Accessibility pass on forms and navigation

[iexwr]

Context

The app has no explicit a11y handling; keyboard and screen-reader users are not served.

Acceptance criteria

• All inputs have associated <label> / aria-label.
• Focus moves logically; focus-visible styles exist (Tailwind focus-visible).
• Status badges use text + color (not color alone).
• An aria-live region announces toasts/errors.

Technical notes

• Audit with a manual keyboard pass; no new heavy deps.

Testing

• Add at least one test asserting a labelled control and one for the live region.