fix(plugin-grid): the bulk confirm sentence formats in the display locale

BulkActionDialog reads useDisplayLocale(), the locale the console's
action runners already install, and passes it through bulkConfirmText to
fillTemplateHoles's locale parameter. The bulk confirm sentence's
currency, number and date holes render in the viewer's locale instead of
en-US. No second locale resolution: absent, the engine keeps en-US.

Claude-Session: https://claude.ai/code/session_01SMps7wq7rBTk53e8KTSEup
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

ui/packages/plugin-grid/src/components/BulkActionDialog.tsx

@@ -21,6 +21,7 @@ import {
 } from '@object-ui/components';
 import { AlertTriangle, CheckCircle2, Loader2, XCircle } from 'lucide-react';
 import { useObjectTranslation } from '@object-ui/react';
+import { useDisplayLocale } from '@object-ui/i18n';
 import { getLazyFieldWidget } from '@object-ui/fields';
 // The two shared allow-tables of widgets that are fed the dialog's own
 // in-progress values as their record — one definition each for this dialog, the
@@ -160,6 +161,10 @@ export const BulkActionDialog: React.FC<BulkActionDialogProps> = ({
   skippedCount = 0,
 }) => {
   const { t } = useObjectTranslation();
+  // The viewer's display locale, the one every date, number and currency
+  // renderer and the console's action runners read: the confirm sentence's
+  // formatters render in it (objectstack#26307). ⛔ No second resolution.
+  const displayLocale = useDisplayLocale();
   const params = def?.params ?? [];
 
   // Effective multi-value semantics for an `update` param: an explicit
@@ -410,7 +415,7 @@ export const BulkActionDialog: React.FC<BulkActionDialogProps> = ({
           </DialogTitle>
           {step === 'confirm' && (
             <DialogDescription>
-              {bulkConfirmText(def.confirmText, { count: rows.length, params, values, lookupLabels }) ?? t('grid.bulk.confirmDefault', { count: rows.length, defaultValue: `This will apply to ${rows.length} record(s).` })}
+              {bulkConfirmText(def.confirmText, { count: rows.length, params, values, lookupLabels }, displayLocale) ?? t('grid.bulk.confirmDefault', { count: rows.length, defaultValue: `This will apply to ${rows.length} record(s).` })}
             </DialogDescription>
           )}
         </DialogHeader>

ui/packages/plugin-grid/src/components/bulkConfirmText.ts

@@ -125,12 +125,20 @@ export function bulkConfirmTemplateScope(scope: BulkConfirmScope): Record<string
  * notifications and the single-record `confirmText` render with, so the
  * engine's whitelisted formatters apply (`{{ count | number }}`) and no hole
  * holds logic. A sentence without a `{{ }}` hole is shown as written.
+ *
+ * `locale` is the viewer's display locale, the BCP-47 tag the dialog reads
+ * from `useDisplayLocale()`; the formatters (`currency`, `number`, `date`)
+ * render in it (objectstack#26307). It goes to `fillTemplateHoles`'s own
+ * locale channel, apart from the roots, so a param named `locale` stays a
+ * value the sentence prints. ⛔ No second resolution of it here: absent, the
+ * engine formats in `en-US`.
  */
 export function bulkConfirmText(
   confirmText: BulkActionDef['confirmText'] | null | undefined,
   scope: BulkConfirmScope,
+  locale?: string,
 ): string | undefined {
   const source = bulkConfirmTextSource(confirmText);
   if (source === undefined || !hasTemplateHoles(source)) return source;
-  return fillTemplateHoles(source, bulkConfirmTemplateScope(scope));
+  return fillTemplateHoles(source, bulkConfirmTemplateScope(scope), locale);
 }