fix(formplayer): localize progress bar navigation labels

[Lemeri123]

Summary

The progress-bar chevrons now use the same ODE UI locale as the rest of Formplayer.

Short description of what changed

In FormProgressBar.tsx, useOdeT() reads the active locale from FormplayerLocaleContext and looks up nav.previousScreen / nav.nextScreen. English fallbacks stay "Previous screen" and "Next screen". Layout, clicks, and disabled states are unchanged. Locale catalog files were not edited.

useOdeT re-renders when the locale changes because it calls useContext(FormplayerLocaleContext). App.tsx puts that provider around the form UI with uiLocale from params.locale. A new locale value makes context consumers re-render, so odeT(locale, key, fallback) runs against the matching en / pt / fr catalog.

Type of Change

• Bug fix
• New feature / enhancement
• Refactor / cleanup
• Documentation
• Chore / other

Component(s) Changed

• formulus-formplayer (form WebView UI)
• formulus (React Native mobile app)
• formulus-formplayer (form WebView UI)
• synkronus (Go backend)
• synkronus-cli (command-line client)
• synkronus-portal (web admin UI)

Testing

• Added/updated tests
• Added/updated tests
• Manually tested

Existing English getByLabelText checks still pass because the helper defaults to 'en'. A new case wraps the bar in FormplayerLocaleContext.Provider with 'pt' and asserts Ecrã anterior / Ecrã seguinte (catalog strings, not duplicates). There was no shared i18n test helper; this reuses the same Provider the app already uses.

Checklist

• Pre-flight checks for changed packages passed (lint / format / tests)
  Verification (from formulus-formplayer/):
  pnpm run lint
  pnpm run format:check
  pnpm test run 220 tests, including 6 in FormProgressBar.test.tsx
  pnpm run build

• Related issue linked, closes fix(formplayer): localize progress bar navigation labels #907

[Mishael-2584]

LGTM, good work @Lemeri123

[IamLRBA]

Good work done Lemeri-Boy!

[Lemeri123]

Thanks @IamLRBA @Mishael-2584