refactor: 死代码清理 + 趋势图重构 + 侧边栏交互优化 + 智能体卡片去延迟

- 死代码清理: 删除 AppCard/AppMenuItem/AppTabChip/AppButtons 等 4 个未使用 Widget 文件; 清理 common_widgets/enterprise_widgets/app_status_badge 中未使用 class; 移除 HealthService 等未使用方法; 后端移除 ExerciseService.CreateFromItemsAsync/HealthArchiveService.GetOrCreateAsync/MedicationAgentHandler 死分支/ChatRequest DTO
- 趋势图: 直线折线 + 渐变填充 + 阴影; 去网格; X 轴日+月份; Y 轴整数刻度最多 4 个; 点击数据点/录入记录显示上方浮层; 选中点变实心
- 侧边栏: 对话记录改单选删除(灰底高亮); 操作栏浮层修复触摸问题; 常用功能/健康仪表盘间距收紧; _Panel 去外框
- 智能体: 欢迎卡片去掉 400ms 延迟; 胶囊去阴影
- 其他: api_client IP 适配; 多页面 UI 微调; 新增 chat_provider/prelaunch_guardrails 测试

health_app/lib/pages/home/home_page.dart

@@ -78,7 +78,7 @@ class _HomePageState extends ConsumerState<HomePage>
     final imagePath = _pickedImagePath;
     if (text.isEmpty && imagePath == null) return;
     _textCtrl.clear();
-    _focusNode.unfocus();
+    _dismissKeyboard();
     setState(() => _pickedImagePath = null);
     if (imagePath != null) {
       ref.read(chatProvider.notifier).sendImage(imagePath, text);
@@ -145,9 +145,9 @@ class _HomePageState extends ConsumerState<HomePage>
                     left: 0,
                     top: 0,
                     bottom: 0,
-                    width: 44,
+                    width: MediaQuery.sizeOf(context).width * 0.8,
                     child: GestureDetector(
-                      behavior: HitTestBehavior.opaque,
+                      behavior: HitTestBehavior.translucent,
                       onHorizontalDragStart: (details) {
                         _drawerDragStartX = details.globalPosition.dx;
                       },
@@ -255,16 +255,20 @@ class _HomePageState extends ConsumerState<HomePage>
   ];
 
   Widget _buildAgentBar() {
+    final activeAgent = ref.watch(
+      chatProvider.select((state) => state.activeAgent),
+    );
     return SizedBox(
-      height: 42,
+      height: 46,
       child: ListView.separated(
         scrollDirection: Axis.horizontal,
-        padding: const EdgeInsets.symmetric(horizontal: 14),
+        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 2),
         itemCount: _agentDefs.length,
         separatorBuilder: (_, _) => const SizedBox(width: 8),
         itemBuilder: (_, i) {
           final agent = _agentDefs[i];
           final visual = _agentVisual(agent);
+          final selected = activeAgent == agent;
           return GestureDetector(
             onTap: () => ref
                 .read(chatProvider.notifier)
@@ -272,9 +276,14 @@ class _HomePageState extends ConsumerState<HomePage>
             child: Container(
               padding: const EdgeInsets.symmetric(horizontal: 13, vertical: 9),
               decoration: BoxDecoration(
-                color: Colors.white.withValues(alpha: 0.86),
+                color: Colors.white,
                 borderRadius: BorderRadius.circular(999),
-                border: Border.all(color: Colors.white, width: 1.2),
+                border: Border.all(
+                  color: selected
+                      ? AppColors.auraIndigo.withValues(alpha: 0.42)
+                      : const Color(0xFFD5DAE4),
+                  width: selected ? 1.4 : 1.1,
+                ),
               ),
               child: Row(
                 mainAxisSize: MainAxisSize.min,
@@ -477,6 +486,7 @@ class _HomePageState extends ConsumerState<HomePage>
   }
 
   void _showAttachmentPicker(BuildContext context) {
+    _dismissKeyboard();
     showModalBottomSheet(
       context: context,
       backgroundColor: Colors.white,
@@ -496,6 +506,7 @@ class _HomePageState extends ConsumerState<HomePage>
                 title: const Text('拍照'),
                 onTap: () {
                   Navigator.pop(ctx);
+                  _dismissKeyboard();
                   _pickImage(ImageSource.camera);
                 },
               ),
@@ -507,6 +518,7 @@ class _HomePageState extends ConsumerState<HomePage>
                 title: const Text('从相册选择'),
                 onTap: () {
                   Navigator.pop(ctx);
+                  _dismissKeyboard();
                   _pickImage(ImageSource.gallery);
                 },
               ),
@@ -518,6 +530,7 @@ class _HomePageState extends ConsumerState<HomePage>
                 title: const Text('上传 PDF'),
                 onTap: () async {
                   Navigator.pop(ctx);
+                  _dismissKeyboard();
                   final result = await FilePicker.platform.pickFiles(
                     type: FileType.custom,
                     allowedExtensions: ['pdf'],
@@ -532,6 +545,7 @@ class _HomePageState extends ConsumerState<HomePage>
                       .read(chatProvider.notifier)
                       .sendPdf(path, pdfFile.name, _textCtrl.text.trim());
                   _textCtrl.clear();
+                  _dismissKeyboard();
                   if (mounted) setState(() {});
                 },
               ),
@@ -543,17 +557,25 @@ class _HomePageState extends ConsumerState<HomePage>
   }
 
   Future<void> _pickImage(ImageSource source) async {
+    _dismissKeyboard();
     final picked = await ImagePicker().pickImage(
       source: source,
       imageQuality: 85,
     );
+    _dismissKeyboard();
     if (picked != null) {
       final token = await ref.read(apiClientProvider).accessToken;
       if (token == null) return;
       setState(() => _pickedImagePath = picked.path);
+      WidgetsBinding.instance.addPostFrameCallback((_) => _dismissKeyboard());
     }
   }
 
+  void _dismissKeyboard() {
+    _focusNode.unfocus();
+    FocusManager.instance.primaryFocus?.unfocus();
+  }
+
   Future<void> _pickFoodImage(ImageSource source) async {
     final picked = await ImagePicker().pickImage(
       source: source,

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

@@ -859,13 +859,13 @@ class ChatMessagesView extends ConsumerWidget {
                       ),
                     ],
                   ),
-                  child: msg.confirmed
+                  child: msg.confirmed || msg.isReadOnly
                       ? Container(
                           decoration: BoxDecoration(
                             gradient: AppColors.successButtonGradient,
                             borderRadius: BorderRadius.circular(18),
                           ),
-                          child: const Row(
+                          child: Row(
                             mainAxisAlignment: MainAxisAlignment.center,
                             children: [
                               Icon(
@@ -873,10 +873,10 @@ class ChatMessagesView extends ConsumerWidget {
                                 size: 22,
                                 color: Colors.white,
                               ),
-                              SizedBox(width: 8),
+                              const SizedBox(width: 8),
                               Text(
-                                '录入成功',
-                                style: TextStyle(
+                                msg.isReadOnly ? '历史记录' : '录入成功',
+                                style: const TextStyle(
                                   fontSize: 19,
                                   fontWeight: FontWeight.w700,
                                   color: Colors.white,
@@ -1236,9 +1236,7 @@ class ChatMessagesView extends ConsumerWidget {
             ClipRRect(
               borderRadius: BorderRadius.circular(12),
               child: InteractiveViewer(
-                child: path.startsWith('http')
-                    ? Image.network(resolvedPath, fit: BoxFit.contain)
-                    : resolvedPath.startsWith('http')
+                child: resolvedPath.startsWith('http')
                     ? Image.network(resolvedPath, fit: BoxFit.contain)
                     : Image.file(File(resolvedPath), fit: BoxFit.contain),
               ),
@@ -1270,20 +1268,6 @@ class ChatMessagesView extends ConsumerWidget {
     return path;
   }
 
-  /// 清理 AI 返回文本中的异常占位符（Markdown 格式交给 MarkdownBody 渲染）
-  // ignore: unused_element
-  static String _cleanAiText(String text) {
-    var t = text;
-    // 移除 $1、$2 等占位符
-    t = t.replaceAll(RegExp(r'\$\d+'), '');
-    // 移除残留 HTML 标签
-    t = t.replaceAll(RegExp(r'<[^>]+>'), '');
-    // 行首 # 超过 3 个降为 ###
-    t = t.replaceAllMapped(RegExp(r'^#{4,}\s', multiLine: true), (_) => '### ');
-    // 压缩多余空行
-    t = t.replaceAll(RegExp(r'\n{3,}'), '\n\n');
-    return t.trim();
-  }
 
   /// 处理 AI 回复里的 markdown 链接点击：
   /// - app://diet → 触发拍照/相册选择，跳到饮食拍照流程
@@ -2098,77 +2082,3 @@ extension _AgentActionsExt on ActiveAgent {
       _agentActions[this] ??
       [const _AgentAction(label: '开始对话', icon: Icons.chat_outlined)];
 }
-
-// ════════════════════════════════════════════════════════════════
-// 可展开的 AI 建议小组件
-// ════════════════════════════════════════════════════════════════
-
-class _ExpandableAdvice extends StatefulWidget {
-  final String advice;
-  const _ExpandableAdvice({required this.advice});
-
-  @override
-  State<_ExpandableAdvice> createState() => _ExpandableAdviceState();
-}
-
-class _ExpandableAdviceState extends State<_ExpandableAdvice> {
-  bool _expanded = false;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: () => setState(() => _expanded = !_expanded),
-      child: Container(
-        width: double.infinity,
-        padding: const EdgeInsets.all(14),
-        decoration: BoxDecoration(
-          color: AppColors.backgroundSecondary,
-          borderRadius: BorderRadius.circular(12),
-          border: Border.all(color: const Color(0xFFE8E4FF), width: 0.8),
-        ),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Row(
-              children: [
-                const Icon(
-                  Icons.lightbulb_outline,
-                  size: 19,
-                  color: AppTheme.primary,
-                ),
-                const SizedBox(width: 6),
-                const Text(
-                  'AI 建议',
-                  style: TextStyle(
-                    fontSize: 16,
-                    fontWeight: FontWeight.w600,
-                    color: AppTheme.primary,
-                  ),
-                ),
-                const Spacer(),
-                Icon(
-                  _expanded
-                      ? Icons.keyboard_arrow_up
-                      : Icons.keyboard_arrow_down,
-                  size: 21,
-                  color: AppColors.textHint,
-                ),
-              ],
-            ),
-            if (_expanded) ...[
-              const SizedBox(height: 10),
-              Text(
-                widget.advice,
-                style: const TextStyle(
-                  fontSize: 16,
-                  color: Color(0xFF555555),
-                  height: 1.6,
-                ),
-              ),
-            ],
-          ],
-        ),
-      ),
-    );
-  }
-}