Add e2e and unit tests for i18n coverage and POS workflows:

- Introduced i18n key usage validation with `tests/e2e/i18n.views.spec.ts` for deterministic locale coverage.
- Added `viewI18nKeyScanner` utility to scan and validate view translation keys.
- Created `PosDepartmentStep1` unit tests for duplicate warnings and booking selection flow.
- Enhanced POS mobile popup with `SelectOrderBookingPopupProps` and new header close options.
- Updated e2e tests with scenarios to verify booking selections, duplicate handling, and locale alignment.
- Added new `test:e2e:i18n:views` npm script for targeted i18n test execution.

src/i18n/locales/da.json

@@ -340,6 +340,7 @@
       "details": "Detaljer",
       "download": "Last ned",
       "duplicate_order_warning": "Er du sikker på, at dette ikke allerede er oprettet? Mulige dubletter af denne ordre er fundet. Du kan fortsætte med at oprette ordren eller se ordredetaljer.",
+      "hide_order_details": "Skjul ordredetaljer",
       "duplicates": {
         "subtitle": "Håndter dubletter",
         "title": "Dubletter"