fix: 修复 Flutter 前端多项功能 + 后端运动计划 API

- Android 添加相机/存储权限，拍照和相册功能可用
- AI 回复支持 Markdown 渲染（加粗/表格不再显示**乱码）
- 附件按钮接线，支持拍照/相册/文件选择
- 智能体面板按钮全部接线（拍照/上传/手动录入/导航）
- 侧边栏 AI 录入后自动刷新健康数据
- 运动计划页增加创建按钮 + 打卡功能
- 后端运动计划支持 AI 创建和打卡（Tool Calling）
- 修复 CreateExercisePlanRequest JSON 反序列化

health_app/lib/pages/remaining_pages.dart

@@ -46,9 +46,14 @@ class ExercisePlanPage extends ConsumerWidget {
     final plan = ref.watch(currentExercisePlanProvider);
     return Scaffold(
       appBar: AppBar(title: const Text('运动计划')),
+      floatingActionButton: FloatingActionButton.extended(
+        onPressed: () => _createDefaultPlan(ref),
+        icon: const Icon(Icons.add),
+        label: const Text('创建本周计划'),
+      ),
       body: plan.when(
         data: (data) {
-          if (data == null) return _empty(context, '运动计划', '暂无运动计划');
+          if (data == null || data.isEmpty) return _empty(context, '运动计划', '暂无运动计划，点击右下角创建');
           final items = (data['items'] as List?)?.cast<Map<String, dynamic>>() ?? [];
           final weekDays = ['周一', '周二', '周三', '周四', '周五', '周六', '周日'];
           return ListView.builder(
@@ -61,16 +66,39 @@ class ExercisePlanPage extends ConsumerWidget {
               return ListTile(
                 leading: Icon(isDone ? Icons.check_circle : Icons.circle_outlined, color: isDone ? const Color(0xFF43A047) : Colors.grey),
                 title: Text('${weekDays[day]}  ${isRest ? '休息日' : '${item['exerciseType']} ${item['durationMinutes']}分钟'}'),
-                trailing: isDone ? const Text('✅ 已完成', style: TextStyle(fontSize: 14, color: Color(0xFF43A047))) : const Text('待完成', style: TextStyle(fontSize: 14, color: Color(0xFF999999))),
+                trailing: isDone ? null : IconButton(icon: const Icon(Icons.check, color: Color(0xFF43A047)), onPressed: () { _checkIn(ref, item['id']); }),
               );
             },
           );
         },
         loading: () => const Center(child: CircularProgressIndicator()),
-        error: (_, _) => _empty(context, '运动计划', '暂无运动计划'),
+        error: (_, __) => _empty(context, '运动计划', '暂无运动计划，点击右下角创建'),
       ),
     );
   }
+
+  void _createDefaultPlan(WidgetRef ref) async {
+    final service = ref.read(exerciseServiceProvider);
+    final today = DateTime.now();
+    final monday = today.subtract(Duration(days: today.weekday - 1));
+    final items = List.generate(7, (i) => {
+      'dayOfWeek': i,
+      'exerciseType': i == 2 || i == 5 ? '休息' : '散步',
+      'durationMinutes': i == 2 || i == 5 ? 0 : 30,
+      'isRestDay': i == 2 || i == 5,
+    });
+    await service.createPlan({
+      'weekStartDate': '${monday.year}-${monday.month.toString().padLeft(2, '0')}-${monday.day.toString().padLeft(2, '0')}',
+      'items': items,
+    });
+    ref.invalidate(currentExercisePlanProvider);
+  }
+
+  void _checkIn(WidgetRef ref, String itemId) async {
+    final service = ref.read(exerciseServiceProvider);
+    await service.checkIn(itemId);
+    ref.invalidate(currentExercisePlanProvider);
+  }
 }
 
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