feat: UI 系统中心化 + 趋势图重构 + 法律文档 H5 上线

- UI 系统: 新增 design_tokens / module_visuals / app_buttons / app_status_badge / app_toast / ai_content 六个共享模块; 28 个页面接入, SnackBar 全部替换为 AppToast
- 趋势图: 直线折线 + 渐变填充 + 阴影; 去网格线; X 轴日+月份分隔; 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
- 法律文档 H5: 后端 wwwroot 托管隐私政策/服务协议/关于/个人信息收集清单/第三方 SDK 清单 + 索引页; Program.cs 启用 UseDefaultFiles + UseStaticFiles
- 其他: auth_provider 登录流程调整; api_client IP 适配; 主页智能体栏间距优化

health_app/lib/widgets/ble_sync_dialog.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 
 import '../core/app_colors.dart';
+import '../core/app_design_tokens.dart';
+import '../core/app_module_visuals.dart';
 import '../models/bp_reading.dart';
 
 Future<void> showBleSyncDialog(
@@ -17,31 +19,35 @@ Future<void> showBleSyncDialog(
       child: Container(
         width: double.infinity,
         constraints: const BoxConstraints(maxWidth: 380),
-        padding: const EdgeInsets.fromLTRB(22, 28, 22, 22),
+        padding: const EdgeInsets.fromLTRB(22, 26, 22, 22),
         decoration: BoxDecoration(
           color: Colors.white,
-          borderRadius: BorderRadius.circular(28),
-          boxShadow: [
-            BoxShadow(
-              color: Colors.black.withValues(alpha: 0.14),
-              blurRadius: 34,
-              offset: const Offset(0, 18),
-            ),
-          ],
+          borderRadius: AppRadius.xlBorder,
+          boxShadow: AppShadows.floating,
         ),
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            const Text(
-              '数据已录入',
-              textAlign: TextAlign.center,
-              style: TextStyle(
-                fontSize: 22,
-                fontWeight: FontWeight.w900,
-                color: AppColors.textPrimary,
+            Container(
+              width: 48,
+              height: 48,
+              decoration: BoxDecoration(
+                gradient: AppModuleVisuals.device.gradient,
+                borderRadius: AppRadius.mdBorder,
+              ),
+              child: Icon(
+                AppModuleVisuals.device.icon,
+                color: Colors.white,
+                size: 25,
               ),
             ),
-            const SizedBox(height: 24),
+            const SizedBox(height: 14),
+            Text(
+              '数据已录入',
+              textAlign: TextAlign.center,
+              style: AppTextStyles.summaryTitle.copyWith(fontSize: 22),
+            ),
+            const SizedBox(height: 22),
             Row(
               children: [
                 Expanded(
@@ -51,7 +57,7 @@ Future<void> showBleSyncDialog(
                     unit: 'mmHg',
                   ),
                 ),
-                const SizedBox(width: 16),
+                const SizedBox(width: 14),
                 Expanded(
                   child: _MetricCard(
                     label: '舒张压',
@@ -62,7 +68,7 @@ Future<void> showBleSyncDialog(
               ],
             ),
             if (reading.pulse != null) ...[
-              const SizedBox(height: 16),
+              const SizedBox(height: 14),
               Row(
                 children: [
                   Expanded(
@@ -76,7 +82,7 @@ Future<void> showBleSyncDialog(
                 ],
               ),
             ],
-            const SizedBox(height: 28),
+            const SizedBox(height: 26),
             GestureDetector(
               onTap: () => Navigator.pop(ctx),
               child: Container(
@@ -84,17 +90,13 @@ Future<void> showBleSyncDialog(
                 width: double.infinity,
                 alignment: Alignment.center,
                 decoration: BoxDecoration(
-                  gradient: AppColors.doctorGradient,
-                  borderRadius: BorderRadius.circular(18),
+                  gradient: AppModuleVisuals.device.gradient,
+                  borderRadius: AppRadius.lgBorder,
                   boxShadow: AppColors.buttonShadow,
                 ),
-                child: const Text(
+                child: Text(
                   '知道了',
-                  style: TextStyle(
-                    color: Colors.white,
-                    fontSize: 16,
-                    fontWeight: FontWeight.w900,
-                  ),
+                  style: AppTextStyles.button.copyWith(color: Colors.white),
                 ),
               ),
             ),
@@ -121,8 +123,9 @@ class _MetricCard extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.symmetric(vertical: 16),
       decoration: BoxDecoration(
-        color: const Color(0xFFF8FAFC),
-        borderRadius: BorderRadius.circular(14),
+        color: AppModuleVisuals.device.lightColor,
+        borderRadius: AppRadius.mdBorder,
+        border: Border.all(color: AppModuleVisuals.device.borderColor),
       ),
       child: Column(
         children: [
@@ -136,23 +139,9 @@ class _MetricCard extends StatelessWidget {
             ),
           ),
           const SizedBox(height: 6),
-          Text(
-            unit,
-            style: const TextStyle(
-              fontSize: 13,
-              fontWeight: FontWeight.w700,
-              color: AppColors.textHint,
-            ),
-          ),
+          Text(unit, style: AppTextStyles.tag),
           const SizedBox(height: 4),
-          Text(
-            label,
-            style: const TextStyle(
-              fontSize: 13,
-              fontWeight: FontWeight.w700,
-              color: AppColors.textSecondary,
-            ),
-          ),
+          Text(label, style: AppTextStyles.tag),
         ],
       ),
     );