fix: 配比秤已完成订单不再显示"全部完成"按钮

已完成状态仅保留状态徽章，去掉冗余的不可用按钮。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

other-module/canteen-device/ratio-scale/01-packing-tasks.html

@@ -270,7 +270,7 @@
           '<span class="task-card__arrival">&#x23F0; 期望到货：<span class="task-card__arrival__time">' + order.expectedArrival + '</span></span>' +
           '<span class="task-card__status"><span class="status-badge ' + (orderAllDone ? 'status-badge--done' : 'status-badge--pending') + '">' + (orderAllDone ? '已完成' : '待配比') + '</span></span>' +
           (orderAllDone
-            ? '<button class="task-card__pack-btn" disabled>全部完成</button>'
+            ? ''
             : '<button class="task-card__pack-btn" onclick="handleWeigh(\'' + order.taskNo + '\',\'' + order.orderNo + '\')">去配比</button>');
         taskCard.appendChild(header);