fix(query-tool): export all selected CIDs instead of single, fix hold detail float precision

Export was sending only one container_id while the detail table loaded
data for all selected CIDs (including subtree), causing "查無資料" errors.
Now sends container_ids array and uses batch service functions.

Also rounds hold detail age KPI cards to 1 decimal place.

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

frontend/src/hold-detail/components/SummaryCards.vue

@@ -17,7 +17,8 @@ function formatAge(value) {
   if (value === null || value === undefined || value === '-') {
     return '-';
   }
-  return `${value}天`;
+  const num = Number(value);
+  return `${Number.isFinite(num) ? num.toFixed(1) : value}天`;
 }
 </script>
 

frontend/src/query-tool/composables/useLotDetail.js

@@ -378,9 +378,9 @@ export function useLotDetail(initial = {}) {
   async function exportSubTab(tab) {
     const normalized = normalizeSubTab(tab);
     const exportType = EXPORT_TYPE_MAP[normalized];
-    const containerId = selectedContainerId.value;
+    const cids = getActiveCids();
 
-    if (!exportType || !containerId) {
+    if (!exportType || cids.length === 0) {
       return false;
     }
 
@@ -389,7 +389,7 @@ export function useLotDetail(initial = {}) {
 
     try {
       const params = {
-        container_id: containerId,
+        container_ids: cids,
       };
 
       if (normalized === 'jobs') {