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/home/home_page.dart

@@ -13,6 +13,7 @@ import '../../providers/auth_provider.dart';
 import '../../providers/chat_provider.dart';
 import '../../providers/data_providers.dart';
 import '../../widgets/health_drawer.dart';
+import '../../widgets/keyboard_lift.dart';
 import '../diet/diet_capture_page.dart';
 import 'widgets/chat_messages_view.dart';
 
@@ -151,6 +152,7 @@ class _HomePageState extends ConsumerState<HomePage>
 
     return Scaffold(
       key: _scaffoldKey,
+      resizeToAvoidBottomInset: false,
       backgroundColor: const Color(0xFFFFFCFF),
       drawer: const HealthDrawer(),
       drawerEnableOpenDragGesture: false,
@@ -178,7 +180,7 @@ class _HomePageState extends ConsumerState<HomePage>
                   ),
                 ),
               ),
-              _buildBottomBar(context),
+              KeyboardLift(child: _buildBottomBar(context)),
             ],
           ),
         ),
@@ -300,7 +302,11 @@ class _HomePageState extends ConsumerState<HomePage>
                         gradient: visual.gradient,
                         borderRadius: BorderRadius.circular(6),
                       ),
-                      child: Icon(visual.icon, size: 13, color: Colors.white),
+                      child: Icon(
+                        visual.icon,
+                        size: 13,
+                        color: visual.iconColor,
+                      ),
                     ),
                     const SizedBox(width: 6),
                     Text(
@@ -321,9 +327,8 @@ class _HomePageState extends ConsumerState<HomePage>
     );
   }
 
-  ({String label, IconData icon, LinearGradient gradient}) _agentVisual(
-    ActiveAgent agent,
-  ) {
+  ({String label, IconData icon, LinearGradient gradient, Color iconColor})
+  _agentVisual(ActiveAgent agent) {
     ({String label, AppModuleVisual visual}) fromModule(
       String label,
       AppModuleVisual visual,
@@ -342,6 +347,7 @@ class _HomePageState extends ConsumerState<HomePage>
         label: module.label,
         icon: module.visual.icon,
         gradient: module.visual.gradient,
+        iconColor: Colors.white,
       );
     }
 
@@ -350,11 +356,13 @@ class _HomePageState extends ConsumerState<HomePage>
         label: 'AI问诊',
         icon: LucideIcons.messageCircle,
         gradient: AppColors.doctorGradient,
+        iconColor: Colors.white,
       ),
       _ => (
         label: 'AI问诊',
         icon: LucideIcons.messageCircle,
         gradient: AppColors.primaryGradient,
+        iconColor: Colors.white,
       ),
     };
   }