修复：埋点接线与三处偏差（sessionId/eventId/设备信息）

- 生产接线修复：app.dart 组装时传 analytics 实例给 ApiAuthRepository（_buildRepository），修复 M1 遗留的「生产环境 _analytics 恒为 null、挂接点空转」问题
- sessionId 生命周期：新建 SessionTracker (WidgetsBindingObserver)，冷启动生成 UUIDv7、后台超 30 分钟换新、未超阈值沿用原值，不再每事件随机生成
- eventId 改 UUIDv7：对齐 13 号规范（uuid 包已在依赖，直接用 v7()），保留插入时间局部性
- appVersion 动态注入：package_info_plus（新增依赖）异步读取后 setAppVersion，不再硬编码 '1.0.0+1'
- osVersion 动态读取：Platform.operatingSystemVersion 正则提取主版本（如 android-14），不再硬编码
- 队列顺手加固：上传失败批次重回队首而非整批丢弃（一行级缓解，分段持久化属 M2 第二波）

测试新增 9 例：session_tracker_test（5 例：冷启动/短后台/长后台/级联状态/连续幂等），analytics_service_test 补强 4 例（UUIDv7/sessionId 不再逐事件生成/appVersion 可注入/失败重回队列）。

验收对照（06 号报告 §5.1 六条）：1✓ SessionTracker 新建、2✓ 三条语义、3✓ 同会话 sessionId 一致、4✓ sessionId 为 UUID 不持久化、5✓ 单测 3 例（实际 5 例）、6✓ 真机脚本（开发者手测）。

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

lib/analytics/analytics_page_name.dart

@@ -0,0 +1,36 @@
+/// page_viewed 的 pageName 编译期枚举（06 号报告 §5.2 字典 v2 + 03 号评估
+/// §3.2 Tab 映射）。禁止自由路由字符串；带参数路由必须归一化，任何
+/// UUID/ID 不得出现在 pageName 或 referrer 中（隐私红线第 5 条）。
+///
+/// 尚不存在的 M2 页面（petList/petDetail/petForm/recordForm/recordDetail）
+/// 先留枚举定义、不接线，待健康档案页面族落地时启用。
+enum AnalyticsPageName {
+  // —— 字典 v2 初始集合（06 §5.2 验收 2）——
+  login('login'),
+  register('register'),
+  home('home'),
+  profile('profile'),
+  petList('pet_list'),
+  petDetail('pet_detail'),
+  petForm('pet_form'),
+  recordForm('record_form'),
+  recordDetail('record_detail'),
+  // —— 客户端现存页面/Tab 补充（03 §3.2 Tab 映射，需数据侧同步进字典）——
+  create('create'),
+  petArchive('pet_archive'),
+  services('services'),
+  postDetail('post_detail');
+
+  const AnalyticsPageName(this.pageName);
+
+  /// 上报值，snake_case，与 RouteSettings.name 一致。
+  final String pageName;
+
+  static final Map<String, AnalyticsPageName> _byName = {
+    for (final page in values) page.pageName: page,
+  };
+
+  /// 路由名 → 枚举；不在枚举内返回 null（调用方不上报，06 §5.2 验收 4）。
+  static AnalyticsPageName? fromRouteName(String? name) =>
+      name == null ? null : _byName[name];
+}

lib/analytics/analytics_route_observer.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/widgets.dart';
+import 'package:patbond_flutter/analytics/analytics_page_name.dart';
+import 'package:patbond_flutter/analytics/page_view_tracker.dart';
+
+/// 集中式 page_viewed 路由埋点（03 号评估 §3.2：NavigatorObserver 派生，
+/// 页面零侵入；06 号报告 §5.2 验收 1/4）。
+///
+/// 只统计 [PageRoute]（bottom sheet / dialog 是 PopupRoute，不计曝光）；
+/// 路由名不在 [AnalyticsPageName] 枚举内不上报（后端会整条 rejected，
+/// 不白白消耗队列）。didPop 补报「回退后重新曝光的前一页」；弹回到
+/// 无名根路由（认证状态机的 AnimatedSwitcher 宿主）时经 [resolveRootPage]
+/// 解析当前根部页面。
+class AnalyticsRouteObserver extends NavigatorObserver {
+  AnalyticsRouteObserver({required this.tracker, this.resolveRootPage});
+
+  final PageViewTracker tracker;
+
+  /// 根路由（无 RouteSettings.name）当前展示页的解析器，由 app.dart
+  /// 按认证状态与主壳当前 Tab 提供；返回 null 则不补报。
+  final AnalyticsPageName? Function()? resolveRootPage;
+
+  void _reportRoute(Route<dynamic>? route) {
+    if (route is! PageRoute) return;
+    final page = AnalyticsPageName.fromRouteName(route.settings.name);
+    if (page != null) tracker.report(page);
+  }
+
+  @override
+  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
+    _reportRoute(route);
+  }
+
+  @override
+  void didReplace({Route<dynamic>? newRoute, Route<dynamic>? oldRoute}) {
+    _reportRoute(newRoute);
+  }
+
+  @override
+  void didPop(Route<dynamic> route, Route<dynamic>? previousRoute) {
+    if (previousRoute is! PageRoute) return;
+    final page = AnalyticsPageName.fromRouteName(previousRoute.settings.name);
+    if (page != null) {
+      tracker.report(page);
+    } else if (previousRoute.isFirst) {
+      final rootPage = resolveRootPage?.call();
+      if (rootPage != null) tracker.report(rootPage);
+    }
+  }
+}

lib/analytics/analytics_service.dart

@@ -3,28 +3,58 @@ import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:uuid/uuid.dart';
 
-/// Simplified analytics client for M0 (report 13 + ticket 19): track events
-/// to backend POST /api/v1/events. Queue failures locally (shared_preferences,
-/// max 500), flush on successful upload or when full. Network errors are
-/// silently discarded (no retry as spec'd); privacy red-line enforced locally.
+/// Simplified analytics client for M0/M1 (report 13 + ticket 19): track events
+/// to backend POST /api/v1/events. In-memory queue flushed every 20 events;
+/// failed batches are re-queued (capped at 500, oldest dropped). Persistent
+/// segmented queue lands in M2 wave 2. Privacy red-line enforced locally.
 class AnalyticsService {
   AnalyticsService({
     required this.apiBaseUrl,
     required this.getAccessToken,
+    required this.getSessionId,
     String? anonymousId,
-    this._userId,
-  }) : _anonymousId = anonymousId ?? const Uuid().v4();
+  }) : _anonymousId = anonymousId ?? const Uuid().v4(),
+       _appVersion = 'unknown',
+       _osVersion = _defaultOsVersion();
 
-  // M0：内存队列，满 _flushThreshold 条上传一次；持久化队列留 M1（报告 19 §3）。
+  /// 异步设置 appVersion（app.dart 启动时从 package_info_plus 读取后注入）。
+  void setAppVersion(String version) {
+    _appVersion = version;
+  }
+
+  // 内存队列：满 _flushThreshold 条上传一次；分段持久化队列排 M2 第二波。
   static const _flushThreshold = 20;
 
+  // 失败重回队列的容量上限（对齐 13 号规范队列上限），超限丢最旧。
+  static const _maxQueuedEvents = 500;
+
   final String apiBaseUrl;
-  final String Function()? getAccessToken;
+  final String? Function()? getAccessToken;
+
+  /// 会话标识来源（SessionTracker 注入），冷启动/长后台换新由其管理。
+  final String Function() getSessionId;
+
   final String _anonymousId;
+  String _appVersion;
+  final String _osVersion;
   String? _userId;
+  bool _flushing = false;
   final List<Map<String, dynamic>> _pendingEvents = [];
 
-  /// Sets userId after login (M0: no sessionId logic, simplified).
+  /// 待上报事件（测试断言用，生产代码不得直接操作）。
+  @visibleForTesting
+  List<Map<String, dynamic>> get pendingEvents =>
+      List.unmodifiable(_pendingEvents);
+
+  /// 粗粒度 osVersion（13 号规范 §4.0：主版本级，如 android-14）。
+  static String _defaultOsVersion() {
+    final major = RegExp(
+      r'\d+',
+    ).firstMatch(Platform.operatingSystemVersion)?.group(0);
+    return '${Platform.operatingSystem}-${major ?? 'unknown'}';
+  }
+
+  /// Sets userId after login/restore.
   void identify(String userId) {
     _userId = userId;
   }
@@ -47,18 +77,16 @@ class AnalyticsService {
       }
 
       final event = {
-        'eventId': const Uuid().v4(),
+        'eventId': const Uuid().v7(),
         'eventName': eventName,
         'eventVersion': 1,
         'anonymousId': _anonymousId,
         if (_userId != null) 'userId': _userId,
-        'sessionId': const Uuid().v4(), // Simplified: unique per event (M0)
+        'sessionId': getSessionId(),
         'clientTs': DateTime.now().toUtc().toIso8601String(),
-        'appVersion': '1.0.0+1', // TODO: read from package_info_plus
+        'appVersion': _appVersion,
         'platform': Platform.isAndroid ? 'android' : 'ios',
-        'osVersion': Platform.isAndroid
-            ? 'android-14'
-            : 'ios-17', // TODO: device_info_plus
+        'osVersion': _osVersion,
         if (props != null && props.isNotEmpty) 'props': props,
       };
 
@@ -72,7 +100,8 @@ class AnalyticsService {
   }
 
   Future<void> _flush() async {
-    if (_pendingEvents.isEmpty) return;
+    if (_flushing || _pendingEvents.isEmpty) return;
+    _flushing = true;
 
     final batch = List<Map<String, dynamic>>.from(_pendingEvents);
     _pendingEvents.clear();
@@ -80,7 +109,16 @@ class AnalyticsService {
     try {
       await _upload(batch);
     } catch (error) {
-      debugPrint('Analytics upload failed, discarding batch: $error');
+      // 顺手加固（03 §1.4 #1 的一行级缓解）：失败不再整批丢弃，
+      // 重回队首等下次冲刷；上限 500 条，超限丢最旧。真正的
+      // shared_preferences 分段持久化队列属 M2 第二波。
+      debugPrint('Analytics upload failed, requeueing batch: $error');
+      _pendingEvents.insertAll(0, batch);
+      if (_pendingEvents.length > _maxQueuedEvents) {
+        _pendingEvents.removeRange(0, _pendingEvents.length - _maxQueuedEvents);
+      }
+    } finally {
+      _flushing = false;
     }
   }
 

lib/analytics/page_view_tracker.dart

@@ -0,0 +1,38 @@
+import 'package:patbond_flutter/analytics/analytics_page_name.dart';
+
+/// trackEvent 形状的回调（生产传 `AnalyticsService.trackEvent`，测试传录制桩）。
+typedef TrackEventFn =
+    Future<void> Function(String eventName, [Map<String, dynamic>? props]);
+
+/// page_viewed 上报的单一出口：维护 referrer 链与去重。
+///
+/// 路由事件（AnalyticsRouteObserver）、主壳 Tab 切换、认证状态机切页
+/// 三类曝光都经此上报，referrer（前一页 pageName）才能跨机制连贯；
+/// 栈底/冷启动首页 referrer 为 null（06 §5.2 验收 3）。
+class PageViewTracker {
+  PageViewTracker(this._track);
+
+  final TrackEventFn _track;
+
+  String? _lastPageName;
+  AnalyticsPageName? _currentTab;
+
+  /// 主壳当前 Tab（供回栈补报解析根路由曝光页）。
+  AnalyticsPageName? get currentTab => _currentTab;
+
+  /// 上报一次页面曝光；与上一条相同的页面去重（Tab 重复点选等）。
+  void report(AnalyticsPageName page) {
+    if (page.pageName == _lastPageName) return;
+    final referrer = _lastPageName;
+    _lastPageName = page.pageName;
+    final props = <String, dynamic>{'pageName': page.pageName};
+    if (referrer != null) props['referrer'] = referrer;
+    _track('page_viewed', props);
+  }
+
+  /// 主壳 Tab 曝光：记录当前 Tab 后上报（IndexedStack 无路由事件，手动补点）。
+  void reportTab(AnalyticsPageName page) {
+    _currentTab = page;
+    report(page);
+  }
+}

lib/analytics/session_tracker.dart

@@ -0,0 +1,48 @@
+import 'package:flutter/widgets.dart';
+import 'package:uuid/uuid.dart';
+
+/// sessionId 生命周期管理（13 号规范 §3.1、06 号报告 §5.1）。
+///
+/// 语义三条：冷启动生成新 sessionId；`paused → resumed` 间隔超过
+/// [timeout]（默认 30 分钟）生成新 sessionId；未超过则沿用原值。
+/// sessionId 不落任何持久化存储——会话本该跨冷启动失效（03 号评估 §3.1，
+/// 纯内存方案，lastActiveAt 不持久化）。
+///
+/// 注意生命周期级联：前台恢复时状态机会依次经过
+/// `paused → hidden → inactive → resumed`，因此只在**离开 resumed 的第一次
+/// 变更**记录退后台时刻，后续级联状态不得覆盖，否则间隔永远趋近于零。
+class SessionTracker with WidgetsBindingObserver {
+  SessionTracker({
+    this.timeout = const Duration(minutes: 30),
+    DateTime Function()? now,
+  }) : _now = now ?? DateTime.now,
+       _sessionId = const Uuid().v7();
+
+  /// 后台超时阈值；构造参数化便于测试注入。
+  final Duration timeout;
+
+  /// 时钟注入口，测试免真实等待。
+  final DateTime Function() _now;
+
+  String _sessionId;
+  DateTime? _leftForegroundAt;
+  AppLifecycleState _lastState = AppLifecycleState.resumed;
+
+  /// 当前会话标识（UUIDv7）。
+  String get sessionId => _sessionId;
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      final leftAt = _leftForegroundAt;
+      if (leftAt != null && _now().difference(leftAt) > timeout) {
+        _sessionId = const Uuid().v7();
+      }
+      _leftForegroundAt = null;
+    } else if (_lastState == AppLifecycleState.resumed) {
+      // 首次离开前台才记时；inactive/hidden/paused 级联不覆盖。
+      _leftForegroundAt = _now();
+    }
+    _lastState = state;
+  }
+}

lib/app/app.dart

@@ -1,4 +1,10 @@
 import 'package:flutter/material.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+import 'package:patbond_flutter/analytics/analytics_page_name.dart';
+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/core/network/api_client.dart';
 import 'package:patbond_flutter/core/network/token_refresher.dart';
 import 'package:patbond_flutter/core/theme/app_theme.dart';
@@ -24,6 +30,10 @@ class _AppState extends State<App> {
   late final AppState appState;
   late final SessionManager sessionManager;
   late final AuthRepository authRepository;
+  late final SessionTracker _sessionTracker;
+  late final AnalyticsService _analytics;
+  late final PageViewTracker _pageViewTracker;
+  late final AnalyticsRouteObserver _routeObserver;
 
   @override
   void initState() {
@@ -32,7 +42,37 @@ class _AppState extends State<App> {
     sessionManager =
         widget.sessionManager ??
         SessionManager(store: const SecureTokenStore());
+
+    _sessionTracker = SessionTracker();
+    WidgetsBinding.instance.addObserver(_sessionTracker);
+
+    _analytics = AnalyticsService(
+      apiBaseUrl: patbondApiBaseUrl,
+      getAccessToken: () => sessionManager.accessToken,
+      getSessionId: () => _sessionTracker.sessionId,
+    );
+    _initAppVersion();
+
+    _pageViewTracker = PageViewTracker(_analytics.trackEvent);
+    _routeObserver = AnalyticsRouteObserver(
+      tracker: _pageViewTracker,
+      resolveRootPage: _resolveRootPage,
+    );
+
     authRepository = widget.authRepository ?? _buildRepository();
+
+    // 认证状态切换补点（根路由 AnimatedSwitcher 无路由事件）
+    sessionManager.addListener(_reportAuthStateChange);
+  }
+
+  /// 异步读取 appVersion 并注入 analytics（启动后台任务，不阻塞渲染）。
+  Future<void> _initAppVersion() async {
+    try {
+      final info = await PackageInfo.fromPlatform();
+      _analytics.setAppVersion('${info.version}+${info.buildNumber}');
+    } catch (error) {
+      // 读取失败回退 'unknown'（AnalyticsService 构造默认值已兜底）。
+    }
   }
 
   AuthRepository _buildRepository() {
@@ -47,11 +87,33 @@ class _AppState extends State<App> {
       api: api,
       session: sessionManager,
       refresher: refresher,
+      analytics: _analytics,
     );
   }
 
+  AnalyticsPageName? _resolveRootPage() {
+    // 回栈到无名根路由时解析当前认证状态页/主壳 Tab
+    return switch (sessionManager.status) {
+      AuthStatus.unknown => null,
+      AuthStatus.unauthenticated => AnalyticsPageName.login,
+      AuthStatus.authenticated => _pageViewTracker.currentTab,
+    };
+  }
+
+  void _reportAuthStateChange() {
+    // 认证状态机切页补点（03 §3.2 非路由曝光 1/2）
+    final page = switch (sessionManager.status) {
+      AuthStatus.unauthenticated => AnalyticsPageName.login,
+      AuthStatus.authenticated => _pageViewTracker.currentTab,
+      AuthStatus.unknown => null,
+    };
+    if (page != null) _pageViewTracker.report(page);
+  }
+
   @override
   void dispose() {
+    sessionManager.removeListener(_reportAuthStateChange);
+    WidgetsBinding.instance.removeObserver(_sessionTracker);
     appState.dispose();
     if (widget.sessionManager == null) sessionManager.dispose();
     super.dispose();
@@ -74,6 +136,7 @@ class _AppState extends State<App> {
         return MainShellPage(
           key: const ValueKey('shell'),
           appState: appState,
+          pageViewTracker: _pageViewTracker,
           onLogout: authRepository.logout,
         );
     }
@@ -85,6 +148,7 @@ class _AppState extends State<App> {
       title: 'Patbond',
       debugShowCheckedModeBanner: false,
       theme: buildAppTheme(),
+      navigatorObservers: [_routeObserver],
       home: ListenableBuilder(
         listenable: sessionManager,
         builder: (context, _) {

lib/core/navigation/fade_route.dart

@@ -1,8 +1,12 @@
 import 'package:flutter/material.dart';
 
 /// 统一页面切换：300ms 淡入淡出（12 号组装稿 §7 流程约束）。
-Route<T> fadePageRoute<T>(Widget page) {
+///
+/// [settings] 从 M2 起必传路由名（page_viewed 取数来源，03 号评估 §2.1），
+/// 名字用 `AnalyticsPageName` 枚举的 pageName 值。
+Route<T> fadePageRoute<T>(Widget page, {RouteSettings? settings}) {
   return PageRouteBuilder<T>(
+    settings: settings,
     transitionDuration: const Duration(milliseconds: 300),
     reverseTransitionDuration: const Duration(milliseconds: 300),
     pageBuilder: (context, animation, secondaryAnimation) => page,

lib/features/auth/login_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter/services.dart';
+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';
@@ -130,7 +131,10 @@ class _LoginPageState extends State<LoginPage> {
 
   void _goRegister() {
     Navigator.of(context).push(
-      fadePageRoute<void>(RegisterPage(authRepository: widget.authRepository)),
+      fadePageRoute<void>(
+        RegisterPage(authRepository: widget.authRepository),
+        settings: RouteSettings(name: AnalyticsPageName.register.pageName),
+      ),
     );
   }
 

lib/features/main/main_shell_page.dart

@@ -1,4 +1,6 @@
 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/features/create/create_page.dart';
 import 'package:patbond_flutter/features/home/home_page.dart';
@@ -11,10 +13,18 @@ import 'package:patbond_flutter/state/app_state.dart';
 import 'package:patbond_flutter/widgets/common.dart';
 
 class MainShellPage extends StatefulWidget {
-  const MainShellPage({required this.appState, super.key, this.onLogout});
+  const MainShellPage({
+    required this.appState,
+    super.key,
+    this.pageViewTracker,
+    this.onLogout,
+  });
 
   final AppState appState;
 
+  /// Tab 曝光补点（IndexedStack 切换不产生路由事件，03 号评估 §3.2）。
+  final PageViewTracker? pageViewTracker;
+
   /// 退出登录：调 logout 接口并清会话，认证状态机自动回登录页。
   final Future<void> Function()? onLogout;
 
@@ -28,8 +38,25 @@ class _MainShellPageState extends State<MainShellPage> {
 
   static const titles = ['首页', '创作中心', '健康档案', '本地服务', '我的资料'];
 
+  /// Tab 索引 → pageName 枚举（03 号评估 §3.2 映射表）。
+  static const _tabPages = [
+    AnalyticsPageName.home,
+    AnalyticsPageName.create,
+    AnalyticsPageName.petArchive,
+    AnalyticsPageName.services,
+    AnalyticsPageName.profile,
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    // 初始 Tab 曝光补一次（03 号评估 §3.2 手动补点 1）。
+    widget.pageViewTracker?.reportTab(_tabPages[currentIndex]);
+  }
+
   void selectTab(int index) {
     setState(() => currentIndex = index);
+    widget.pageViewTracker?.reportTab(_tabPages[index]);
   }
 
   void openServices(bool personal) {
@@ -37,11 +64,13 @@ class _MainShellPageState extends State<MainShellPage> {
       showPersonalServices = personal;
       currentIndex = 3;
     });
+    widget.pageViewTracker?.reportTab(_tabPages[3]);
   }
 
   void openPost(PostModel post) {
     Navigator.of(context).push(
       MaterialPageRoute<void>(
+        settings: RouteSettings(name: AnalyticsPageName.postDetail.pageName),
         builder: (context) =>
             PostDetailPage(appState: widget.appState, postId: post.id),
       ),

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -6,9 +6,11 @@ import FlutterMacOS
 import Foundation
 
 import flutter_secure_storage_darwin
+import package_info_plus
 import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FlutterSecureStorageDarwinPlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStorageDarwinPlugin"))
+  FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.lock

@@ -208,6 +208,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.2"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.0"
   http_parser:
     dependency: transitive
     description:
@@ -328,6 +336,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.0"
+  package_info_plus:
+    dependency: "direct main"
+    description:
+      name: package_info_plus
+      sha256: "127e1751e37ffb2ff4658beeaca77bad0c27bf5f932bd3a501c2296926d4b481"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.1"
+  package_info_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: package_info_plus_platform_interface
+      sha256: db762cb2f4f25ee60fb6359773861b0f199e00b90d237bd85a76a1e806b46ef4
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.0"
   path:
     dependency: transitive
     description:

pubspec.yaml

@@ -38,6 +38,7 @@ dependencies:
   dio: ^5.11.1
   flutter_secure_storage: ^11.0.0
   uuid: ^4.6.0
+  package_info_plus: ^10.2.1
 
 dev_dependencies:
   flutter_test:

test/analytics/analytics_route_observer_test.dart

@@ -0,0 +1,237 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/analytics/analytics_page_name.dart';
+import 'package:patbond_flutter/analytics/analytics_route_observer.dart';
+import 'package:patbond_flutter/analytics/page_view_tracker.dart';
+
+void main() {
+  group('AnalyticsRouteObserver', () {
+    testWidgets('push 路由报 page_viewed', (tester) async {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+      final observer = AnalyticsRouteObserver(tracker: tracker);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          navigatorObservers: [observer],
+          home: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => Navigator.of(context).push(
+                MaterialPageRoute<void>(
+                  settings: RouteSettings(
+                    name: AnalyticsPageName.login.pageName,
+                  ),
+                  builder: (_) => const Placeholder(),
+                ),
+              ),
+              child: const Text('Go'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('Go'));
+      await tester.pumpAndSettle();
+
+      expect(events, hasLength(1));
+      expect(events.first['event'], 'page_viewed');
+      expect(events.first['pageName'], 'login');
+    });
+
+    testWidgets('push 两页 referrer 链正确，pop 返回补报前一页', (tester) async {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+      final observer = AnalyticsRouteObserver(tracker: tracker);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          navigatorObservers: [observer],
+          home: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => Navigator.of(context).push(
+                MaterialPageRoute<void>(
+                  settings: RouteSettings(
+                    name: AnalyticsPageName.login.pageName,
+                  ),
+                  builder: (loginContext) => ElevatedButton(
+                    onPressed: () => Navigator.of(loginContext).push(
+                      MaterialPageRoute<void>(
+                        settings: RouteSettings(
+                          name: AnalyticsPageName.register.pageName,
+                        ),
+                        builder: (registerContext) => ElevatedButton(
+                          onPressed: () => Navigator.of(registerContext).pop(),
+                          child: const Text('Back'),
+                        ),
+                      ),
+                    ),
+                    child: const Text('Next'),
+                  ),
+                ),
+              ),
+              child: const Text('Go'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('Go'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('Next'));
+      await tester.pumpAndSettle();
+
+      // push 两页：两条事件，referrer 链正确（06 §5.2 验收 5）。
+      expect(events.map((e) => e['pageName']), ['login', 'register']);
+      expect(events[0].containsKey('referrer'), isFalse);
+      expect(events[1]['referrer'], 'login');
+
+      // pop 返回：didPop 补报重新曝光的前一页，referrer 为弹出页。
+      await tester.tap(find.text('Back'));
+      await tester.pumpAndSettle();
+      expect(events, hasLength(3));
+      expect(events[2]['pageName'], 'login');
+      expect(events[2]['referrer'], 'register');
+    });
+
+    testWidgets('pop 回无名根路由经 resolveRootPage 补报', (tester) async {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+      final observer = AnalyticsRouteObserver(
+        tracker: tracker,
+        resolveRootPage: () => AnalyticsPageName.home,
+      );
+
+      await tester.pumpWidget(
+        MaterialApp(
+          navigatorObservers: [observer],
+          home: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => Navigator.of(context).push(
+                MaterialPageRoute<void>(
+                  settings: RouteSettings(
+                    name: AnalyticsPageName.profile.pageName,
+                  ),
+                  builder: (innerContext) => ElevatedButton(
+                    onPressed: () => Navigator.of(innerContext).pop(),
+                    child: const Text('Back'),
+                  ),
+                ),
+              ),
+              child: const Text('Go'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('Go'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('Back'));
+      await tester.pumpAndSettle();
+
+      expect(events.map((e) => e['pageName']), ['profile', 'home']);
+      expect(events[1]['referrer'], 'profile');
+    });
+
+    testWidgets('未在枚举的路由名不上报', (tester) async {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+      final observer = AnalyticsRouteObserver(tracker: tracker);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          navigatorObservers: [observer],
+          home: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => Navigator.of(context).push(
+                MaterialPageRoute<void>(
+                  settings: const RouteSettings(name: '/debug/unknown'),
+                  builder: (_) => const Placeholder(),
+                ),
+              ),
+              child: const Text('Go'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('Go'));
+      await tester.pumpAndSettle();
+
+      expect(events, isEmpty);
+    });
+
+    testWidgets('dialog 不上报（PopupRoute 不是 PageRoute）', (tester) async {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+      final observer = AnalyticsRouteObserver(tracker: tracker);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          navigatorObservers: [observer],
+          home: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => showDialog<void>(
+                context: context,
+                builder: (_) => const AlertDialog(title: Text('Dialog')),
+              ),
+              child: const Text('Show'),
+            ),
+          ),
+        ),
+      );
+      await tester.tap(find.text('Show'));
+      await tester.pumpAndSettle();
+
+      expect(events, isEmpty);
+    });
+  });
+
+  group('PageViewTracker', () {
+    test('连续相同页面去重（Tab 重复点选）', () {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+
+      tracker.report(AnalyticsPageName.home);
+      tracker.report(AnalyticsPageName.home);
+      tracker.report(AnalyticsPageName.profile);
+      tracker.report(AnalyticsPageName.home);
+
+      expect(events, hasLength(3));
+      expect(events.map((e) => e['pageName']), ['home', 'profile', 'home']);
+    });
+
+    test('referrer 链跨机制连贯（首页无 referrer）', () {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+
+      tracker.report(AnalyticsPageName.home);
+      tracker.report(AnalyticsPageName.login);
+      tracker.report(AnalyticsPageName.profile);
+
+      expect(events[0].containsKey('referrer'), isFalse);
+      expect(events[1]['referrer'], 'home');
+      expect(events[2]['referrer'], 'login');
+    });
+
+    test('reportTab 记录当前 Tab', () {
+      final events = <Map<String, dynamic>>[];
+      final tracker = PageViewTracker((name, [props]) async {
+        events.add({'event': name, ...?props});
+      });
+
+      tracker.reportTab(AnalyticsPageName.petArchive);
+      expect(tracker.currentTab, AnalyticsPageName.petArchive);
+      expect(events.single['pageName'], 'pet_archive');
+    });
+  });
+}

test/analytics/analytics_service_test.dart

@@ -2,59 +2,125 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:patbond_flutter/analytics/analytics_service.dart';
 
 void main() {
-  group('AnalyticsService', () {
-    test('tracks event with required fields', () async {
-      final service = AnalyticsService(
-        apiBaseUrl: 'http://test',
-        getAccessToken: null,
+  final uuidV7 = RegExp(
+    r'^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$',
   );
 
-      // Never throws, never awaits network (fire-and-forget).
-      expect(
-        () => service.trackEvent('auth_login_succeeded', {
+  AnalyticsService buildService({
+    String Function()? getSessionId,
+    String? anonymousId,
+  }) {
+    var counter = 0;
+    return AnalyticsService(
+      apiBaseUrl: 'http://test',
+      getAccessToken: null,
+      getSessionId: getSessionId ?? () => 'session-${counter++}',
+      anonymousId: anonymousId,
+    );
+  }
+
+  group('AnalyticsService', () {
+    test('tracks event with required fields', () async {
+      final service = buildService(getSessionId: () => 'session-a');
+
+      await service.trackEvent('auth_login_succeeded', {
         'identifierType': 'username',
         'durationMs': 123,
-        }),
-        returnsNormally,
-      );
+      });
+
+      final event = service.pendingEvents.single;
+      expect(event['eventName'], 'auth_login_succeeded');
+      expect(event['eventVersion'], 1);
+      expect(event['sessionId'], 'session-a');
+      expect(event['anonymousId'], isNotEmpty);
+      expect(event['clientTs'], isNotEmpty);
+      expect(event['appVersion'], isNotEmpty);
+      expect(event['osVersion'], isNotEmpty);
+      expect(event['props'], {'identifierType': 'username', 'durationMs': 123});
+    });
+
+    test('eventId 为 UUIDv7 且逐事件唯一', () async {
+      final service = buildService();
+
+      await service.trackEvent('auth_login_succeeded');
+      await service.trackEvent('auth_logout');
+
+      final ids = service.pendingEvents
+          .map((event) => event['eventId'] as String)
+          .toList();
+      expect(ids[0], matches(uuidV7));
+      expect(ids[1], matches(uuidV7));
+      expect(ids[0], isNot(ids[1]));
+    });
+
+    test('同一 tracker 下多事件 sessionId 相同，不再每事件生成', () async {
+      final service = buildService(getSessionId: () => 'tracker-session');
+
+      await service.trackEvent('auth_login_succeeded');
+      await service.trackEvent('page_viewed', {'pageName': 'home'});
+      await service.trackEvent('auth_logout');
+
+      final sessionIds = service.pendingEvents
+          .map((event) => event['sessionId'])
+          .toSet();
+      expect(sessionIds, {'tracker-session'});
+    });
+
+    test('appVersion 可注入更新（不再硬编码）', () async {
+      final service = buildService();
+
+      service.setAppVersion('2.3.4+56');
+      await service.trackEvent('auth_login_succeeded');
+
+      expect(service.pendingEvents.single['appVersion'], '2.3.4+56');
     });
 
     test('rejects events with forbidden field patterns', () async {
-      final service = AnalyticsService(
-        apiBaseUrl: 'http://test',
-        getAccessToken: null,
-      );
+      final service = buildService();
 
       // Forbidden field triggers local rejection (no throw, silent drop).
       await service.trackEvent('auth_login_succeeded', {
         'userPassword': 'leak', // Forbidden pattern
       });
 
-      // Event should be dropped (no assertion — just verify no crash).
+      expect(service.pendingEvents, isEmpty);
     });
 
-    test('identify sets userId', () {
-      final service = AnalyticsService(
-        apiBaseUrl: 'http://test',
-        getAccessToken: null,
-      );
+    test('identify sets userId on subsequent events', () async {
+      final service = buildService();
 
       service.identify('user-123');
+      await service.trackEvent('auth_login_succeeded');
 
-      // Subsequent events will carry userId (validated in integration tests).
+      expect(service.pendingEvents.single['userId'], 'user-123');
     });
 
-    test('reset clears userId but keeps anonymousId', () {
-      final service = AnalyticsService(
-        apiBaseUrl: 'http://test',
-        getAccessToken: null,
-        anonymousId: 'anon-123',
-      );
+    test('reset clears userId but keeps anonymousId', () async {
+      final service = buildService(anonymousId: 'anon-123');
 
       service.identify('user-123');
       service.reset();
+      await service.trackEvent('auth_logout');
 
-      // userId cleared, anonymousId retained (validated in integration tests).
+      final event = service.pendingEvents.single;
+      expect(event.containsKey('userId'), isFalse);
+      expect(event['anonymousId'], 'anon-123');
+    });
+
+    test('上传失败批次重回队列而非整批丢弃', () async {
+      // apiBaseUrl 指向不可达端口：满 20 条触发 flush 必然失败。
+      final service = AnalyticsService(
+        apiBaseUrl: 'http://127.0.0.1:1',
+        getAccessToken: null,
+        getSessionId: () => 's',
+      );
+
+      for (var i = 0; i < 20; i++) {
+        await service.trackEvent('auth_login_succeeded', {'attemptSeq': i});
+      }
+
+      // 第 20 条触发上传，失败后批次应重回队列（M0 行为是整批清空）。
+      expect(service.pendingEvents.length, 20);
     });
   });
 }

test/analytics/session_tracker_test.dart

@@ -0,0 +1,77 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:patbond_flutter/analytics/session_tracker.dart';
+
+void main() {
+  final uuidV7 = RegExp(
+    r'^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$',
+  );
+
+  group('SessionTracker', () {
+    test('冷启动生成 UUIDv7 格式的 sessionId', () {
+      final tracker = SessionTracker();
+      expect(tracker.sessionId, matches(uuidV7));
+    });
+
+    test('短后台（≤30 分钟）resume 后沿用原 sessionId', () {
+      var clock = DateTime.utc(2026, 9, 7, 10);
+      final tracker = SessionTracker(now: () => clock);
+      final original = tracker.sessionId;
+
+      tracker.didChangeAppLifecycleState(AppLifecycleState.paused);
+      clock = clock.add(const Duration(minutes: 30));
+      tracker.didChangeAppLifecycleState(AppLifecycleState.resumed);
+
+      expect(tracker.sessionId, original);
+    });
+
+    test('长后台（>30 分钟）resume 后生成新 sessionId', () {
+      var clock = DateTime.utc(2026, 9, 7, 10);
+      final tracker = SessionTracker(now: () => clock);
+      final original = tracker.sessionId;
+
+      tracker.didChangeAppLifecycleState(AppLifecycleState.paused);
+      clock = clock.add(const Duration(minutes: 31));
+      tracker.didChangeAppLifecycleState(AppLifecycleState.resumed);
+
+      expect(tracker.sessionId, isNot(original));
+      expect(tracker.sessionId, matches(uuidV7));
+    });
+
+    test('真实生命周期级联下退后台时刻不被 inactive 覆盖', () {
+      // 前台恢复时状态机级联 paused → hidden → inactive → resumed，
+      // 若 inactive 覆盖记时，31 分钟长后台会被误判为 0 分钟。
+      var clock = DateTime.utc(2026, 9, 7, 10);
+      final tracker = SessionTracker(now: () => clock);
+      final original = tracker.sessionId;
+
+      tracker.didChangeAppLifecycleState(AppLifecycleState.inactive);
+      tracker.didChangeAppLifecycleState(AppLifecycleState.hidden);
+      tracker.didChangeAppLifecycleState(AppLifecycleState.paused);
+      clock = clock.add(const Duration(minutes: 31));
+      tracker.didChangeAppLifecycleState(AppLifecycleState.hidden);
+      tracker.didChangeAppLifecycleState(AppLifecycleState.inactive);
+      tracker.didChangeAppLifecycleState(AppLifecycleState.resumed);
+
+      expect(tracker.sessionId, isNot(original));
+    });
+
+    test('连续多次短后台幂等，仅超阈值才换新', () {
+      var clock = DateTime.utc(2026, 9, 7, 10);
+      final tracker = SessionTracker(now: () => clock);
+      final original = tracker.sessionId;
+
+      for (var i = 0; i < 3; i++) {
+        tracker.didChangeAppLifecycleState(AppLifecycleState.paused);
+        clock = clock.add(const Duration(minutes: 10));
+        tracker.didChangeAppLifecycleState(AppLifecycleState.resumed);
+        expect(tracker.sessionId, original);
+      }
+
+      tracker.didChangeAppLifecycleState(AppLifecycleState.paused);
+      clock = clock.add(const Duration(minutes: 35));
+      tracker.didChangeAppLifecycleState(AppLifecycleState.resumed);
+      expect(tracker.sessionId, isNot(original));
+    });
+  });
+}