所有数据库表，提供相应的provider、桥接等方法

apps/im_app/lib/features/chat/di/group_provider.dart

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+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:im_app/app/di/db_provider.dart';
+import 'package:im_app/data/repositories/group_repository_impl.dart';
+import 'package:im_app/domain/entities/group.dart';
+import 'package:im_app/domain/repositories/group_repository.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'group_provider.g.dart';
+
+// ── Repository ────────────────────────────────────────────────────────────────
+
+/// 群组仓储 Provider
+final groupRepositoryProvider = Provider<GroupRepository>((ref) {
+  return GroupRepositoryImpl(ref.watch(storageSdkProvider));
+});
+
+// ── Streams ───────────────────────────────────────────────────────────────────
+
+/// 监听所有群组
+@riverpod
+Stream<List<Group>> allGroups(Ref ref) {
+  return ref.watch(groupRepositoryProvider).watchAll();
+}
+
+/// 监听指定群组
+@riverpod
+Stream<Group?> groupById(Ref ref, int id) {
+  return ref.watch(groupRepositoryProvider).watchById(id);
+}