Revert "🐛 Remove magic numbers"

This reverts commit 33069be.

Author: ljy65535

frontend/services/authService.ts

@@ -36,7 +36,7 @@ export const authService = {
           console.warn("Session verification failed, HTTP status code:", response.status);
 
           // HTTP 401 means the token is expired or invalid
-          if (response.status === STATUS_CODES.UNAUTHORIZED_HTTP) {
+          if (response.status === 401) {
             return null;
           }
 
@@ -84,7 +84,7 @@ export const authService = {
     try {
       const response = await fetch(API_ENDPOINTS.user.serviceHealth, {method: 'GET'});
 
-      return response.status === STATUS_CODES.SUCCESS;
+      return response.status === 200;
     } catch (error) {
       return false;
     }

frontend/types/auth.ts

@@ -2,17 +2,18 @@
  * 认证相关类型与常量定义
  */
 export const STATUS_CODES = {
-  SUCCESS: 200,
+  // 成功状态码
+  SUCCESS: 200,               // 成功
 
-  UNAUTHORIZED_HTTP: 401,
-
-  INVALID_CREDENTIALS: 1002,
-  TOKEN_EXPIRED: 1003,
-  UNAUTHORIZED: 1004,
-  INVALID_INPUT: 1006,
-  AUTH_SERVICE_UNAVAILABLE: 1007,
-
-  SERVER_ERROR: 1005,
+  // 客户端错误状态码
+  INVALID_CREDENTIALS: 1002,  // 无效的登录凭证
+  TOKEN_EXPIRED: 1003,        // Token已过期
+  UNAUTHORIZED: 1004,         // 未授权操作
+  INVALID_INPUT: 1006,        // 无效的输入参数
+  AUTH_SERVICE_UNAVAILABLE: 1007, // 认证服务不可用
+  
+  // 服务器错误状态码
+  SERVER_ERROR: 1005,         // 服务器内部错误
 };
 
 // 本地存储键