业务更新User所需（企业成员、聊天室群组成员）

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

@@ -87,7 +87,7 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
     _loadNextPage();
   }
 
-  // ── 测试 ──────────────────────────────────────────────────────────────────
+  // ── 测试：插入 ────────────────────────────────────────────────────────────
 
   void startDBTest(BuildContext context) {
     _isTesting = true;
@@ -147,4 +147,67 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
       );
     }
   }
+
+  // ── 测试：更新 ────────────────────────────────────────────────────────────
+
+  void updateFirst10(BuildContext context) {
+    _testDBUpdate();
+  }
+
+  Future<void> _testDBUpdate() async {
+    final useCase = ref.read(updateUsersUseCaseProvider);
+    final users = state.users;
+
+    if (users.isEmpty) {
+      state = state.copyWith(currentState: '暂无数据，请先插入');
+      return;
+    }
+
+    final updated = await useCase.execute(users);
+
+    if (ref.mounted) {
+      final updatedMap = {for (final u in updated) u.uid: u};
+      final updatedList = state.users
+          .map((u) => updatedMap[u.uid] ?? u)
+          .toList();
+
+      state = state.copyWith(
+        users: updatedList,
+        currentState: '已更新前 ${updated.length} 条',
+      );
+    }
+  }
+
+  // ── 测试：删除 ────────────────────────────────────────────────────────────
+
+  void deleteFirst10(BuildContext context) {
+    _testDBDelete();
+  }
+
+  Future<void> _testDBDelete() async {
+    final useCase = ref.read(deleteUsersUseCaseProvider);
+    final repo = ref.read(userRepositoryProvider);
+    final users = state.users;
+
+    if (users.isEmpty) {
+      state = state.copyWith(currentState: '暂无数据，请先插入');
+      return;
+    }
+
+    final deleted = await useCase.execute(users);
+
+    if (ref.mounted) {
+      final deletedUids = {for (final u in deleted) u.uid};
+      final updatedList = state.users
+          .where((u) => !deletedUids.contains(u.uid))
+          .toList();
+
+      final total = await repo.countUsers();
+      state = state.copyWith(
+        users: updatedList,
+        totalCount: total,
+        currentState: '已删除前 ${deleted.length} 条',
+      );
+    }
+  }
 }