docs(recent-calls): 架构文档补充（#42~#44）
新增 Doc/recent_calls_architecture.md： - 功能范围、目录结构、数据流图 - API 端点 /app/api/call/records 字段映射表 - 通话状态枚举（0-6）与未接来电判断逻辑 - ViewModel 设计、UI 结构、路由说明 - 设计决策（无用户名映射、全量拉取、离线可用） Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Doc/recent_calls_architecture.md
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# 最近呼叫（Recent Calls）— 架构文档
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> 对应 Gitea issues #46-#48（内部编号 #42-#44）
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> 参考实现：`im-client-im-dev` lib/views/call_log/ + lib/managers/call_log_mgr.dart
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---
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## 1. 功能范围
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| Issue | 功能 | 状态 |
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|-------|------|------|
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| #42 | 最近呼叫列表页 UI（全部/未接 Tab + CallLogTile） | ✅ 已实现 |
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| #43 | 通话记录 API 接入（FetchCallLogsRequest + UseCase） | ✅ 已实现 |
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| #44 | RecentCallsViewModel + 路由接入 | ✅ 已实现 |
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---
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## 2. 目录结构
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```
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features/settings/
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├── di/
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│ └── settings_providers.dart # 新增 fetchCallLogsUseCaseProvider
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├── presentation/
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│ └── recent_calls_view_model.dart # RecentCallsViewModel + RecentCallsState
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├── usecases/
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│ └── fetch_call_logs_usecase.dart # POST /app/api/call/records → DB
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└── view/
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└── recent_calls_page.dart # RecentCallsPage + TabBar + _CallLogTile
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data/remote/
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└── call_log_request.dart # FetchCallLogsRequest + CallLogDto
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app/router/
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├── app_route_name.dart # 新增 settingsRecentCalls
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├── app_router.dart # 新增 GoRoute
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└── guards/auth_guard.dart # 新增 case settingsRecentCalls
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```
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---
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## 3. 数据流
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```
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RecentCallsPage (build)
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└─ ref.watch(allCallLogsProvider) ← DB Stream（实时）
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└─ RecentCallsViewModel.loadCallLogs()
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└─ FetchCallLogsUseCase.execute()
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└─ POST /app/api/call/records (start_from=0, status=-1)
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├─ 响应 List<CallLogDto> → CallLog Domain
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└─ CallLogRepository.insertOrReplaceCallLogs()
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└─ Drift DB → allCallLogsProvider 自动刷新 → UI
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进入页面：
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└─ RecentCallsViewModel.markAllRead()
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└─ CallLogRepository.markAllAsRead()
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```
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---
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## 4. API 端点
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| 操作 | Method | Path | 参数 |
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|------|--------|------|------|
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| 拉取通话记录 | POST | `/app/api/call/records` | `start_from` (int, 时间戳), `status` (-1=全部) |
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### 响应字段映射
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| 服务端字段 | Dart 字段 | 类型 |
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|-----------|-----------|------|
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| `rtc_channel_id` | `id` (String) | String |
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| `inviter_id` / `caller_id` | `callerId` | int? |
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| `receiver_id` | `receiverId` | int? |
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| `chat_id` | `chatId` | int? |
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| `duration` | `duration` | int? (秒) |
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| `video_call` | `videoCall` | int? (0=语音, 1=视频) |
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| `created_at` | `createdAt` | int? (秒级时间戳) |
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| `updated_at` | `updatedAt` | int? |
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| `ended_at` | `endedAt` | int? |
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| `status` | `status` | int? |
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| `is_read` | `isRead` | int? (0/1) |
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---
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## 5. 通话状态枚举
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```dart
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// status 值含义（参考 im-client-im-dev CallEvent）
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// 0 = Ringing/Pending
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// 1 = Connected
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// 2 = Ended（正常结束）
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// 3 = Busy（CallOptBusy）
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// 4 = Cancelled（CallOptCancel）
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// 5 = Timeout（CallTimeOut）
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// 6 = Declined（CallBusy）
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// 未接来电：callerId != currentUid AND status in {3, 4, 5, 6}
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```
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---
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## 6. ViewModel 设计
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```dart
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class RecentCallsState {
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final int tabIndex; // 0=全部, 1=未接来电
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final bool isLoading;
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final String? error;
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}
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class RecentCallsViewModel extends Notifier<RecentCallsState> {
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void setTab(int index) // 切换 Tab
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Future<void> loadCallLogs() // 拉取 + 写入 DB
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Future<void> markAllRead() // 标记已读
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}
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```
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---
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## 7. UI 结构
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### RecentCallsPage
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```
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Scaffold
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AppBar: 「最近呼叫」
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Column
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TabBar（全部 / 未接来电）
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Expanded
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TabBarView
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AllCallsTab → allCallLogsProvider 全部
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MissedTab → 按 isMissed 过滤
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```
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### _CallLogTile
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```
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ListTile
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leading: _CallTypeIcon（电话/摄像头/红色, 40pt 圆形）
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title: 对方 UID 显示（"@J{uid}"）
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subtitle: 通话类型文字 + 时长
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trailing: 相对时间
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```
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**未接来电判断**：`callerId != currentUid` AND `status in {3,4,5,6}`
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---
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## 8. 路由
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```
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/settings/recent-calls → RecentCallsPage（parentNavigatorKey=_rootKey）
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```
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`auth_guard.dart` switch 已补充 `settingsRecentCalls` case。
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---
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## 9. 设计决策
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- **无用户名映射**：当前 CallLog 实体只有 UID，无昵称。显示 `@J{uid}` 占位，
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后续可接入联系人 Repository 做名称查询。
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- **增量拉取策略**：当前实现 `start_from=0`（全量），首次打开可能慢；
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后续可从本地最新 `updatedAt` 做增量同步（参考 CallLogMgr.loadRemoteCallLog）。
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- **离线可用**：数据先写 DB，UI 监听 `allCallLogsProvider`（DB Stream），
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无网络时仍能展示缓存记录。
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