feat: UI全面改造 + 后端多项修复

【后端修复】
- 删除diet/consultation agent假工具声明
- 修复DayOfWeek实体注释
- 修复Vision API content序列化
- cleanup_service级联删除修复
- 用药提醒时区偏差修复
- 统一DateTime处理(UtcNow+8)
- 新增UTC DateTime JSON转换器

【前端UI重构】
- 配色体系全面更新(#8B5CF6淡紫+#F0ECFF背景)
- 登录页重设计
- 首页重设计(透明顶栏、渐变背景、胶囊输入区)
- 聊天卡片加白蓝边框、渐变标题
- 侧边栏重构(渐变背景、合并顶部、删除底部设置)
- 确认卡片可编辑字段恢复
- 所有子页面加返回按钮
- catch异常加日志
- 删除后refresh provider缓存

health_app/lib/pages/home/widgets/chat_messages_view.dart

@@ -110,14 +110,15 @@ class ChatMessagesView extends ConsumerWidget {
         constraints: BoxConstraints(maxWidth: screenWidth * 0.95),
         decoration: BoxDecoration(
           color: AppColors.cardBackground,
-          borderRadius: BorderRadius.circular(24),
+          borderRadius: BorderRadius.circular(16),
+          border: Border.all(color: Color(0xFFE2E8F0), width: 2),
           boxShadow: AppColors.cardShadow,
         ),
         clipBehavior: Clip.antiAlias,
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            // ── 标题区域（清爽蓝紫渐变背景） ──
+            // ── 标题区域 ──
             Container(
               width: double.infinity,
               padding: const EdgeInsets.fromLTRB(20, 22, 20, 20),
@@ -247,6 +248,15 @@ class ChatMessagesView extends ConsumerWidget {
               ),
             ],
 
+            // ── 医生选择区（问诊专用）──
+            if (agent == ActiveAgent.consultation) ...[
+              const SizedBox(height: 14),
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 20),
+                child: _buildDoctorCards(ref),
+              ),
+            ],
+
             // ── 快捷操作按钮区 ──
             if (actions.isNotEmpty) ...[
               const SizedBox(height: 14),
@@ -550,14 +560,15 @@ class ChatMessagesView extends ConsumerWidget {
         constraints: BoxConstraints(maxWidth: screenWidth * 0.95),
         decoration: BoxDecoration(
           color: AppColors.cardBackground,
-          borderRadius: BorderRadius.circular(24),
+          borderRadius: BorderRadius.circular(16),
+          border: Border.all(color: Color(0xFFE2E8F0), width: 2),
           boxShadow: AppColors.cardShadow,
         ),
         clipBehavior: Clip.antiAlias,
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            // ── 标题区域（清爽蓝紫渐变背景） ──
+            // ── 标题区域 ──
             Container(
               width: double.infinity,
               padding: const EdgeInsets.fromLTRB(20, 20, 20, 18),
@@ -758,10 +769,7 @@ class ChatMessagesView extends ConsumerWidget {
                         color: Colors.transparent,
                         child: InkWell(
                           onTap: () {
-                            msg.confirmed = true;
-                            if (isMedication) ref.invalidate(medicationListProvider);
-                            if (isHealth) ref.invalidate(latestHealthProvider);
-                            ref.read(chatProvider.notifier).markNeedsRebuild();
+                            ref.read(chatProvider.notifier).confirmMessage(msg.id);
                           },
                           borderRadius: BorderRadius.circular(16),
                           child: Row(
@@ -816,8 +824,7 @@ class ChatMessagesView extends ConsumerWidget {
                 else
                   InkWell(
                     onTap: () {
-                      msg.metadata?['_editingField'] = field.label;
-                      ref.read(chatProvider.notifier).markNeedsRebuild();
+                      ref.read(chatProvider.notifier).startEditingField(msg.id, field.label);
                     },
                     child: Row(
                       children: [
@@ -854,14 +861,10 @@ class ChatMessagesView extends ConsumerWidget {
               border: InputBorder.none,
             ),
             onSubmitted: (value) {
-              msg.metadata?[field.label] = value;
-              msg.metadata?['_editingField'] = null;
-              ref.read(chatProvider.notifier).markNeedsRebuild();
+              ref.read(chatProvider.notifier).finishEditingField(msg.id, field.label, value);
             },
             onTapOutside: (_) {
-              msg.metadata?[field.label] = controller.text;
-              msg.metadata?['_editingField'] = null;
-              ref.read(chatProvider.notifier).markNeedsRebuild();
+              ref.read(chatProvider.notifier).finishEditingField(msg.id, field.label, controller.text);
             },
           ),
         );
@@ -1057,6 +1060,7 @@ class ChatMessagesView extends ConsumerWidget {
         .replaceAll(RegExp(r'^[\-\*]\s+', multiLine: true), '')
         .replaceAll(RegExp(r'`(.+?)`'), r'$1')
         .replaceAll(RegExp(r'\[([^\]]+)\]\([^)]+\)'), r'$1')
+        .replaceAll('\$1', '')  // AI 偶尔输出 $1 占位符
         .replaceAll(RegExp(r'\n{3,}'), '\n\n')
         .trim();
   }
@@ -1328,20 +1332,35 @@ class ChatMessagesView extends ConsumerWidget {
 
     return Container(
       margin: const EdgeInsets.only(bottom: 12),
-      padding: const EdgeInsets.all(14),
       decoration: BoxDecoration(
         color: Colors.white,
         borderRadius: BorderRadius.circular(16),
-        boxShadow: [BoxShadow(color: AppTheme.primary.withAlpha(10), blurRadius: 8, offset: const Offset(0, 2))],
+        border: Border.all(color: Color(0xFFE2E8F0), width: 2),
+        boxShadow: AppColors.cardShadow,
       ),
+      clipBehavior: Clip.antiAlias,
       child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-        Row(children: [
-          Icon(Icons.today, size: 21, color: AppTheme.primary),
-          const SizedBox(width: 8),
-          const Text('今日任务', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: AppColors.textPrimary)),
-        ]),
-        const SizedBox(height: 10),
-        ...tasks,
+        Container(
+          width: double.infinity, padding: const EdgeInsets.fromLTRB(16, 12, 16, 10),
+          decoration: const BoxDecoration(gradient: LinearGradient(colors: [Color(0xFFF0ECFF), Color(0xFFEBF4FF)])),
+          child: Row(children: [
+            Container(width: 28, height: 28, decoration: BoxDecoration(color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.circular(8)),
+              child: const Icon(Icons.health_and_safety, size: 16, color: AppColors.primary)),
+            const SizedBox(width: 8),
+            const Text('今日健康', style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600, color: AppColors.textPrimary)),
+            const Spacer(),
+            Text('${now.month}月${now.day}日', style: const TextStyle(fontSize: 13, color: AppColors.textSecondary)),
+          ]),
+        ),
+        Padding(
+          padding: const EdgeInsets.all(14),
+          child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
+            if (tasks.isEmpty)
+              _taskRow(context, Icons.check_circle, '今日暂无待办', status: 'done')
+            else
+              ...tasks,
+          ]),
+        ),
       ]),
     );
   }