feat(journey): let quick capture take a note, not just a photo

The ask was "photos or quick notes" while travelling, and the capture sheet only
took photos (#1614) — so a moment worth catching without a picture had no way in
short of opening the full editor, which is exactly what capture mode exists to
avoid.

Two rows rather than the full sheet's three: this is a note, not the story. The
story is written later, when the entry is finished.

client/src/mobile/screens/journey/MJourneyEntrySheet.tsx

@@ -585,6 +585,20 @@ export default function MJourneyEntrySheet({
           </div>
         )}
 
+        {/* Quick capture keeps a note field: the ask was "photos *or* quick notes"
+            unterwegs, and a moment without a picture is still worth catching. Two
+            rows rather than three — it is a note, not the story, which is written
+            later in the full sheet. */}
+        {captureOnly && !readOnly && (
+          <textarea
+            rows={2}
+            value={story}
+            onChange={e => setStory(e.target.value)}
+            placeholder={t('journey.editor.writeStory')}
+            className={`mt-[10px] w-full resize-none px-[14px] py-3 font-geist text-[0.8125rem] leading-[1.5] text-m-ink outline-none placeholder:text-m-faint ${fieldShell} rounded-[14px]`}
+          />
+        )}
+
         {!captureOnly && <>
           {readOnly ? (
             story && (

client/tests/unit/mobile/journey/MJourneyEntrySheet.test.tsx

@@ -48,6 +48,24 @@ describe('MJourneyEntrySheet quick capture', () => {
     });
   });
 
+  // #1614 — the ask was "photos *or* quick notes" while travelling, and a moment
+  // without a picture is still worth catching.
+  it('takes a note in capture mode and saves it', async () => {
+    vi.spyOn(mapsApi, 'reverse').mockResolvedValue({ name: 'Singapore', address: 'Singapore' });
+    const { props } = setup();
+
+    const note = await screen.findByPlaceholderText('Write your story...');
+    fireEvent.change(note, { target: { value: 'Ferry was late, worth it' } });
+    fireEvent.click(screen.getByRole('button', { name: 'Save' }));
+
+    await waitFor(() =>
+      expect(props.onSave).toHaveBeenCalledWith(
+        expect.objectContaining({ story: 'Ferry was late, worth it' }),
+        undefined,
+      ),
+    );
+  });
+
   it('captures GPS, reverse-geocodes it, detects an editable weather category, and saves', async () => {
     vi.spyOn(mapsApi, 'reverse').mockResolvedValue({ name: 'Singapore', address: 'Singapore' });
     vi.spyOn(weatherApi, 'getCurrent').mockResolvedValue({