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/auth/login_page.dart

@@ -1,11 +1,12 @@
 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';
 
 class LoginPage extends ConsumerStatefulWidget {
   const LoginPage({super.key});
-
   @override ConsumerState<LoginPage> createState() => _LoginPageState();
 }
 
@@ -32,54 +33,216 @@ class _LoginPageState extends ConsumerState<LoginPage> {
   }
 
   void _startCountdown() async {
-    for (var i = 60; i > 0; i--) { await Future.delayed(const Duration(seconds: 1)); if (!mounted) return; setState(() => _countdown = i - 1); }
+    for (var i = 60; i > 0; i--) {
+      await Future.delayed(const Duration(seconds: 1));
+      if (!mounted) return;
+      setState(() => _countdown = i - 1);
+    }
   }
 
   Future<void> _login() async {
     if (!_agreed) { setState(() => _error = '请阅读并同意服务协议和隐私政策'); return; }
     setState(() { _loading = true; _error = null; });
     final err = await ref.read(authProvider.notifier).login(_phoneCtrl.text.trim(), _codeCtrl.text.trim());
-    setState(() => _loading = false );
+    setState(() => _loading = false);
     if (err != null) { setState(() => _error = err); return; }
     goRoute(ref, 'home');
   }
 
   @override Widget build(BuildContext context) {
     final authState = ref.watch(authProvider);
-    if (authState.isLoggedIn && !authState.isLoading) WidgetsBinding.instance.addPostFrameCallback((_) => goRoute(ref, 'home'));
+    final theme = ShadTheme.of(context);
+    if (authState.isLoggedIn && !authState.isLoading) {
+      WidgetsBinding.instance.addPostFrameCallback((_) => goRoute(ref, 'home'));
+    }
 
     return Scaffold(
       body: Container(
-        decoration: const BoxDecoration(gradient: LinearGradient(begin: Alignment.topLeft, end: Alignment.bottomRight, colors: [Color(0xFFF0F2FF), Color(0xFFF0F2FF), Color(0xFFE8E4FF)])),
-        child: SafeArea(child: Center(child: Padding(padding: const EdgeInsets.symmetric(horizontal: 32), child: Column(mainAxisSize: MainAxisSize.min, children: [
-          const SizedBox(height: 24),
-          Container(width: 100, height: 100, decoration: BoxDecoration(color: const Color(0xFF6C5CE7).withAlpha(20), borderRadius: BorderRadius.circular(50)), child: Stack(alignment: Alignment.center, children: [
-            Container(width: 72, height: 72, decoration: BoxDecoration(color: Colors.white.withAlpha(200), borderRadius: BorderRadius.circular(36)), child: const Icon(Icons.favorite, size: 36, color: Color(0xFF6C5CE7))),
-          ])),
-          const SizedBox(height: 20),
-          const Text('健康管家', style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold, color: Color(0xFF1A1A1A))),
-          const SizedBox(height: 8),
-          Text('你的 AI 心脏健康管家', style: TextStyle(fontSize: 15, color: Colors.grey[500])),
-          const SizedBox(height: 36),
-          TextField(controller: _phoneCtrl, keyboardType: TextInputType.phone, maxLength: 11,
-            decoration: InputDecoration(hintText: '请输入手机号', prefixIcon: const Padding(padding: EdgeInsets.only(left: 12), child: Text('+86', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w500))), counterText: '', filled: true, fillColor: Colors.white, border: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none), enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none), focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: const BorderSide(color: Color(0xFF6C5CE7), width: 1.5)))),
-          const SizedBox(height: 16),
-          Row(children: [
-            Expanded(child: TextField(controller: _codeCtrl, keyboardType: TextInputType.number, maxLength: 6,
-              decoration: InputDecoration(hintText: '验证码', filled: true, fillColor: Colors.white, border: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none), enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none), focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: const BorderSide(color: Color(0xFF6C5CE7), width: 1.5)), counterText: ''))),
-            const SizedBox(width: 12),
-            GestureDetector(onTap: (_countdown > 0 || _sending) ? null : _sendSms, child: Container(width: 100, height: 48, alignment: Alignment.center, decoration: BoxDecoration(color: _countdown > 0 ? Colors.grey[300] : const Color(0xFF6C5CE7), borderRadius: BorderRadius.circular(12)), child: Text(_sending ? '发送中' : _countdown > 0 ? '${_countdown}s' : '获取验证码', style: TextStyle(fontSize: 14, color: _countdown > 0 ? Colors.grey[600] : Colors.white, fontWeight: FontWeight.w500)))),
+        decoration: const BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topLeft,
+            end: Alignment.bottomRight,
+            colors: [AppTheme.bg, AppTheme.bg, AppTheme.primaryLight],
+          ),
+        ),
+        child: SafeArea(child: Center(child: SingleChildScrollView(
+          padding: const EdgeInsets.symmetric(horizontal: 32),
+          child: Column(mainAxisSize: MainAxisSize.min, children: [
+            const SizedBox(height: 24),
+            // Logo
+            Container(
+              width: 100, height: 100,
+              decoration: BoxDecoration(
+                color: AppTheme.primary.withAlpha(25),
+                borderRadius: BorderRadius.circular(50),
+              ),
+              child: Stack(alignment: Alignment.center, children: [
+                Container(
+                  width: 72, height: 72,
+                  decoration: BoxDecoration(
+                    color: Colors.white.withAlpha(200),
+                    borderRadius: BorderRadius.circular(36),
+                  ),
+                  child: const Icon(LucideIcons.heart, size: 36, color: AppTheme.primary),
+                ),
+              ]),
+            ),
+            const SizedBox(height: 20),
+            Text('健康管家', style: TextStyle(fontSize: 32, fontWeight: FontWeight.bold, color: theme.colorScheme.foreground)),
+            const SizedBox(height: 8),
+            Text('你的 AI 心脏健康管家', style: TextStyle(fontSize: 18, color: theme.colorScheme.mutedForeground)),
+            const SizedBox(height: 36),
+
+            // 手机号输入
+            _buildPhoneInput(theme),
+            const SizedBox(height: AppTheme.sLg),
+
+            // 验证码输入
+            _buildCodeRow(theme),
+            const SizedBox(height: AppTheme.sSm),
+
+            // 协议勾选
+            _buildAgreement(theme),
+
+            // 错误提示
+            if (_error != null)
+              Padding(padding: const EdgeInsets.only(top: AppTheme.sMd), child: Text(_error!, style: TextStyle(color: theme.colorScheme.destructive, fontSize: 16))),
+
+            const SizedBox(height: AppTheme.rXl),
+
+            // 登录按钮
+            _buildLoginButton(theme),
+
+            const SizedBox(height: AppTheme.sXl),
           ]),
-          const SizedBox(height: 8),
-          Align(alignment: Alignment.centerLeft, child: GestureDetector(onTap: () => setState(() => _agreed = !_agreed), child: Row(mainAxisSize: MainAxisSize.min, children: [
-            Container(width: 20, height: 20, margin: const EdgeInsets.only(right: 6), decoration: BoxDecoration(shape: BoxShape.rectangle, color: _agreed ? const Color(0xFF6C5CE7) : Colors.transparent, border: Border.all(color: _agreed ? const Color(0xFF6C5CE7) : const Color(0xFFBDBDBD), width: 1.5), borderRadius: BorderRadius.circular(4)), child: _agreed ? const Icon(Icons.check, size: 14, color: Colors.white) : null),
-            RichText(text: TextSpan(children: [TextSpan(text: '已阅读并同意', style: TextStyle(fontSize: 13, color: Colors.grey[600])), TextSpan(text: '《服务协议》', style: const TextStyle(fontSize: 13, color: Color(0xFF6C5CE7))), TextSpan(text: '和', style: TextStyle(fontSize: 13, color: Colors.grey[600])), TextSpan(text: '《隐私政策》', style: const TextStyle(fontSize: 13, color: Color(0xFF6C5CE7)))])),
-          ]))),
-          if (_error != null) Padding(padding: const EdgeInsets.only(top: 12), child: Text(_error!, style: const TextStyle(color: Color(0xFFE53935), fontSize: 13))),
-          const SizedBox(height: 24),
-          GestureDetector(onTap: _loading ? null : _login, child: Container(width: double.infinity, height: 50, alignment: Alignment.center, decoration: BoxDecoration(gradient: const LinearGradient(colors: [Color(0xFFA8B5FA), Color(0xFF6C5CE7)]), borderRadius: BorderRadius.circular(25), boxShadow: [BoxShadow(color: const Color(0xFF6C5CE7).withAlpha(80), blurRadius: 16, offset: const Offset(0, 8))]), child: _loading ? const SizedBox(width: 24, height: 24, child: CircularProgressIndicator(strokeWidth: 2.5, color: Colors.white)) : const Text('登 录', style: TextStyle(fontSize: 17, color: Colors.white, fontWeight: FontWeight.w600, letterSpacing: 2)))),
-          const SizedBox(height: 20),
-        ])))),
+        ))),
+      ),
+    );
+  }
+
+  Widget _buildPhoneInput(ShadThemeData theme) {
+    return Container(
+      decoration: BoxDecoration(
+        color: theme.colorScheme.card,
+        borderRadius: BorderRadius.circular(AppTheme.rSm),
+        boxShadow: [AppTheme.shadowLight],
+      ),
+      child: Row(children: [
+        const Padding(padding: EdgeInsets.only(left: AppTheme.sLg), child: Text('+86', style: TextStyle(fontSize: 19, fontWeight: FontWeight.w500, color: AppTheme.text))),
+        Container(width: 1, height: 24, color: theme.colorScheme.border, margin: const EdgeInsets.symmetric(horizontal: AppTheme.sMd)),
+        Expanded(
+          child: TextField(
+            controller: _phoneCtrl,
+            keyboardType: TextInputType.phone,
+            maxLength: 11,
+            style: TextStyle(fontSize: 19, color: theme.colorScheme.foreground),
+            decoration: InputDecoration(
+              hintText: '请输入手机号',
+              hintStyle: TextStyle(color: theme.colorScheme.mutedForeground),
+              border: InputBorder.none,
+              counterText: '',
+              contentPadding: const EdgeInsets.symmetric(vertical: AppTheme.sLg),
+            ),
+          ),
+        ),
+      ]),
+    );
+  }
+
+  Widget _buildCodeRow(ShadThemeData theme) {
+    final codeDisabled = _countdown > 0 || _sending;
+    return Row(children: [
+      Expanded(
+        child: Container(
+          decoration: BoxDecoration(
+            color: theme.colorScheme.card,
+            borderRadius: BorderRadius.circular(AppTheme.rSm),
+            boxShadow: [AppTheme.shadowLight],
+          ),
+          child: TextField(
+            controller: _codeCtrl,
+            keyboardType: TextInputType.number,
+            maxLength: 6,
+            style: TextStyle(fontSize: 19, color: theme.colorScheme.foreground),
+            decoration: InputDecoration(
+              hintText: '验证码',
+              hintStyle: TextStyle(color: theme.colorScheme.mutedForeground),
+              border: InputBorder.none,
+              counterText: '',
+              contentPadding: const EdgeInsets.symmetric(horizontal: AppTheme.sLg, vertical: AppTheme.sLg),
+            ),
+          ),
+        ),
+      ),
+      const SizedBox(width: AppTheme.sMd),
+      GestureDetector(
+        onTap: codeDisabled ? null : _sendSms,
+        child: AnimatedContainer(
+          duration: const Duration(milliseconds: 200),
+          width: 110, height: 52,
+          alignment: Alignment.center,
+          decoration: BoxDecoration(
+            color: codeDisabled ? theme.colorScheme.muted : AppTheme.primary,
+            borderRadius: BorderRadius.circular(AppTheme.rSm),
+          ),
+          child: Text(
+            _sending ? '发送中' : _countdown > 0 ? '${_countdown}s' : '获取验证码',
+            style: TextStyle(
+              fontSize: 17,
+              color: codeDisabled ? theme.colorScheme.mutedForeground : Colors.white,
+              fontWeight: FontWeight.w500,
+            ),
+          ),
+        ),
+      ),
+    ]);
+  }
+
+  Widget _buildAgreement(ShadThemeData theme) {
+    return Align(
+      alignment: Alignment.centerLeft,
+      child: GestureDetector(
+        onTap: () => setState(() => _agreed = !_agreed),
+        child: Row(mainAxisSize: MainAxisSize.min, children: [
+          Container(
+            width: 18, height: 18,
+            margin: const EdgeInsets.only(right: 6),
+            decoration: BoxDecoration(
+              color: _agreed ? AppTheme.primary : Colors.transparent,
+              borderRadius: BorderRadius.circular(4),
+              border: Border.all(
+                color: _agreed ? AppTheme.primary : theme.colorScheme.border,
+                width: 1.5,
+              ),
+            ),
+            child: _agreed ? Icon(LucideIcons.check, size: 15, color: theme.colorScheme.primaryForeground) : null,
+          ),
+          RichText(text: TextSpan(children: [
+            TextSpan(text: '已阅读并同意', style: TextStyle(fontSize: 16, color: theme.colorScheme.mutedForeground)),
+            TextSpan(text: '《服务协议》', style: const TextStyle(fontSize: 16, color: AppTheme.primary)),
+            TextSpan(text: '和', style: TextStyle(fontSize: 16, color: theme.colorScheme.mutedForeground)),
+            TextSpan(text: '《隐私政策》', style: const TextStyle(fontSize: 16, color: AppTheme.primary)),
+          ])),
+        ]),
+      ),
+    );
+  }
+
+  Widget _buildLoginButton(ShadThemeData theme) {
+    return GestureDetector(
+      onTap: _loading ? null : _login,
+      child: Container(
+        width: double.infinity,
+        height: 52,
+        alignment: Alignment.center,
+        decoration: BoxDecoration(
+          gradient: const LinearGradient(colors: [Color(0xFF9B8FEF), AppTheme.primary]),
+          borderRadius: BorderRadius.circular(AppTheme.rPill),
+          boxShadow: [BoxShadow(color: AppTheme.primary.withAlpha(80), blurRadius: 16, offset: const Offset(0, 8))],
+        ),
+        child: _loading
+            ? const SizedBox(width: 24, height: 24, child: CircularProgressIndicator(strokeWidth: 2.5, color: Colors.white))
+            : const Text('登 录', style: TextStyle(fontSize: 20, color: Colors.white, fontWeight: FontWeight.w600, letterSpacing: 2)),
       ),
     );
   }