+import '../helpers/auth_test_helpers.dart';
+
+/// T3-15/16 compose 真链路冒烟（默认跳过，不计入常规测试套件）：
+///
+/// ```bash
+/// # 先起后端六容器（patbond-api 仓库根）：
+/// #   ./deploy/init-secrets.sh
+/// #   JAVA_HOME=<JDK17> ./mvnw -DskipTests package && docker compose up -d --build
+/// PATBOND_DETAIL_SMOKE=1 flutter test test/smoke/detail_interactions_smoke_test.dart
+/// ```
+///
+/// 覆盖：发帖 → 点赞（含重复施加幂等）→ 收藏/取消 → 评论创建
+/// （Idempotency-Key）→ 仅作者删除评论 → 计数权威对账；再走一轮
+/// **断网点赞回滚**——[CommunityController]/ToggleSync 生产实现 +
+/// 生产 ApiClient 错误链，community 端点切至不可达端口模拟断网
+/// （连接拒绝走真实 ApiNetworkException 路径），断言乐观翻转即刻
+/// 可见、失败后快照回滚、网络恢复后权威终态收敛。
+void main() {
+  final enabled = Platform.environment['PATBOND_DETAIL_SMOKE'] == '1';
+  final env = Platform.environment;
+  final authBase = env['PATBOND_SMOKE_AUTH_BASE'] ?? 'http://127.0.0.1:8081';
+  final communityBase =
+      env['PATBOND_SMOKE_COMMUNITY_BASE'] ?? 'http://127.0.0.1:8084';
+
+  test(
+    '点赞/收藏/评论/删评真链路一轮 + 断网点赞回滚',
+    () async {
+      // ---- 注册一次性账号（随机凭据，不落任何持久化）----
+      final dio = Dio(BaseOptions(validateStatus: (_) => true));
+      final seed = DateTime.now().millisecondsSinceEpoch;
+      final register = await dio.post<Map<String, dynamic>>(
+        '$authBase/api/v1/auth/register',
+        data: {
+          'username': 'ismoke$seed',
+          'phone': '+86138${(seed % 100000000).toString().padLeft(8, '0')}',
+          'password': 'Smoke1234!$seed',
+        },
+        options: Options(
+          headers: {
+            'Idempotency-Key': const Uuid().v4(),
+            'X-Device-Id': const Uuid().v4(),
+          },
+        ),
+      );
+      expect(register.data?['code'], 0, reason: '注册失败：${register.data}');
+
+      final session = SessionManager(store: InMemoryTokenStore());
+      await session.updateTokens(
+        AuthTokens.fromJson(register.data!['data'] as Map<String, dynamic>),
+      );
+      final refresher = TokenRefresher(
+        dio: buildPatbondDio(session: session, baseUrl: authBase),
+        session: session,
+      );
+      final live = ApiCommunityRepository(
+        api: ApiClient(
+          dio: buildPatbondDio(session: session, baseUrl: communityBase),
+          session: session,
+          refresher: refresher,
+        ),
+      );
+      // 「断网」形态：community 域切至不可达端口（连接拒绝 → 生产
+      // ApiClient 映射 ApiNetworkException，与真实断网同一异常链）。
+      final dead = ApiCommunityRepository(
+        api: ApiClient(
+          dio: buildPatbondDio(session: session, baseUrl: 'http://127.0.0.1:9'),
+          session: session,
+          refresher: refresher,
+        ),
+      );
+      final switchable = _SwitchableRepository(live);
+
+      // ---- 发帖（published，纯文字）----
+      final post = await live.createPost(
+        CreatePostRequest(
+          content: 'T3-15/16 互动冒烟 $seed',
+          status: PostStatus.published,
+        ),
+      );
+      expect(post.likeCount, 0);
+      expect(post.commentCount, 0);
+
+      // ---- 点赞：施加 / 重复施加幂等，权威终态 ----
+      var like = await live.likePost(post.id);
+      expect(like.liked, true);
+      expect(like.likeCount, 1);
+      like = await live.likePost(post.id);
+      expect(like.likeCount, 1, reason: '重复 PUT 不重复计数');
+
+      // ---- 收藏 / 取消 ----
+      var bookmark = await live.bookmarkPost(post.id);
+      expect(bookmark.bookmarked, true);
+      expect(bookmark.bookmarkCount, 1);
+      bookmark = await live.unbookmarkPost(post.id);
+      expect(bookmark.bookmarked, false);
+      expect(bookmark.bookmarkCount, 0);
+
+      // ---- 评论创建（Idempotency-Key 由仓库层携带）→ 计数 +1 ----
+      final comment = await live.createComment(
+        post.id,
+        const CreateCommentRequest(content: '冒烟评论：真链路一轮'),
+      );
+      expect(comment.content, '冒烟评论：真链路一轮');
+      var fresh = await live.getPost(post.id);
+      expect(fresh.commentCount, 1);
+
+      // ---- 仅作者删除评论 → 计数 -1、列表剔除 ----
+      await live.deleteComment(comment.id);
+      fresh = await live.getPost(post.id);
+      expect(fresh.commentCount, 0);
+      final comments = await live.listComments(post.id);
+      expect(comments.items, isEmpty);
+
+      // ---- 断网点赞回滚（生产 CommunityController + ToggleSync）----
+      final controller = CommunityController(repository: switchable);
+      await controller.refresh();
+      FeedCard card() => controller.feed.firstWhere((c) => c.id == post.id);
+      expect(card().likedByMe, true);
+      expect(card().likeCount, 1);
+
+      switchable.target = dead; // 拔网线。
+      final errored = Completer<void>();
+      controller.addListener(() {
+        if (controller.toggleError != null && !errored.isCompleted) {
+          errored.complete();
+        }
+      });
+      controller.toggleLike(post.id);
+      // 乐观翻转同帧可见。
+      expect(card().likedByMe, false);
+      expect(card().likeCount, 0);
+
+      await errored.future.timeout(const Duration(seconds: 30));
+      // 快照回滚成对恢复 + 一次性错误可供 SnackBar 消费。
+      expect(card().likedByMe, true);
+      expect(card().likeCount, 1);
+      expect(controller.toggleError, isA<ApiNetworkException>());
+      controller.clearToggleError();
+
+      // ---- 网络恢复：取消点赞收敛到服务端权威终态 ----
+      switchable.target = live;
+      controller.toggleLike(post.id);
+      expect(card().likedByMe, false); // 乐观翻转。
+      // 轮询服务端权威终态（乐观值不作为收敛依据）。
+      final deadline = DateTime.now().add(const Duration(seconds: 15));
+      Post settled = await live.getPost(post.id);
+      while (settled.likedByMe) {
+        expect(DateTime.now().isBefore(deadline), true, reason: '收敛超时');
+        await Future<void>.delayed(const Duration(milliseconds: 300));
+        settled = await live.getPost(post.id);
+      }
+      expect(settled.likedByMe, false);
+      expect(settled.likeCount, 0);
+      expect(controller.toggleError, isNull);
+      expect(card().likedByMe, false);
+      controller.dispose();
+    },
+    skip: enabled ? false : '设 PATBOND_DETAIL_SMOKE=1 且后端六容器在本机运行时才执行',
+    timeout: const Timeout(Duration(minutes: 3)),
+  );
+}
+
+/// 可切换目标的仓库代理（断网模拟：live ↔ dead 端点整体切换）。
+class _SwitchableRepository implements CommunityRepository {
+  _SwitchableRepository(this.target);
+
+  CommunityRepository target;
+
+  @override
+  Future<MediaUploadCredentials> createMediaUpload(
+    CreateMediaUploadRequest request,
+  ) => target.createMediaUpload(request);
+
+  @override
+  Future<MediaAsset> completeMediaUpload(String assetId) =>
+      target.completeMediaUpload(assetId);
+
+  @override
+  Future<Post> createPost(
+    CreatePostRequest request, {
+    String? idempotencyKey,
+  }) => target.createPost(request, idempotencyKey: idempotencyKey);
+
+  @override
+  Future<Post> getPost(String postId) => target.getPost(postId);
+
+  @override
+  Future<Post> updatePost(String postId, UpdatePostRequest request) =>
+      target.updatePost(postId, request);
+
+  @override
+  Future<void> deletePost(String postId) => target.deletePost(postId);
+
+  @override
+  Future<CursorPage<Post>> listMyPosts({
+    int? limit,
+    String? cursor,
+    PostStatus? status,
+  }) => target.listMyPosts(limit: limit, cursor: cursor, status: status);
+
+  @override
+  Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor}) =>
+      target.getFeed(limit: limit, cursor: cursor);
+
+  @override
+  Future<CursorPage<PostComment>> listComments(
+    String postId, {
+    int? limit,
+    String? cursor,
+  }) => target.listComments(postId, limit: limit, cursor: cursor);
+
+  @override
+  Future<PostComment> createComment(
+    String postId,
+    CreateCommentRequest request,
+  ) => target.createComment(postId, request);
+
+  @override
+  Future<void> deleteComment(String commentId) =>
+      target.deleteComment(commentId);
+
+  @override
+  Future<LikeState> likePost(String postId) => target.likePost(postId);
+
+  @override
+  Future<LikeState> unlikePost(String postId) => target.unlikePost(postId);
+
+  @override
+  Future<BookmarkState> bookmarkPost(String postId) =>
+      target.bookmarkPost(postId);
+
+  @override
+  Future<BookmarkState> unbookmarkPost(String postId) =>
+      target.unbookmarkPost(postId);
+
+  @override
+  Future<CursorPage<FeedCard>> listMyBookmarks({int? limit, String? cursor}) =>
+      target.listMyBookmarks(limit: limit, cursor: cursor);
+
+  @override
+  Future<CommunityStats> getMyCommunityStats() => target.getMyCommunityStats();
+
+  @override
+  Future<FollowState> followUser(String userId) => target.followUser(userId);
+
+  @override
+  Future<FollowState> unfollowUser(String userId) =>
+      target.unfollowUser(userId);
+
+  @override
+  Future<FollowStats> getFollowStats(String userId) =>
+      target.getFollowStats(userId);
+}