feat: 三端抽屉重构 + 配色系统更新 + 后台管理页精调 + 键盘抬起组件

## 抽屉重构
- admin_drawer / doctor_drawer / health_drawer 三端抽屉全部重做
- drawer_shell 增强

## 配色系统
- app_colors / app_module_visuals / app_theme 更新
- app.dart 启动流程调整

## 后台管理页
- admin_doctors_page 大幅重构(+251)
- admin_home / doctor_dashboard / doctor_reports / doctor_home / doctor_followups / doctor_settings 精调

## 患者端
- home_page / chat_messages_view / medication_list / notification_center / remaining_pages / exercise_plan / device / diet / consultation 微调

## 新增
- keyboard_lift.dart: 键盘抬起处理组件
- AGENTS.md: agent 指引文档

## 其他
- api_client IP 适配
- app_future_view 增强
- data_providers 调整
- secondary_page_visuals_test 更新

health_app/lib/pages/device/device_management_page.dart

@@ -425,9 +425,9 @@ class _DeviceManagementPageState extends ConsumerState<DeviceManagementPage>
               onPressed: () => pushRoute(ref, 'deviceScan'),
               style: IconButton.styleFrom(
                 backgroundColor: Colors.white,
-                foregroundColor: AppColors.primaryDark,
+                foregroundColor: AppColors.device,
                 fixedSize: const Size(40, 40),
-                side: const BorderSide(color: AppColors.primaryLight),
+                side: const BorderSide(color: AppColors.deviceBorder),
                 shape: const CircleBorder(),
               ),
               icon: const Icon(Icons.add_rounded),
@@ -604,10 +604,10 @@ class _DevicesHeader extends StatelessWidget {
             width: 50,
             height: 50,
             decoration: BoxDecoration(
-              color: _deviceVisual.lightColor,
+              color: AppColors.device,
               borderRadius: AppRadius.smBorder,
             ),
-            child: Icon(_deviceVisual.icon, color: AppColors.device, size: 27),
+            child: Icon(_deviceVisual.icon, color: Colors.white, size: 27),
           ),
           const SizedBox(width: 14),
           Expanded(
@@ -671,14 +671,10 @@ class _DeviceSection extends StatelessWidget {
                     width: 34,
                     height: 34,
                     decoration: BoxDecoration(
-                      color: _deviceVisual.lightColor,
+                      color: AppColors.device,
                       borderRadius: AppRadius.smBorder,
                     ),
-                    child: Icon(
-                      type.icon,
-                      size: 19,
-                      color: _deviceVisual.color,
-                    ),
+                    child: Icon(type.icon, size: 19, color: Colors.white),
                   ),
                   const SizedBox(width: 10),
                   Text(
@@ -733,7 +729,6 @@ class _BoundDeviceTile extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final accent = connected ? AppColors.successText : AppColors.textHint;
     final availability = deviceSyncAvailabilityLabel(device.type);
     return AnimatedContainer(
       duration: const Duration(milliseconds: 180),
@@ -750,10 +745,10 @@ class _BoundDeviceTile extends StatelessWidget {
             width: 42,
             height: 42,
             decoration: BoxDecoration(
-              color: connected ? AppColors.successLight : AppColors.deviceLight,
+              color: AppColors.device,
               borderRadius: AppRadius.smBorder,
             ),
-            child: Icon(device.type.icon, color: accent, size: 22),
+            child: Icon(device.type.icon, color: Colors.white, size: 22),
           ),
           const SizedBox(width: 12),
           Expanded(