fix: 用药模块重做 + 运动计划不限7天 + 打卡可切换 + 删除修复

- 用药: 重写列表页(标签筛选+详情弹窗+打卡切换+滑动删除)
- 用药: 重写编辑页(选择器替代输入+同列布局+频率改为每天几次)
- 用药: 加Notes字段+DELETE端点+修复重复端点
- 运动: 不限7天, startDate+索引推算当天
- 打卡: 药/运动打卡可切换(点✓取消)
- 删除: 修复滑动删除热区, 一次点击即删除
- 侧边栏: 一键清理历史对话
- 饮食/运动/用药/问诊 API路径加/api/前缀
- 通知时机修正: 新建计划不再提前弹窗

health_app/lib/widgets/health_drawer.dart

@@ -187,8 +187,14 @@ class HealthDrawer extends ConsumerWidget {
                       ),
                       const Spacer(),
                       GestureDetector(
-                        onTap: () => ref.invalidate(conversationListProvider),
-                        child: const Padding(padding: EdgeInsets.all(4), child: Icon(Icons.refresh, size: 15, color: Color(0xFFAAAAAA))),
+                        onTap: () async {
+                          final api = ref.read(apiClientProvider);
+                          for (final c in conversations.value ?? []) {
+                            try { await api.delete('/api/ai/conversations/${c.id}'); } catch (_) {}
+                          }
+                          ref.invalidate(conversationListProvider);
+                        },
+                        child: const Padding(padding: EdgeInsets.all(4), child: Text('清理', style: TextStyle(fontSize: 11, color: Color(0xFFAAAAAA)))),
                       ),
                     ]),
                   ),
@@ -268,7 +274,13 @@ class HealthDrawer extends ConsumerWidget {
               item: item,
               onTap: () {
                 ref.read(chatProvider.notifier).loadConversation(item.id);
-                Navigator.of(context).pop(); // 关闭抽屉
+                Navigator.of(context).pop();
+              },
+              onDelete: () async {
+                try {
+                  await ref.read(apiClientProvider).delete('/api/ai/conversations/${item.id}');
+                  ref.invalidate(conversationListProvider);
+                } catch (_) {}
               },
             )).toList(),
           ),
@@ -424,8 +436,9 @@ class _FeatureChip extends StatelessWidget {
 class _ConversationItem extends StatelessWidget {
   final ConversationItem item;
   final VoidCallback? onTap;
+  final VoidCallback? onDelete;
 
-  const _ConversationItem({required this.item, this.onTap});
+  const _ConversationItem({required this.item, this.onTap, this.onDelete});
 
   @override
   Widget build(BuildContext context) {
@@ -449,14 +462,12 @@ class _ConversationItem extends StatelessWidget {
         ),
         title: Text(item.title, maxLines: 1, overflow: TextOverflow.ellipsis, style: const TextStyle(fontSize: 13, fontWeight: FontWeight.w600, color: Color(0xFF333333))),
         subtitle: Text(item.lastMessage, maxLines: 1, overflow: TextOverflow.ellipsis, style: TextStyle(fontSize: 11, color: Colors.grey[500])),
-        trailing: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            Text(_formatTime(item.updatedAt), style: TextStyle(fontSize: 9, color: Colors.grey[400])),
-            const SizedBox(height: 2),
-            Icon(Icons.chevron_right, size: 12, color: Colors.grey[300]),
-          ],
+        trailing: GestureDetector(
+          onTap: onDelete,
+          child: const Padding(
+            padding: EdgeInsets.all(8),
+            child: Icon(Icons.close, size: 16, color: Color(0xFFBBBBBB)),
+          ),
         ),
         dense: true,
         visualDensity: VisualDensity.compact,