fix: integrations settings squish on mobile (#812) + polish

PhotoProvidersSection:
- Replace raw <input type=checkbox> with TREK's ToggleSwitch so the
  'spiegeln zu Immich'-style options match the rest of the app.
- Wrap action row in flex-wrap so the connected/disconnected badge
  drops to its own line on mobile instead of clipping.
- Add a short 'Test' translation (memories.testShort) shown on mobile
  in place of 'Test connection' — 14 languages kept in sync.

ToggleSwitch:
- Explicit type='button' (never a form submitter), minWidth + flex-
  shrink:0 so the toggle doesn't get squished next to long labels,
  padding:0 so no inherited UA margin warps the inner circle.

MapSettingsTab:
- 'Mapbox' instead of 'Mapbox GL' on narrow screens — the provider
  card is too cramped on mobile for the full name.
- Drop the 'Experimental' badge on mobile entirely; it overlapped
  the title at that width. Still shown on >=sm.

DisplaySettingsTab:
- Time format buttons show just '24h' / '12h' on mobile; the '(14:30)'
  / '(2:30 PM)' hint stays on >=sm. Test updated to match the role
  query since the label is now split across nodes.

client/src/components/Settings/DisplaySettingsTab.test.tsx

@@ -155,7 +155,9 @@ describe('DisplaySettingsTab', () => {
     const updateSetting = vi.fn().mockResolvedValue(undefined);
     seedStore(useSettingsStore, { settings: buildSettings({ time_format: '12h' }), updateSetting });
     render(<DisplaySettingsTab />);
-    await user.click(screen.getByText('24h (14:30)'));
+    // The label is split across a text node ('24h') and a responsive span (' (14:30)').
+    // Click the button that contains the 24h text instead of matching the full string.
+    await user.click(screen.getByRole('button', { name: /24h/ }));
     expect(updateSetting).toHaveBeenCalledWith('time_format', '24h');
   });