清除无效代码，调整token需求

plugins/jd_sign_token/main.py

@@ -219,6 +219,13 @@ class JDTokenPlugin(MessagePluginInterface):
         # 提取token和备注
         token = match.group(1)
         remark = match.group(2)
+        
+        # 简单预检查token格式
+        if not token.startswith("pt_key=") or "pt_pin=" not in token:
+            await bot.send_text_message((roomid if roomid else sender), 
+                                       f"❌ Token格式错误！正确格式应为：pt_key=xxx; pt_pin=xxx;", 
+                                       sender)
+            return False, "Token格式错误"
 
         try:
             # 设置京东Token