feat: 通知推送/免打扰偏好 + 饮食记录侧滑删除修复 + 聊天交互优化

- 通知: 新增推送开关/免打扰时段偏好持久化 + EF 迁移; 通知管线支持免打扰过滤
- 饮食: 侧滑删除 confirmDismiss 按方向放行(修复删不掉); 新增 diet_nutrition_widgets; 饮食录入页重构
- 聊天: 智能体胶囊点击锁防误触; 流式状态 select 优化; 卡片入场动画
- 主页: 消息列表提取 _HomeMessages + 侧滑手势打开抽屉
- 其他: api_client IP 适配; 通知/用药/饮食端点微调; 测试更新

health_app/lib/providers/chat_provider.dart

@@ -76,13 +76,13 @@ class ChatNotifier extends Notifier<ChatState> {
   StreamSubscription<Map<String, dynamic>>? _subscription;
   Completer<void>? _streamDone;
   ActiveAgent? _lastTriggeredAgent;
-  Timer? _agentWelcomeTimer;
-  String? _pendingAgentTriggerMessageId;
+  Timer? _agentTapLockTimer;
 
   /// 重置整个会话：取消正在进行的 SSE，清空消息和会话 ID。
   /// 历史记录页一键清空 / 删除当前会话时调用。
   Future<void> resetSession() async {
     await _cancelActiveStream();
+    _cancelPendingAgentWelcome();
     _lastTriggeredAgent = null;
     state = const ChatState();
   }
@@ -133,7 +133,7 @@ class ChatNotifier extends Notifier<ChatState> {
   ChatState build() {
     ref.onDispose(() {
       _subscription?.cancel();
-      _agentWelcomeTimer?.cancel();
+      _agentTapLockTimer?.cancel();
       _subscription = null;
       if (_streamDone != null && !_streamDone!.isCompleted) {
         _streamDone!.complete();
@@ -229,61 +229,41 @@ class ChatNotifier extends Notifier<ChatState> {
     }
   }
 
-  void insertAgentWelcome(ActiveAgent agent) {
-    _pendingAgentTriggerMessageId = null;
-    state = state.copyWith(
-      messages: [
-        ...state.messages,
-        ChatMessage(
-          id: 'welcome_${agent.name}_${DateTime.now().millisecondsSinceEpoch}',
-          role: 'assistant',
-          content: '',
-          createdAt: DateTime.now(),
-          type: MessageType.agentWelcome,
-          metadata: {'agent': agent.name},
-        ),
-      ],
-    );
-  }
-
-  /// 点击胶囊：先出用户标签 → 0.4 秒后出欢迎卡片，不走 AI
+  /// 点击胶囊：用户标签和欢迎卡片立即出现，不走 AI。
+  /// 300ms 点击锁只防止误触，不延迟界面反馈。
   /// 重复点击同一胶囊不重复弹卡片
   void triggerAgent(ActiveAgent agent, String label) {
-    if (_pendingAgentTriggerMessageId != null) {
-      return;
-    }
-    if (_lastTriggeredAgent == agent && _pendingAgentTriggerMessageId == null) {
-      return;
-    }
+    if (_agentTapLockTimer != null || _lastTriggeredAgent == agent) return;
     _lastTriggeredAgent = agent;
 
+    final now = DateTime.now();
     final userMsg = ChatMessage(
-      id: 'agent_trigger_${DateTime.now().millisecondsSinceEpoch}',
+      id: 'agent_trigger_${now.microsecondsSinceEpoch}',
       role: 'user',
       content: label,
-      createdAt: DateTime.now(),
+      createdAt: now,
+    );
+    final welcomeMsg = ChatMessage(
+      id: 'welcome_${agent.name}_${now.microsecondsSinceEpoch}',
+      role: 'assistant',
+      content: '',
+      createdAt: now,
+      type: MessageType.agentWelcome,
+      metadata: {'agent': agent.name},
+    );
+    state = state.copyWith(
+      messages: [...state.messages, userMsg, welcomeMsg],
+      activeAgent: agent,
     );
-    final messages = state.messages.toList();
-    messages.add(userMsg);
-    _pendingAgentTriggerMessageId = userMsg.id;
-    state = state.copyWith(messages: messages, activeAgent: agent);
-    final expectedConversationId = state.conversationId;
 
-    _agentWelcomeTimer = Timer(Duration.zero, () {
-      if (state.conversationId != expectedConversationId ||
-          state.activeAgent != agent ||
-          _lastTriggeredAgent != agent) {
-        return;
-      }
-      _agentWelcomeTimer = null;
-      insertAgentWelcome(agent);
+    _agentTapLockTimer = Timer(const Duration(milliseconds: 300), () {
+      _agentTapLockTimer = null;
     });
   }
 
   void _cancelPendingAgentWelcome() {
-    _agentWelcomeTimer?.cancel();
-    _agentWelcomeTimer = null;
-    _pendingAgentTriggerMessageId = null;
+    _agentTapLockTimer?.cancel();
+    _agentTapLockTimer = null;
   }
 
   Future<void> sendImage(String imagePath, String text) async {