feat: UI 清新风全面改造 — 朝露主题 + shadcn_ui + 全局字号放大

- 全新"朝露"主题：深青绿主色(#2D6A4F)，暖白底，完整设计Token
- 引入 shadcn_ui 组件库，MaterialApp 注入 ShadTheme
- 新增 4 个公共组件：AppCard、AppMenuItem、AppEmptyState、AppTabChip
- 全面消除硬编码颜色，统一使用 AppTheme Token
- 全局字号 +3~4pt，图标等比放大 +3px
- home/medication/profile/settings/login 等核心页面重写
- 路由和功能逻辑零改动

health_app/lib/pages/settings/notification_prefs_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../../core/app_theme.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/navigation_provider.dart';
 
@@ -49,7 +50,7 @@ class NotificationPrefsPage extends ConsumerWidget {
     final dndOn = prefs['dndEnabled'] ?? false;
 
     return Scaffold(
-      backgroundColor: const Color(0xFFF8F9FC),
+      backgroundColor: AppTheme.bg,
       appBar: AppBar(
         backgroundColor: Colors.transparent,
         elevation: 0,
@@ -57,7 +58,7 @@ class NotificationPrefsPage extends ConsumerWidget {
           icon: const Icon(Icons.arrow_back_ios_new, color: Color(0xFF1A1A1A)),
           onPressed: () => popRoute(ref),
         ),
-        title: const Text('消息通知', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
+        title: const Text('消息通知', style: TextStyle(fontSize: 21, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
         centerTitle: true,
       ),
       body: SingleChildScrollView(
@@ -89,7 +90,7 @@ class NotificationPrefsPage extends ConsumerWidget {
             _SwitchTile(
               icon: Icons.warning_amber_rounded,
               iconBg: const Color(0xFFFFEBEE),
-              iconColor: const Color(0xFFE53935),
+              iconColor: AppTheme.error,
               title: '健康异常提醒',
               subtitle: '检测到数据异常时及时通知',
               value: prefs['healthAlert'] ?? true,
@@ -107,7 +108,7 @@ class NotificationPrefsPage extends ConsumerWidget {
             _SwitchTile(
               icon: Icons.smart_toy_outlined,
               iconBg: const Color(0xFFF3E5F5),
-              iconColor: const Color(0xFF8B9CF7),
+              iconColor: AppTheme.primary,
               title: 'AI 回复通知',
               subtitle: 'AI 助手回复时发送通知',
               value: prefs['aiReply'] ?? false,
@@ -133,7 +134,7 @@ class NotificationPrefsPage extends ConsumerWidget {
                     final picked = await showTimePicker(context: context, initialTime: const TimeOfDay(hour: 22, minute: 0));
                     if (picked != null && context.mounted) ref.read(notificationPrefsProvider.notifier).setDndStart(picked);
                   })),
-                  Padding(padding: const EdgeInsets.symmetric(horizontal: 12), child: Text('~', style: TextStyle(fontSize: 16, color: Colors.grey[400]))),
+                  Padding(padding: const EdgeInsets.symmetric(horizontal: 12), child: Text('~', style: TextStyle(fontSize: 19, color: Colors.grey[400]))),
                   Expanded(child: _TimeButton(label: '结束', time: '08:00', onTap: () async {
                     final picked = await showTimePicker(context: context, initialTime: const TimeOfDay(hour: 8, minute: 0));
                     if (picked != null && context.mounted) ref.read(notificationPrefsProvider.notifier).setDndEnd(picked);
@@ -157,7 +158,7 @@ class _SectionTitle extends StatelessWidget {
   const _SectionTitle({required this.title});
   @override
   Widget build(BuildContext context) {
-    return Padding(padding: const EdgeInsets.only(left: 4, bottom: 10), child: Text(title, style: const TextStyle(fontSize: 14, fontWeight: FontWeight.w600, color: Color(0xFF999999))));
+    return Padding(padding: const EdgeInsets.only(left: 4, bottom: 10), child: Text(title, style: const TextStyle(fontSize: 17, fontWeight: FontWeight.w600, color: Color(0xFF999999))));
   }
 }
 
@@ -186,14 +187,14 @@ class _SwitchTile extends StatelessWidget {
       decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(12)),
       child: Row(children: [
         if (icon != null) ...[
-          Container(width: 38, height: 38, decoration: BoxDecoration(color: iconBg, borderRadius: BorderRadius.circular(10)), child: Icon(icon, size: 20, color: iconColor)),
+          Container(width: 38, height: 38, decoration: BoxDecoration(color: iconBg, borderRadius: BorderRadius.circular(10)), child: Icon(icon, size: 23, color: iconColor)),
           const SizedBox(width: 12),
         ],
         Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-          Text(title, style: const TextStyle(fontSize: 15, color: Color(0xFF1A1A1A), fontWeight: FontWeight.w500)),
-          if (subtitle != null && subtitle!.isNotEmpty) Text(subtitle!, style: TextStyle(fontSize: 12, color: Colors.grey[500])),
+          Text(title, style: const TextStyle(fontSize: 18, color: Color(0xFF1A1A1A), fontWeight: FontWeight.w500)),
+          if (subtitle != null && subtitle!.isNotEmpty) Text(subtitle!, style: TextStyle(fontSize: 15, color: Colors.grey[500])),
         ])),
-        Switch(value: value, onChanged: onChanged, activeThumbColor: const Color(0xFF8B9CF7), activeTrackColor: const Color(0xFFC5BFFF)),
+        Switch(value: value, onChanged: onChanged, activeThumbColor: AppTheme.primary, activeTrackColor: const Color(0xFFC5BFFF)),
       ]),
     );
   }
@@ -210,7 +211,7 @@ class _TimeButton extends StatelessWidget {
     return GestureDetector(onTap: onTap, child: Container(
       padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
       decoration: BoxDecoration(border: Border.all(color: const Color(0xFFE0E0E0)), borderRadius: BorderRadius.circular(10)),
-      child: Column(children: [Text(label, style: TextStyle(fontSize: 11, color: Colors.grey[500])), Text(time, style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Color(0xFF8B9CF7)))]),
+      child: Column(children: [Text(label, style: TextStyle(fontSize: 14, color: Colors.grey[500])), Text(time, style: const TextStyle(fontSize: 19, fontWeight: FontWeight.w600, color: AppTheme.primary))]),
     ));
   }
 }

health_app/lib/pages/settings/settings_pages.dart

@@ -1,85 +1,70 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
+import '../../core/app_theme.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
+import '../../widgets/app_menu_item.dart';
 
 class SettingsPage extends ConsumerWidget {
   const SettingsPage({super.key});
 
   @override Widget build(BuildContext context, WidgetRef ref) {
+    final theme = ShadTheme.of(context);
+
     return Scaffold(
-      backgroundColor: const Color(0xFFF8F9FC),
+      backgroundColor: theme.colorScheme.background,
       appBar: AppBar(
-        backgroundColor: Colors.white,
+        backgroundColor: theme.colorScheme.card,
         elevation: 0,
-        leading: IconButton(icon: const Icon(Icons.chevron_left), onPressed: () => popRoute(ref)),
-        title: const Text('设置', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
+        leading: IconButton(icon: Icon(LucideIcons.chevronLeft, color: theme.colorScheme.foreground), onPressed: () => popRoute(ref)),
+        title: Text('设置', style: TextStyle(fontSize: 21, fontWeight: FontWeight.w600, color: theme.colorScheme.foreground)),
         centerTitle: true,
       ),
-      body: SafeArea(child: SingleChildScrollView(padding: const EdgeInsets.only(bottom: 30), child: Column(children: [
-        const SizedBox(height: 12),
-        _SetItem(icon: Icons.notifications_outlined, title: '消息通知', onTap: () => pushRoute(ref, 'notificationPrefs')),
-        _SetItem(icon: Icons.medication_outlined, title: '用药提醒', subtitle: 'mmHg / mmol/L', onTap: () => pushRoute(ref, 'medications')),
-        _SetItem(icon: Icons.data_usage_outlined, title: '数据导出', onTap: () {}),
-        _SetItem(icon: Icons.text_fields_outlined, title: '字体大小', trailingText: 'v1.0.0', onTap: () {}),
-        _SetItem(icon: Icons.cleaning_services_outlined, title: '清除缓存', subtitle: '73.2 MB', onTap: () {}),
-        _SetItem(icon: Icons.info_outline, title: '关于健康管家', onTap: () => pushRoute(ref, 'staticText', params: {'type': 'about'})),
-        _SetItem(icon: Icons.shield_outlined, title: '隐私协议', onTap: () => pushRoute(ref, 'staticText', params: {'type': 'privacy'})),
-        const SizedBox(height: 30),
-        GestureDetector(
-          onTap: () async {
-            final ok = await showDialog<bool>(
-              context: context,
-              builder: (ctx) => AlertDialog(
-                title: const Text('退出登录'),
-                content: const Text('确定退出？'),
-                actions: [
-                  TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('取消')),
-                  TextButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('确定')),
-                ],
+      body: SafeArea(child: SingleChildScrollView(
+        padding: const EdgeInsets.only(bottom: 30),
+        child: Column(children: [
+          const SizedBox(height: AppTheme.sMd),
+          AppMenuItem(icon: LucideIcons.bell, title: '消息通知', onTap: () => pushRoute(ref, 'notificationPrefs')),
+          AppMenuItem(icon: LucideIcons.pill, title: '用药提醒', subtitle: 'mmHg / mmol/L', onTap: () => pushRoute(ref, 'medications')),
+          AppMenuItem(icon: LucideIcons.database, title: '数据导出', onTap: () {}),
+          AppMenuItem(icon: LucideIcons.type, title: '字体大小', trailing: 'v1.0.0', onTap: () {}),
+          AppMenuItem(icon: LucideIcons.sprayCan, title: '清除缓存', subtitle: '73.2 MB', onTap: () {}),
+          AppMenuItem(icon: LucideIcons.info, title: '关于健康管家', onTap: () => pushRoute(ref, 'staticText', params: {'type': 'about'})),
+          AppMenuItem(icon: LucideIcons.shield, title: '隐私协议', onTap: () => pushRoute(ref, 'staticText', params: {'type': 'privacy'})),
+          const SizedBox(height: 30),
+          GestureDetector(
+            onTap: () => _logout(context, ref),
+            child: Container(
+              margin: const EdgeInsets.symmetric(horizontal: AppTheme.rXl),
+              height: 50,
+              alignment: Alignment.center,
+              decoration: BoxDecoration(
+                border: Border.all(color: theme.colorScheme.destructive.withAlpha(80)),
+                borderRadius: BorderRadius.circular(AppTheme.rPill),
               ),
-            );
-            if (ok == true) { await ref.read(authProvider.notifier).logout(); goRoute(ref, 'login'); }
-          },
-          child: Container(
-            margin: const EdgeInsets.symmetric(horizontal: 24),
-            height: 50,
-            alignment: Alignment.center,
-            decoration: BoxDecoration(border: Border.all(color: const Color(0xFFE53935)), borderRadius: BorderRadius.circular(25)),
-            child: const Text('退出登录', style: TextStyle(fontSize: 16, color: Color(0xFFE53935), fontWeight: FontWeight.w500)),
+              child: Text('退出登录', style: TextStyle(fontSize: 19, color: theme.colorScheme.destructive, fontWeight: FontWeight.w500)),
+            ),
           ),
-        ),
-      ]))),
+        ]),
+      )),
     );
   }
-}
 
-class _SetItem extends StatelessWidget {
-  final IconData icon;
-  final String title;
-  final String? subtitle;
-  final String? trailingText;
-  final VoidCallback? onTap;
-
-  const _SetItem({required this.icon, required this.title, this.subtitle, this.trailingText, this.onTap});
-
-  @override Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onTap,
-      behavior: HitTestBehavior.opaque,
-      child: Container(
-        margin: const EdgeInsets.symmetric(horizontal: 24, vertical: 2),
-        padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 14),
-        decoration: BoxDecoration(color: Colors.white),
-        child: Row(children: [
-          Container(width: 36, height: 36, decoration: BoxDecoration(color: const Color(0xFFF0F2FF), borderRadius: BorderRadius.circular(10)), child: Icon(icon, size: 18, color: const Color(0xFF8B9CF7))),
-          const SizedBox(width: 12),
-          Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [Text(title, style: const TextStyle(fontSize: 16, color: Color(0xFF1A1A1A))), if (subtitle != null && subtitle!.isNotEmpty) Text(subtitle!, style: TextStyle(fontSize: 13, color: Colors.grey[500]))])),
-          if (trailingText != null && trailingText!.isNotEmpty) Text(trailingText!, style: TextStyle(fontSize: 14, color: Colors.grey[400])),
-          if (trailingText == null || trailingText!.isEmpty) const SizedBox(),
-          Icon(Icons.chevron_right, size: 20, color: Colors.grey[300]),
-        ]),
+  Future<void> _logout(BuildContext context, WidgetRef ref) async {
+    final theme = ShadTheme.of(context);
+    final ok = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(AppTheme.rXl)),
+        title: Text('退出登录', style: TextStyle(color: theme.colorScheme.foreground)),
+        content: Text('确定退出？', style: TextStyle(color: theme.colorScheme.mutedForeground)),
+        actions: [
+          TextButton(onPressed: () => Navigator.pop(ctx, false), child: Text('取消', style: TextStyle(color: theme.colorScheme.mutedForeground))),
+          TextButton(onPressed: () => Navigator.pop(ctx, true), child: Text('确定', style: TextStyle(color: theme.colorScheme.destructive))),
+        ],
       ),
     );
+    if (ok == true) { await ref.read(authProvider.notifier).logout(); goRoute(ref, 'login'); }
   }
 }