1）修改数据库命名，不和业务使用重合。

2）修改user 表，uid为unique, 聊天室文件夹name unique移除

apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart

@@ -1,7 +1,6 @@
 import 'dart:math';
 
 import 'package:drift/drift.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:im_app/app/di/db_provider.dart';
 import 'package:im_app/data/local/drift/app_database.dart';
@@ -87,12 +86,12 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
       final chunk = List.generate(
         chunkSize.clamp(0, count - i),
             (j) => UsersCompanion.insert(
-          uid: Value(i + j),
+          uid: i + j,
           nickname: Value('User ${i + j}'),
         ),
       );
 
-      await db.batchInsertOrReplace<User>(chunk);
+      await db.batchInsertOrReplace<DriftUser>(chunk);
       completed += chunk.length;
 
       // 让出主线程