Refactor employee management

tests/main_test.go

@@ -73,11 +73,11 @@ func createTestUsers() {
 			Role:     "admin",
 		},
 		{
-			Username: "user1",
+			Username: "employee1",
 			Password: string(testPassword),
-			Name:     "普通用户",
-			Email:    "user1@example.com",
-			Role:     "user",
+			Name:     "普通员工",
+			Email:    "employee1@example.com",
+			Role:     "employee",
 		},
 	}