所有数据库表，提供相应的provider、桥接等方法

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

@@ -0,0 +1,29 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:im_app/app/di/db_provider.dart';
+import 'package:im_app/data/repositories/chat_repository_impl.dart';
+import 'package:im_app/domain/entities/chat.dart';
+import 'package:im_app/domain/repositories/chat_repository.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'chat_provider.g.dart';
+
+// ── Repository ────────────────────────────────────────────────────────────────
+
+/// 聊天仓储 Provider
+final chatRepositoryProvider = Provider<ChatRepository>((ref) {
+  return ChatRepositoryImpl(ref.watch(storageSdkProvider));
+});
+
+// ── Streams ───────────────────────────────────────────────────────────────────
+
+/// 监听所有聊天
+@riverpod
+Stream<List<Chat>> allChats(Ref ref) {
+  return ref.watch(chatRepositoryProvider).watchAllChats();
+}
+
+/// 监听指定聊天
+@riverpod
+Stream<Chat?> chat(Ref ref, int id) {
+  return ref.watch(chatRepositoryProvider).watchChat(id);
+}