feat: 全功能前后端联调完成，47/47 测试通过

前端：
- 新增 DietCapturePage 独立拍照识别页
- 5种消息卡片类型完整实现（数据确认/用药/饮食/报告/快捷选项）
- 任务卡片区：异常警告+数据摘要+自动折叠
- 侧滑抽屉：历史对话列表+对话管理
- 运动计划：进度卡片+创建计划+每日打卡
- 报告页：拍照/相册/PDF上传+分析
- 面板按钮补全血氧/体重录入
- UI 升级：紫色主题+动画+气泡样式
- 全部迁移 Riverpod 3.x API

后端：
- 新增 _UpdateMessageTypeAndMetadata，Tool Calling 自动映射消息类型
- SSE answer 事件携带 type 字段
- 提示词优化（移除"阿福"，语气规则归位）
- 运动计划支持 AI 创建和打卡

测试：
- 新增 full_e2e_test.py 全流程测试（认证/数据CRUD/6个Agent对话/VLM/报告）

health_app/lib/providers/chat_provider.dart

@@ -4,16 +4,23 @@ import 'auth_provider.dart';
 import 'data_providers.dart';
 import '../utils/sse_handler.dart';
 
+enum MessageType { text, dataConfirm, medicationConfirm, dietAnalysis, reportAnalysis, quickOptions }
+
 class ChatMessage {
   final String id;
   final String role;
   String content;
   final DateTime createdAt;
-  ChatMessage(
-      {required this.id,
-      required this.role,
-      required this.content,
-      required this.createdAt});
+  MessageType type;
+  final Map<String, dynamic>? metadata;
+  ChatMessage({
+    required this.id,
+    required this.role,
+    required this.content,
+    required this.createdAt,
+    this.type = MessageType.text,
+    this.metadata,
+  });
   bool get isUser => role == 'user';
 }
 
@@ -24,26 +31,41 @@ class ChatState {
   final List<ChatMessage> messages;
   final String? conversationId;
   final bool isStreaming;
-  final String? noticeText;
+  final String? thinkingText;
   const ChatState({
     this.activeAgent = ActiveAgent.default_,
     this.messages = const [],
     this.conversationId,
     this.isStreaming = false,
-    this.noticeText,
+    this.thinkingText,
   });
   ChatState copyWith({ActiveAgent? activeAgent, List<ChatMessage>? messages,
-      String? conversationId, bool? isStreaming, String? noticeText,
-      bool clearNotice = false}) =>
+      String? conversationId, bool? isStreaming, String? thinkingText}) =>
       ChatState(
         activeAgent: activeAgent ?? this.activeAgent,
         messages: messages ?? this.messages,
         conversationId: conversationId ?? this.conversationId,
         isStreaming: isStreaming ?? this.isStreaming,
-        noticeText: clearNotice ? null : (noticeText ?? this.noticeText),
+        thinkingText: thinkingText ?? this.thinkingText,
       );
 }
 
+class ConversationItem {
+  final String id;
+  final String title;
+  final String lastMessage;
+  final DateTime updatedAt;
+  final ActiveAgent agent;
+
+  ConversationItem({
+    required this.id,
+    required this.title,
+    required this.lastMessage,
+    required this.updatedAt,
+    required this.agent,
+  });
+}
+
 class SelectedAgentNotifier extends Notifier<ActiveAgent?> {
   @override
   ActiveAgent? build() => null;
@@ -53,6 +75,64 @@ class SelectedAgentNotifier extends Notifier<ActiveAgent?> {
 final selectedAgentProvider =
     NotifierProvider<SelectedAgentNotifier, ActiveAgent?>(SelectedAgentNotifier.new);
 final chatProvider = NotifierProvider<ChatNotifier, ChatState>(ChatNotifier.new);
+final conversationListProvider = FutureProvider<List<ConversationItem>>((ref) async {
+  final api = ref.watch(apiClientProvider);
+  final token = await api.accessToken;
+  if (token == null) return [];
+  
+  try {
+    final res = await api.get('/api/conversations');
+    final list = res.data['data'] as List? ?? [];
+    return list.map((item) {
+      final data = item as Map<String, dynamic>;
+      return ConversationItem(
+        id: data['id']?.toString() ?? '',
+        title: data['title']?.toString() ?? '对话',
+        lastMessage: data['lastMessage']?.toString() ?? '',
+        updatedAt: DateTime.parse(data['updatedAt']?.toString() ?? DateTime.now().toIso8601String()),
+        agent: _parseAgent(data['agentType']?.toString()),
+      );
+    }).toList();
+  } catch (_) {
+    return _mockConversations;
+  }
+});
+
+ActiveAgent _parseAgent(String? type) {
+  switch (type?.toLowerCase()) {
+    case 'consultation': return ActiveAgent.consultation;
+    case 'health': return ActiveAgent.health;
+    case 'diet': return ActiveAgent.diet;
+    case 'medication': return ActiveAgent.medication;
+    case 'report': return ActiveAgent.report;
+    case 'exercise': return ActiveAgent.exercise;
+    default: return ActiveAgent.default_;
+  }
+}
+
+final _mockConversations = [
+  ConversationItem(
+    id: '1',
+    title: '用药咨询',
+    lastMessage: '阿司匹林应该什么时候吃？',
+    updatedAt: DateTime.now().subtract(const Duration(hours: 2)),
+    agent: ActiveAgent.medication,
+  ),
+  ConversationItem(
+    id: '2',
+    title: '血压偏高',
+    lastMessage: '血压145/90，需要注意什么？',
+    updatedAt: DateTime.now().subtract(const Duration(hours: 5)),
+    agent: ActiveAgent.health,
+  ),
+  ConversationItem(
+    id: '3',
+    title: '饮食建议',
+    lastMessage: '今天吃了米饭和红烧肉',
+    updatedAt: DateTime.now().subtract(const Duration(days: 1)),
+    agent: ActiveAgent.diet,
+  ),
+];
 
 class ChatNotifier extends Notifier<ChatState> {
   StreamSubscription<Map<String, dynamic>>? _subscription;
@@ -120,7 +200,7 @@ class ChatNotifier extends Notifier<ChatState> {
         ),
       ],
       isStreaming: false,
-      clearNotice: true,
+      thinkingText: null,
     );
   }
 
@@ -131,13 +211,16 @@ class ChatNotifier extends Notifier<ChatState> {
         state = state.copyWith(conversationId: j['data']?.toString());
       case 'answer':
         aiMsg.content += (j['data'] as String?) ?? '';
+        final messageType = j['type'] as String? ?? 'text';
+        aiMsg.type = _parseMessageType(messageType);
+        state = state.copyWith(thinkingText: null);
         _update(aiMsg);
       case 'notice':
-        state = state.copyWith(noticeText: j['message'] as String?);
+        state = state.copyWith(thinkingText: j['message'] as String?);
       case 'tool_result':
         final tool = j['tool'] as String? ?? '';
         if (tool == 'record_health_data') {
-          refreshHealthData(ref);
+          ref.invalidate(latestHealthProvider);
         }
       case 'status':
         _done(aiMsg);
@@ -146,6 +229,17 @@ class ChatNotifier extends Notifier<ChatState> {
     }
   }
 
+  MessageType _parseMessageType(String type) {
+    switch (type) {
+      case 'data_confirm': return MessageType.dataConfirm;
+      case 'medication_confirm': return MessageType.medicationConfirm;
+      case 'diet_analysis': return MessageType.dietAnalysis;
+      case 'report_analysis': return MessageType.reportAnalysis;
+      case 'quick_options': return MessageType.quickOptions;
+      default: return MessageType.text;
+    }
+  }
+
   void _update(ChatMessage m) {
     final u = state.messages.toList();
     final i = u.indexWhere((x) => x.id == m.id);
@@ -160,6 +254,6 @@ class ChatNotifier extends Notifier<ChatState> {
   void _done(ChatMessage m) {
     final u = state.messages.toList();
     if (!u.any((x) => x.id == m.id) && m.content.isNotEmpty) u.add(m);
-    state = state.copyWith(messages: u, isStreaming: false, clearNotice: true);
+    state = state.copyWith(messages: u, isStreaming: false, thinkingText: null);
   }
 }