refactor(collab): keep the phone notes tab loading without a trip id guard

The shared notes hook skipped loading and listening without a trip id,
which only the desktop panel did. That guard is now a desktop option, so
the phone tab loads and listens as before.

client/src/components/Collab/CollabNotes.tsx

@@ -43,7 +43,13 @@ function useCollabNotes({ tripId, currentUser }: CollabNotesProps) {
   const can = useCanDo()
   const trip = useTripStore((s) => s.trip)
   const canEdit = can('collab_edit', trip)
-  const { notes, setNotes, loading, uploadNoteFiles } = useCollabNotesData<CollabNote>({ tripId, t, toast, resetOnLoadError: true })
+  const { notes, setNotes, loading, uploadNoteFiles } = useCollabNotesData<CollabNote>({
+    tripId,
+    t,
+    toast,
+    resetOnLoadError: true,
+    waitForTripId: true,
+  })
   const [showNewModal, setShowNewModal] = useState(false)
   const [editingNote, setEditingNote] = useState(null)
   const [viewingNote, setViewingNote] = useState<CollabNote | null>(null)

client/src/components/Collab/useCollabNotesData.test.ts

@@ -1,5 +1,6 @@
 // FE-COLLAB-NOTESDATA-001 to FE-COLLAB-NOTESDATA-008: the note list behind the desktop
-// Collab panel (empties on a failed load) and the phone's notes tab (keeps the list), with
+// Collab panel (empties on a failed load, waits for a trip id) and the phone's notes tab
+// (keeps the list, always loads), with
 // the live note events and the attachment upload both run after saving a note.
 import { act, renderHook, waitFor } from '@testing-library/react';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
@@ -79,11 +80,16 @@ describe('useCollabNotesData', () => {
     expect(empty.result.current.notes).toEqual([]);
   });
 
-  it('FE-COLLAB-NOTESDATA-002: without a trip nothing loads or listens', () => {
-    const { result } = setup({ tripId: 0 });
+  it('FE-COLLAB-NOTESDATA-002: without a trip the desktop list waits, the phone list still loads', async () => {
+    const desktop = setup({ tripId: 0, waitForTripId: true });
     expect(collabApi.getNotes).not.toHaveBeenCalled();
     expect(addListener).not.toHaveBeenCalled();
-    expect(result.current.loading).toBe(true);
+    expect(desktop.result.current.loading).toBe(true);
+
+    const phone = await loaded({ tripId: 0 });
+    expect(collabApi.getNotes).toHaveBeenCalledWith(0);
+    expect(addListener).toHaveBeenCalledTimes(1);
+    expect(phone.result.current.notes.map((n) => n.id)).toEqual([1, 2]);
   });
 
   it('FE-COLLAB-NOTESDATA-003: a failed reload empties the desktop list and keeps the phone list', async () => {

client/src/components/Collab/useCollabNotesData.ts

@@ -12,6 +12,8 @@ export interface CollabNotesDataOptions {
   toast: ReturnType<typeof useToast>;
   /** The desktop panel outlives a trip change, so a failed load there empties the list. */
   resetOnLoadError?: boolean;
+  /** The desktop panel loads and listens only once it has a trip id; the phone tab always does. */
+  waitForTripId?: boolean;
 }
 
 /**
@@ -26,12 +28,13 @@ export function useCollabNotesData<N extends { id: number } = CollabNoteData>({
   t,
   toast,
   resetOnLoadError = false,
+  waitForTripId = false,
 }: CollabNotesDataOptions) {
   const [notes, setNotes] = useState<N[]>([]);
   const [loading, setLoading] = useState(true);
 
   useEffect(() => {
-    if (!tripId) return;
+    if (waitForTripId && !tripId) return;
     let cancelled = false;
     setLoading(true);
     collabApi
@@ -48,10 +51,10 @@ export function useCollabNotesData<N extends { id: number } = CollabNoteData>({
     return () => {
       cancelled = true;
     };
-  }, [tripId, resetOnLoadError]);
+  }, [tripId, resetOnLoadError, waitForTripId]);
 
   useEffect(() => {
-    if (!tripId) return;
+    if (waitForTripId && !tripId) return;
     const handler = (msg: Record<string, unknown>) => {
       // An event still in flight from a trip just left must not land in this list.
       if (String(msg?.tripId) !== String(tripId)) return;
@@ -69,7 +72,7 @@ export function useCollabNotesData<N extends { id: number } = CollabNoteData>({
     };
     addListener(handler);
     return () => removeListener(handler);
-  }, [tripId]);
+  }, [tripId, waitForTripId]);
 
   /**
    * Uploads a saved note's attachments one by one; a file the server refuses is toasted