feat: Add app and API versions

[gcgoncalves]

Pointing to API v1.0.7	Pointing to API v1.0.0

[a-effort]

Great job! 🚀

Non-blocking notes:

vite.config.ts / vitest.config.ts: duplicated define block

The identical define block is added to both config files. If a third build-time constant is introduced later it must be remembered in two places. Consider extracting the shared constants into a small helper (e.g. build-constants.ts) that both configs import, or having vitest.config.ts import and spread the relevant portion of vite.config.ts.

Header.tsx hover card is mouse-only**

<HoverCardTrigger asChild>
  <span className="hidden cursor-default ...">
    v{__APP_VERSION__}
  </span>
</HoverCardTrigger>

Radix does compose onFocus/onBlur onto the child via asChild, so the event wiring is fine, but a plain <span> has no tabIndex and is not in the tab order, so keyboard users can never trigger the popover. Adding tabIndex={0} to the span (or swapping it for an inline-styled <button>) would make it keyboard-accessible.

hover-card.tsx w-72 default:

The component defaults to w-72 in its className, but the only call site immediately overrides it with className="w-auto". No change needed, just fyi if this component is reused elsewhere.