fix: reuse tracking cookie for multiple anonymous submissions

backend/routes/tickets.js

@@ -127,7 +127,8 @@ router.post('/', optionalAuth, upload.array('files', 5), finalizeUpload, validat
   const countRow = await getRow("SELECT COUNT(*) as c FROM tickets WHERE (reporter_game_name = ? OR reporter_game_uid = ?) AND status IN ('pending','processing','awaiting_info','appealing')", [rgn, rgu]);
   if (countRow.c >= 5) return res.status(400).json({ error: '您的待处理/处理中工单已达上限(5个)，请等待已有工单处理完毕后再提交' });
 
-  const trackingToken = uuid();
+  const cookieToken = req.headers.cookie?.split('; ').find(c => c.startsWith('tracking_token='))?.split('=')[1];
+  const trackingToken = cookieToken || uuid();
   const pool = await getPool();
   const conn = await pool.getConnection();
   let ticketId;