fix(collab): a note, poll, message or link that cannot be saved offline says it needs a connection

Collab, packing bags, packing templates and imports, the category a place
form creates and the place imports are not kept on the device, so offline
their writes cannot wait in the queue. They failed with a bare "Error" or the
generic save message. While TREK is offline the failure now reads "This needs
a connection. Try again once TREK is back online.", on desktop and on the
phone's Collab notes; online nothing changes.

Refs #2601

client/src/components/Packing/usePackingImport.ts

@@ -2,6 +2,7 @@ import { useMemo, useState, type ChangeEvent } from 'react';
 
 import { packingApi } from '../../api/client';
 import { useTripStore } from '../../store/tripStore';
+import { offlineOr } from '../../utils/needsConnection';
 import { parseImportLines } from './packingListPanel.helpers';
 
 type Translate = (key: string, params?: Record<string, string | number>) => string;
@@ -66,7 +67,7 @@ export function usePackingImport({
       setText('');
       onImported();
     } catch {
-      toast.error(t('packing.importError'));
+      toast.error(offlineOr(t, t('packing.importError')));
     } finally {
       if (oneAtATime) setImporting(false);
     }