feat: 二级页面色彩刷新 + 用药/通知/设备重构 + 后端健康档案/通知管线增强 + 大量测试

## 后端
- 健康档案: 新增手术状态字段 + EF 迁移; HealthArchiveService 新增查询方法
- 健康记录: HealthRecordService 新增批量/统计方法; 契约扩展
- 用药: 新增 MedicationScheduleStatus 枚举; MedicationService 排班逻辑调整
- 通知: EfUserNotificationPipeline 重构; 新增 EfReminderCatchUpService; 通知管线支持更多场景
- 用户: UserService 账号删除逻辑; 新增 local_account_file_cleanup; EfUserRepository 扩展
- AI: medication_agent_handler 微调; prompt_manager 优化; AiConversationService 上下文处理
- Endpoint: doctor/medication/exercise/health/notification/user 等多接口调整
- BackgroundService: health_record_reminder_service 重构, 提醒补漏逻辑
- 测试: 新增 account_deletion/doctor_endpoint/medication_schedule/medication_update/prompt_manager 测试

## 前端
- UI 系统: app_theme 大幅重构; app_colors/app_design_tokens/app_module_visuals 调整; 二级页面色彩刷新
- 主页: home_page 背景渐变 + 消息列表提取 _HomeMessages + 通知检查逻辑; chat_messages_view 全面重构
- 用药: medication_list/edit/checkin 三页重构, 新增 medication_ui_logic 抽取
- 通知: notification_prefs_page 重构, 新增 notification_prefs_logic; notification_center 优化
- 设备: device_management 重构, 新增 device_sync_ui_logic; device_scan 优化
- 趋势图: trend_page 大幅重构
- 登录: login_page 重构
- 个人资料: 新增 profile_edit_page; profile_page 优化
- 运动: 新增 exercise/ 目录 + care_plan_ui_logic
- 其他: remaining_pages/report_pages/health_drawer/admin/doctor 等多页面调整
- 组件: common_widgets/app_empty_state/app_error_state/app_future_view/app_toast/ai_content 优化
- Provider: chat_provider/consultation_provider/data_providers/auth_provider 调整
- AndroidManifest: 移除多余权限
- 测试: 新增 ai_content/care_plan/home_message/login_flow/medication_checkin/medication_ui/notification_prefs/profile_device/secondary_page/swipe_delete 等大量测试

## 文档
- 新增 ui-design-system.md 设计系统文档
- 新增 secondary-page-color-refresh 计划 + specs 目录

health_app/lib/widgets/common_widgets.dart

@@ -1,12 +1,118 @@
 import 'package:flutter/material.dart';
 
 import '../core/app_colors.dart';
+import '../core/app_design_tokens.dart';
+
+class AppGradientOutlineButton extends StatelessWidget {
+  final String label;
+  final VoidCallback? onPressed;
+  final bool loading;
+
+  const AppGradientOutlineButton({
+    super.key,
+    required this.label,
+    required this.onPressed,
+    this.loading = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final enabled = onPressed != null && !loading;
+    return DecoratedBox(
+      decoration: BoxDecoration(
+        gradient: enabled ? AppColors.actionOutlineGradient : null,
+        color: enabled ? null : AppColors.borderLight,
+        borderRadius: AppRadius.mdBorder,
+      ),
+      child: Padding(
+        padding: const EdgeInsets.all(1.4),
+        child: Material(
+          color: Colors.white,
+          borderRadius: BorderRadius.circular(AppRadius.md - 1.4),
+          clipBehavior: Clip.antiAlias,
+          child: InkWell(
+            onTap: enabled ? onPressed : null,
+            child: SizedBox(
+              height: 50,
+              child: Center(
+                child: loading
+                    ? const SizedBox.square(
+                        dimension: 19,
+                        child: CircularProgressIndicator(strokeWidth: 2),
+                      )
+                    : Text(
+                        label,
+                        style: AppTextStyles.button.copyWith(
+                          color: enabled
+                              ? AppColors.primaryDark
+                              : AppColors.textHint,
+                        ),
+                      ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class AppCreateFab extends StatelessWidget {
+  final VoidCallback onPressed;
+  final String tooltip;
+  final IconData icon;
+
+  const AppCreateFab({
+    super.key,
+    required this.onPressed,
+    required this.tooltip,
+    this.icon = Icons.add_rounded,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Tooltip(
+      message: tooltip,
+      child: DecoratedBox(
+        key: const ValueKey('app-create-fab-border'),
+        decoration: BoxDecoration(
+          gradient: AppColors.actionOutlineGradient,
+          borderRadius: AppRadius.pillBorder,
+          boxShadow: [
+            BoxShadow(
+              color: const Color(0xFF101828).withValues(alpha: 0.08),
+              blurRadius: 12,
+              offset: const Offset(0, 5),
+            ),
+          ],
+        ),
+        child: Padding(
+          padding: const EdgeInsets.all(1.5),
+          child: Material(
+            color: Colors.white,
+            borderRadius: AppRadius.pillBorder,
+            clipBehavior: Clip.antiAlias,
+            child: InkWell(
+              onTap: onPressed,
+              child: SizedBox.square(
+                dimension: 53,
+                child: Icon(icon, color: AppColors.primaryDark, size: 27),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
 
 class SwipeDeleteTile extends StatefulWidget {
   final Widget child;
   final VoidCallback onDelete;
   final VoidCallback? onTap;
   final EdgeInsetsGeometry margin;
+  final BorderRadiusGeometry borderRadius;
+  final bool enabled;
 
   const SwipeDeleteTile({
     super.key,
@@ -14,6 +120,8 @@ class SwipeDeleteTile extends StatefulWidget {
     required this.onDelete,
     this.onTap,
     this.margin = const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
+    this.borderRadius = const BorderRadius.all(Radius.circular(16)),
+    this.enabled = true,
   });
 
   @override
@@ -27,59 +135,89 @@ class _SwipeDeleteTileState extends State<SwipeDeleteTile>
   static const _threshold = 24.0;
 
   void _onDragUpdate(DragUpdateDetails d) {
+    if (!widget.enabled) return;
     setState(() => _dx = (_dx + d.delta.dx).clamp(-_maxSlide, 0.0));
   }
 
   void _onDragEnd(DragEndDetails d) {
+    if (!widget.enabled) return;
     setState(() => _dx = _dx < -_threshold ? -_maxSlide : 0);
   }
 
+  void _close() {
+    if (_dx == 0) return;
+    setState(() => _dx = 0);
+  }
+
+  void _delete() {
+    _close();
+    widget.onDelete();
+  }
+
   @override
   Widget build(BuildContext context) {
     final isSwiped = _dx < 0;
     return Padding(
       padding: widget.margin,
-      child: Stack(
-        children: [
-          Positioned.fill(
-            child: Container(
-              decoration: BoxDecoration(
-                color: AppColors.error,
-                borderRadius: BorderRadius.circular(16),
-              ),
-              child: const Align(
-                alignment: Alignment.centerRight,
-                child: Padding(
-                  padding: EdgeInsets.only(right: 20),
-                  child: Icon(
-                    Icons.delete_outline,
-                    color: AppColors.textOnGradient,
-                    size: 28,
-                  ),
+      child: ClipRRect(
+        borderRadius: widget.borderRadius,
+        child: Stack(
+          children: [
+            Positioned.fill(child: ColoredBox(color: AppColors.error)),
+            GestureDetector(
+              behavior: HitTestBehavior.opaque,
+              onTap: isSwiped ? _close : widget.onTap,
+              onHorizontalDragUpdate: widget.enabled ? _onDragUpdate : null,
+              onHorizontalDragEnd: widget.enabled ? _onDragEnd : null,
+              child: Transform.translate(
+                offset: Offset(_dx, 0),
+                child: ColoredBox(
+                  key: const ValueKey('swipe-delete-content-surface'),
+                  color: Colors.white,
+                  child: isSwiped
+                      ? AbsorbPointer(child: widget.child)
+                      : widget.child,
                 ),
               ),
             ),
-          ),
-          GestureDetector(
-            behavior: isSwiped
-                ? HitTestBehavior.opaque
-                : HitTestBehavior.deferToChild,
-            onTap: isSwiped
-                ? () {
-                    widget.onDelete();
-                    setState(() => _dx = 0);
-                  }
-                : widget.onTap,
-            onHorizontalDragUpdate: _onDragUpdate,
-            onHorizontalDragEnd: _onDragEnd,
-            child: Transform.translate(
-              offset: Offset(_dx, 0),
-              child: isSwiped
-                  ? AbsorbPointer(absorbing: true, child: widget.child)
-                  : widget.child,
-            ),
-          ),
-        ],
+            if (isSwiped)
+              Positioned.fill(
+                child: Align(
+                  alignment: Alignment.centerRight,
+                  child: Material(
+                    color: Colors.transparent,
+                    child: InkWell(
+                      key: const ValueKey('swipe-delete-action'),
+                      onTap: widget.enabled ? _delete : null,
+                      child: const SizedBox(
+                        width: _maxSlide,
+                        height: double.infinity,
+                        child: Column(
+                          mainAxisAlignment: MainAxisAlignment.center,
+                          children: [
+                            Icon(
+                              Icons.delete_outline,
+                              color: AppColors.textOnGradient,
+                              size: 24,
+                            ),
+                            SizedBox(height: 2),
+                            Text(
+                              '删除',
+                              style: TextStyle(
+                                color: AppColors.textOnGradient,
+                                fontSize: 12,
+                                fontWeight: FontWeight.w600,
+                              ),
+                            ),
+                          ],
+                        ),
+                      ),
+                    ),
+                  ),
+                ),
+              ),
+          ],
+        ),
       ),
     );
   }