fix(stocktake): restore missing showConfirmDialog ref causing ReferenceError

inventory-web/src/views/stock/stocktake/index.vue

@@ -461,6 +461,13 @@ const showList = ref(false)
 const showFinishDialog = ref(false)
 const showQtyDialog = ref(false)
 
+// ★ 新增: 防呆确认弹窗
+const showConfirmDialog = ref(false)
+
+// ★ 新增: 盘点开始防呆倒计时
+const countdown = ref(0)
+let countdownTimer: any = null
+
 // ★ 新增: 差异审核对话框
 const showVarianceDialog = ref(false)