feat: AI 提示词模块化 + AI 同意门控 + AI 草稿存储 + 意图路由 + 医疗引用知识库 + 多页面 UI 优化

- AI 提示词拆分为 markdown 模块（Prompts/global + modules + rag + router）
- 新增 AI 同意门控（用户需同意后才能使用 AI 功能）
- 新增 AI 录入草稿存储（AiEntryDraftContracts/EfAiEntryDraftStore/AiEntryDraftRecord）
- 新增 AI 意图路由（ai_intent_router）
- 新增医疗引用知识库（MedicalCitationKnowledge）
- 重构 prompt_manager 和 ai_chat_endpoints
- 优化聊天/趋势/档案/抽屉/医生端等多个页面 UI
- 新增 agent 插画和趋势指标图标资源
- 删除 HANDOFF-2026-07-17.md

health_app/lib/pages/doctor/doctor_dashboard_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
+import '../../core/app_module_visuals.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
 import '../../providers/backoffice_refresh_providers.dart';
@@ -124,7 +125,7 @@ class DoctorDashboardPage extends ConsumerWidget {
               child: _StatCard(
                 '待审核报告',
                 '${stats['pendingReports'] ?? 0}',
-                Icons.description,
+                AppModuleVisuals.report.icon,
                 const Color(0xFFF59E0B),
                 () {
                   ref.read(doctorPageProvider.notifier).set('reports');
@@ -136,7 +137,7 @@ class DoctorDashboardPage extends ConsumerWidget {
               child: _StatCard(
                 '今日随访',
                 '${stats['todayFollowUps'] ?? 0}',
-                Icons.event_note,
+                AppModuleVisuals.followup.icon,
                 const Color(0xFFEF4444),
                 () {
                   ref.read(doctorPageProvider.notifier).set('followups');
@@ -166,7 +167,7 @@ class DoctorDashboardPage extends ConsumerWidget {
         // 待办：待审核报告
         _TodoSection(
           title: '待审核报告',
-          icon: Icons.description_outlined,
+          icon: AppModuleVisuals.report.icon,
           color: const Color(0xFFF59E0B),
           items:
               (data?['pendingReports'] as List?)
@@ -182,7 +183,7 @@ class DoctorDashboardPage extends ConsumerWidget {
         // 今日随访
         _TodoSection(
           title: '今日随访',
-          icon: Icons.event_note_outlined,
+          icon: AppModuleVisuals.followup.icon,
           color: const Color(0xFFEF4444),
           items:
               (data?['todayFollowUps'] as List?)

health_app/lib/pages/doctor/doctor_followups_page.dart

@@ -1,6 +1,7 @@
-import 'package:flutter/material.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
+import '../../core/app_module_visuals.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
 import '../../providers/backoffice_refresh_providers.dart';
@@ -92,18 +93,18 @@ class _DoctorFollowupsPageState extends ConsumerState<DoctorFollowupsPage> {
         ),
         Expanded(
           child: items.isEmpty && refresh.isLoading
-              ? const BackofficeLoadingState(message: '正在加载随访')
+              ? BackofficeLoadingState(message: '正在加载随访')
               : items.isEmpty && refresh.hasError
               ? BackofficeErrorState(onRetry: () => ref.invalidate(_fupRefresh))
               : RefreshIndicator(
                   onRefresh: () => ref.refresh(_fupRefresh.future),
                   child: items.isEmpty
                       ? ListView(
-                          children: const [
+                          children: [
                             SizedBox(
                               height: 360,
                               child: BackofficeEmptyState(
-                                icon: Icons.event_note_outlined,
+                                icon: AppModuleVisuals.followup.icon,
                                 title: '暂无随访',
                                 description: '新建的复查随访会显示在这里',
                               ),

health_app/lib/pages/doctor/doctor_patient_detail_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
+import '../../core/app_module_visuals.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
 import '../../utils/backoffice_formatters.dart';
@@ -250,7 +251,7 @@ class DoctorPatientDetailPage extends ConsumerWidget {
             Expanded(
               child: _LinkCard(
                 '报告 (${reports.length})',
-                Icons.description_outlined,
+                AppModuleVisuals.report.icon,
                 () {},
               ),
             ),
@@ -258,7 +259,7 @@ class DoctorPatientDetailPage extends ConsumerWidget {
             Expanded(
               child: _LinkCard(
                 '随访 (${followUps.length})',
-                Icons.event_note_outlined,
+                AppModuleVisuals.followup.icon,
                 () {},
               ),
             ),

health_app/lib/pages/doctor/doctor_report_detail_page.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
+import '../../core/app_module_visuals.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
 import '../../providers/backoffice_refresh_providers.dart';
@@ -116,8 +117,8 @@ class _DoctorReportDetailPageState
             onRetry: () => ref.invalidate(_reportDetailProvider(widget.id)),
           ),
           data: (data) => data == null
-              ? const BackofficeEmptyState(
-                  icon: Icons.description_outlined,
+              ? BackofficeEmptyState(
+                  icon: AppModuleVisuals.report.icon,
                   title: '报告不存在',
                 )
               : _buildBody(data),

health_app/lib/pages/doctor/doctor_reports_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/app_colors.dart';
+import '../../core/app_module_visuals.dart';
 import '../../core/navigation_provider.dart';
 import '../../providers/auth_provider.dart';
 import '../../providers/backoffice_refresh_providers.dart';
@@ -71,8 +72,8 @@ class _DoctorReportsPageState extends ConsumerState<DoctorReportsPage> {
                         .where((item) => item['status'] == _filter)
                         .toList();
               return items.isEmpty
-                  ? const BackofficeEmptyState(
-                      icon: Icons.description_outlined,
+                  ? BackofficeEmptyState(
+                      icon: AppModuleVisuals.report.icon,
                       title: '暂无报告',
                       description: '患者上传的待审核报告会显示在这里',
                     )
@@ -93,8 +94,8 @@ class _DoctorReportsPageState extends ConsumerState<DoctorReportsPage> {
                                 color: AppColors.iconBg,
                                 borderRadius: BorderRadius.circular(12),
                               ),
-                              child: const Icon(
-                                Icons.description_outlined,
+                              child: Icon(
+                                AppModuleVisuals.report.icon,
                                 color: AppColors.primary,
                               ),
                             ),