后端版本服务器部署成功

backend/src/models/UserMySQL.js

@@ -89,7 +89,7 @@ class UserMySQL {
 
   // 更新密码
   static async updatePassword(id, newPassword) {
-    const sql = 'UPDATE users SET password = ?, updated_at = NOW() WHERE id = ?';
+    const sql = 'UPDATE users SET password_hash = ?, updated_at = NOW() WHERE id = ?';
     const result = await query(sql, [newPassword, id]);
     return result.affectedRows > 0;
   }
@@ -154,25 +154,11 @@ class UserMySQL {
     return rows[0].count > 0;
   }
 
-  // 检查用户名是否已存在
-  static async isUsernameExists(username, excludeId = null) {
-    let sql = 'SELECT COUNT(*) as count FROM users WHERE username = ?';
-    const params = [username];
-
-    if (excludeId) {
-      sql += ' AND id != ?';
-      params.push(excludeId);
-    }
-
-    const rows = await query(sql, params);
-    return rows[0].count > 0;
-  }
-
   // 安全返回用户信息（去除敏感信息）
   static sanitize(user) {
     if (!user) return null;
     
-    const { password, ...safeUser } = user;
+    const { password_hash, ...safeUser } = user;
     return safeUser;
   }
 }