# Premium UI implementation validation

Date: 2026-08-02
Branch: `design/mobilityops-premium-ui`

## Implemented scope

- New responsive Control Rail shell, icon system, product mark, top bar, desktop rail,
  off-canvas navigation and labelled mobile bottom navigation.
- Redesigned login, dashboard, fleet, vehicle, bookings, booking return, data quality,
  duplicate review, knowledge, integrations and audit surfaces.
- Return capture now has an explicit review step; no return API request is sent before
  confirmation. The existing idempotency key and local-commit/outbox behavior remain.
- Booking rows are limited to 25 per client-side page; mobile tables keep explicit field
  labels through `data-label` semantics.
- Loading, empty and error surfaces, focus treatment, reduced-motion handling and honest
  integration states are shared system behaviors.

## Visual evidence

Desktop:

![Implemented desktop login](../../artifacts/design-validation/implementation/desktop/login-1440.png)

![Implemented desktop dashboard](../../artifacts/design-validation/implementation/desktop/dashboard-1440.png)

![Implemented return capture](../../artifacts/design-validation/implementation/desktop/booking-return-1440.png)

![Implemented return review](../../artifacts/design-validation/implementation/desktop/booking-return-review-1440.png)

Mobile:

![Implemented mobile login](../../artifacts/design-validation/implementation/mobile/login-390.png)

![Implemented mobile dashboard](../../artifacts/design-validation/implementation/mobile/dashboard-390.png)

![Implemented mobile duplicate review](../../artifacts/design-validation/implementation/mobile/duplicate-review-390.png)

The complete capture set is in `artifacts/design-validation/implementation/`.

## Responsive evidence

Browser evaluation measured the document element after authenticated page render:

| Width | Client width | Scroll width | Result |
|---:|---:|---:|---|
| 390 | 375 (vertical scrollbar present) | 375 | no horizontal overflow |
| 768 | 753 (vertical scrollbar present) | 753 | no horizontal overflow |
| 1280 | 1265 (vertical scrollbar present) | 1265 | no horizontal overflow |
| 1440 | 1425 (vertical scrollbar present) | 1425 | no horizontal overflow |

The same widths are automated in `frontend/e2e/ui-redesign.spec.ts`.

## Performance choices

- No image runtime dependency and no animation library were added.
- Branding, navigation and workflow illustrations are inline SVG/CSS.
- Inter is used only when locally available; there is no blocking font request.
- The production build remains a single small PoC bundle (approximately 239 kB JS and
  37 kB CSS uncompressed at implementation time).