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/medication/medication_list_page.dart

@@ -24,23 +24,9 @@ class MedicationListPage extends ConsumerStatefulWidget {
 }
 
 class _MedicationListPageState extends ConsumerState<MedicationListPage> {
-  Future<List<Map<String, dynamic>>>? _future;
   final Set<String> _deleting = {};
 
-  @override
-  void initState() {
-    super.initState();
-    _load();
-  }
-
-  void _load() => setState(() {
-    _future = ref.read(medicationServiceProvider).getMedications('');
-  });
-
-  Future<void> _refresh() async {
-    _load();
-    await _future;
-  }
+  Future<void> _refresh() => ref.refresh(medicationListProvider.future);
 
   Future<void> _confirmDelete(String id, String name) async {
     if (id.isEmpty || _deleting.contains(id)) return;
@@ -68,7 +54,6 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage> {
       await ref.read(medicationServiceProvider).deleteMedication(id);
       ref.invalidate(medicationListProvider);
       ref.invalidate(medicationReminderProvider);
-      _load();
       if (mounted) AppToast.show(context, '用药已删除', type: AppToastType.success);
     } catch (error) {
       if (mounted) {
@@ -97,9 +82,9 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage> {
         tooltip: '添加用药',
         onPressed: () => pushRoute(ref, 'medicationEdit'),
       ),
-      body: AppFutureView<List<Map<String, dynamic>>>(
-        future: _future,
-        onRetry: _load,
+      body: AppAsyncValueView<List<Map<String, dynamic>>>(
+        value: ref.watch(medicationListProvider),
+        onRetry: () => ref.invalidate(medicationListProvider),
         errorTitle: '用药信息加载失败',
         onData: (_, medications) {
           if (medications.isEmpty) {