fix: 欢迎卡片UI优化 + 蓝牙录入按钮 + 多处修复

- 欢迎卡片：去掉白框圆角错位、图片满宽、按钮去箭头改圆角居中
- 渐变actionOutlineGradient改紫蓝双色循环
- 新增健康Agent"蓝牙录入"按钮→蓝牙设备页
- "查看健康情况"改名"健康概览"
- 饮食编辑框删除bug修复(控制器缓存)
- 启动脚本加adb reverse自动转发
- 登录闪屏修复

health_app/lib/pages/medication/medication_list_page.dart

@@ -55,7 +55,7 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return GradientScaffold(
       appBar: AppBar(
         leading: IconButton(
           icon: const Icon(Icons.arrow_back),
@@ -79,7 +79,7 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
       ),
       floatingActionButton: FloatingActionButton(
         onPressed: () => pushRoute(ref, 'medicationEdit'),
-        backgroundColor: AppColors.primary,
+        backgroundColor: AppColors.primaryDark,
         shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
         child: const Icon(Icons.add, size: 28, color: Colors.white),
       ),
@@ -119,9 +119,9 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
                   child: Container(
                     padding: const EdgeInsets.all(AppTheme.sLg),
                     decoration: BoxDecoration(
-                      color: AppTheme.surface,
-                      borderRadius: BorderRadius.circular(AppTheme.rMd),
-                      border: Border.all(color: AppColors.border),
+                      gradient: AppColors.surfaceGradient,
+                      borderRadius: BorderRadius.circular(AppTheme.rLg),
+                      border: Border.all(color: AppColors.borderLight),
                       boxShadow: AppColors.cardShadowLight,
                     ),
                     child: Row(
@@ -130,15 +130,16 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
                           width: 44,
                           height: 44,
                           decoration: BoxDecoration(
-                            color: AppColors.iconBg,
-                            borderRadius: BorderRadius.circular(AppTheme.rSm),
+                            gradient: isActive
+                                ? AppColors.primaryGradient
+                                : AppColors.surfaceGradient,
+                            borderRadius: BorderRadius.circular(AppTheme.rMd),
+                            border: Border.all(color: AppColors.borderLight),
                           ),
                           child: Icon(
                             Icons.medication_outlined,
                             size: 25,
-                            color: isActive
-                                ? AppColors.primary
-                                : AppTheme.textSub,
+                            color: isActive ? Colors.white : AppTheme.textSub,
                           ),
                         ),
                         const SizedBox(width: AppTheme.sMd),