refactor(admin): 优化管理员认证接口命名

- 将 AdminAuthController 类的 @Api 注解中的 tags 属性从 "管理员认证接口"修改为 "管理员认证"
- 删除了未使用的 AdminController 类

src/main/java/com/example/admin_server/controller/admin/AdminAuthController.java

@@ -23,7 +23,7 @@ import java.util.Optional;
 @RestController
 @RequestMapping("/api/admin/auth")
 @RequiredArgsConstructor
-@Api(tags = {"管理员认证接口"})
+@Api(tags = {"管理员认证"})
 public class AdminAuthController {
 
     private final AdminMapper adminMapper;

src/main/java/com/example/admin_server/controller/admin/AdminController.java

@@ -1,13 +0,0 @@
-package com.example.admin_server.controller.admin;
-
-import io.swagger.annotations.Api;
-import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/api/admin")
-@RequiredArgsConstructor
-@Api(tags = {"管理员接口"})
-public class AdminController {
-}