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/consultation/consultation_pages.dart

@@ -4,6 +4,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
 import '../../core/app_theme.dart';
 import '../../providers/consultation_provider.dart';
+import '../../widgets/keyboard_lift.dart';
 
 /// 问诊对话页 — 完整的 AI 分身聊天界面
 class DoctorChatPage extends ConsumerStatefulWidget {
@@ -62,6 +63,7 @@ class _DoctorChatPageState extends ConsumerState<DoctorChatPage> {
     final canSend = state.status == 'AiTalking' && !state.isSending;
 
     return GradientScaffold(
+      resizeToAvoidBottomInset: false,
       appBar: AppBar(
         backgroundColor: Colors.transparent,
         title: Column(
@@ -113,7 +115,7 @@ class _DoctorChatPageState extends ConsumerState<DoctorChatPage> {
           : Column(
               children: [
                 Expanded(child: _buildMessageList(state)),
-                _buildInputBar(canSend),
+                KeyboardLift(child: _buildInputBar(canSend)),
               ],
             ),
     );