Upload: communicate failure, minor frontend updates (#2048)

* (feat:pause-stream) generator exit

* (feat:pause-stream) close request

* (feat:pause-stream) finally close; google anthropic

* (feat:task_status)communicate failure

* (clean:connector) unused routes

* (feat:file-table) missing skeletons

* (fix:apiKeys) build err

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Co-authored-by: GH Action - Upstream Sync <action@github.com>

frontend/src/components/UploadToast.tsx

@@ -37,7 +37,7 @@ export default function UploadToast() {
       case 'completed':
         return t('modals.uploadDoc.progress.completed');
       case 'failed':
-        return t('attachments.uploadFailed');
+        return t('modals.uploadDoc.progress.failed');
       default:
         return t('modals.uploadDoc.progress.preparing');
     }