前端：

1、完善创建群聊逻辑
后端：
1、完善群聊相关接口

backend/IMTest/Service/GroupServiceTest.cs

@@ -11,6 +11,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using MassTransit;
 using IM_API.Configs;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 
 namespace IM_API.Tests.Services
 {
@@ -61,7 +62,9 @@ namespace IM_API.Tests.Services
             });
             await _context.SaveChangesAsync();
 
-            var service = new GroupService(_context, _mapper, _loggerMock.Object, _publishMock.Object);
+            var userService = new Mock<UserService>();
+
+            var service = new GroupService(_context, _mapper, _loggerMock.Object, _publishMock.Object,userService.Object);
 
             // Act (执行测试: 第1页，每页2条，倒序)
             var result = await service.GetGroupListAsync(userId, page: 1, limit: 2, desc: true);
@@ -76,8 +79,10 @@ namespace IM_API.Tests.Services
         [Fact]
         public async Task GetGroupList_ShouldReturnEmpty_WhenUserHasNoGroups()
         {
+
+            var userSerivce = new Mock<UserService>();
             // Arrange
-            var service = new GroupService(_context, _mapper, _loggerMock.Object, _publishMock.Object);
+            var service = new GroupService(_context, _mapper, _loggerMock.Object, _publishMock.Object, userSerivce.Object);
 
             // Act
             var result = await service.GetGroupListAsync(userId: 999, page: 1, limit: 10, desc: false);