feat: AI 意图路由/草稿存储 + Prompts 模块化 + UI 视觉统一 + AI 同意门 + 资源更新

后端:
- 新增 ai_intent_router 意图路由
- 新增 AiEntryDraft 草稿存储 + EF 迁移
- 新增 Prompts 模块化（global/modules/rag/router）
- AI Agent handlers 扩展

前端:
- 新增 AI 同意门 (ai_consent_gate/provider/details_page)
- HealthMetricVisuals 视觉统一
- 设备扫描/管理页面优化
- agent 插图替换 + 趋势指标图标

配置:
- DeepSeek 模型改 deepseek-v4-flash
- .gitignore 加 artifacts/audit
- build.gradle.kts 签名配置调整

health_app/lib/core/api_client.dart

@@ -9,7 +9,7 @@ const String baseUrl = String.fromEnvironment(
   'API_BASE_URL',
   defaultValue: kReleaseMode
       ? 'https://erpapi.datalumina.cn/xiaomai'
-      : 'http://10.4.178.175:5000',
+      : 'http://10.4.225.209:5000',
 );
 
 class ApiException implements Exception {

health_app/lib/core/app_module_visuals.dart

@@ -168,3 +168,20 @@ class AppModuleVisuals {
 
   static AppModuleVisual of(AppModule module) => values[module] ?? ai;
 }
+
+/// 健康概览及所有健康指标卡片共用的图标与颜色。
+class HealthMetricVisuals {
+  HealthMetricVisuals._();
+
+  static const bloodPressureIcon = Icons.bloodtype_outlined;
+  static const heartRateIcon = LucideIcons.heartPulse;
+  static const glucoseIcon = Icons.water_drop_outlined;
+  static const spo2Icon = Icons.air_outlined;
+  static const weightIcon = Icons.monitor_weight_outlined;
+
+  static const bloodPressureColor = Color(0xFF8B5CF6);
+  static const heartRateColor = Color(0xFFF43F5E);
+  static const glucoseColor = Color(0xFFF59E0B);
+  static const spo2Color = Color(0xFF0EA5E9);
+  static const weightColor = Color(0xFF10B981);
+}

health_app/lib/core/app_router.dart

@@ -13,6 +13,7 @@ import '../pages/consultation/consultation_pages.dart';
 import '../pages/settings/settings_pages.dart';
 import '../pages/settings/elder_mode_page.dart';
 import '../pages/settings/notification_prefs_page.dart';
+import '../pages/settings/ai_consent_details_page.dart';
 import '../pages/notifications/notification_center_page.dart';
 import '../pages/history/conversation_history_page.dart';
 import '../pages/profile/profile_page.dart';
@@ -132,6 +133,8 @@ Widget buildPage(RouteInfo route, WidgetRef ref) {
       return const ElderModePage();
     case 'notificationPrefs':
       return const NotificationPrefsPage();
+    case 'aiConsentDetails':
+      return const AiConsentDetailsPage();
     case 'notifications':
       return const NotificationCenterPage();
     case 'conversationHistory':