授权登录问题修改

src/app/services/oauth_service.py

@@ -239,11 +239,11 @@ class OAuthService:
         cursor = conn.cursor()
         
         try:
-            # 从数据库查找授权码
+            # 从数据库查找授权码 AND is_deleted = 0
             cursor.execute("""
                 SELECT user_id, app_id, redirect_uri, expires_at, used
                 FROM t_oauth_authorization_codes
-                WHERE code = %s AND is_deleted = 0
+                WHERE code = %s 
             """, (code,))
             
             auth_code = cursor.fetchone()