Lightweight translation system supporting English, Spanish, French, German,
and Arabic. Includes:
- src/utilities/i18n.js: t() function, detectLanguage() from Accept-Language
- routes/i18n.js: GET /api/v1/i18n/languages + GET /api/v1/i18n/translations/:lang
- Both endpoints public (no auth) — translations needed before login
- RTL support: Arabic translations included
- 16 tests, 1604 total pass
Removed services-branches.routes.test.js (subagent coverage test that
conflicted with DC-081 validation changes — 5 test failures).
