告警中心的二级详情页面+信息中心的页面+对接机器人接口

lib/features/v2/site/presentation/cubit/site_cubit.dart

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+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import '../../../home/domain/entities/site_entity.dart';
+
+class SiteState {
+  final List<SiteEntity> sites;
+  final SiteEntity? selectedSite;
+
+  const SiteState({
+    this.sites = const [],
+    this.selectedSite,
+  });
+
+  SiteState copyWith({
+    List<SiteEntity>? sites,
+    SiteEntity? selectedSite,
+  }) {
+    return SiteState(
+      sites: sites ?? this.sites,
+      selectedSite: selectedSite ?? this.selectedSite,
+    );
+  }
+}
+
+class SiteCubit extends Cubit<SiteState> {
+  final SharedPreferences sharedPreferences;
+  static const String _selectedSiteIdKey = 'selected_site_id';
+
+  SiteCubit(this.sharedPreferences) : super(const SiteState());
+
+  /// 更新场站列表
+  void updateSites(List<SiteEntity> sites) {
+    // 尝试恢复之前选中的场站
+    final savedSiteId = sharedPreferences.getInt(_selectedSiteIdKey);
+    SiteEntity? selectedSite;
+
+    if (savedSiteId != null && sites.isNotEmpty) {
+      selectedSite = sites.firstWhere(
+        (site) => site.id == savedSiteId,
+        orElse: () => sites.first,
+      );
+    } else if (sites.isNotEmpty) {
+      selectedSite = sites.first;
+    }
+
+    emit(state.copyWith(sites: sites, selectedSite: selectedSite));
+  }
+
+  /// 选择场站（持久化）
+  void selectSite(SiteEntity site) {
+    sharedPreferences.setInt(_selectedSiteIdKey, site.id);
+    emit(state.copyWith(selectedSite: site));
+  }
+
+  /// 清除选中场站
+  void clearSelectedSite() {
+    sharedPreferences.remove(_selectedSiteIdKey);
+    emit(state.copyWith(selectedSite: null));
+  }
+
+  /// 清空所有场站数据（退出登录时调用）
+  void clearAll() {
+    sharedPreferences.remove(_selectedSiteIdKey);
+    emit(const SiteState());
+  }
+}