Add support for forwarding `security-key` and `x-security-key` headers in the
proxy route. The proxy will now automatically inject a security key from
environment variables if it is not already present in the request headers.
Additionally, introduce new test API pages to facilitate debugging and
verifying API responses, including localized country name resolution and
proxy functionality.
- Add `security-key` and `x-security-key` to forwarded headers in proxy
- Implement automatic injection of security key in `src/app/api/proxy/route.ts`
- Add `src/app/[lang]/test-api/page.tsx` for comprehensive API testing
- Add `src/app/test-api/page.tsx` as a root-level redirect/wrapper for the
test API page
Extract geolocation detection and storage logic from `QuestionBirthplace`
and `QuestionPhone` into a new `geo-region.ts` library. This provides a
single source of truth for user region data, including city, country,
and phone calling codes.
- Create `src/lib/geo-region.ts` to manage GeoIP fetching, caching,
and subscription-based updates.
- Refactor `QuestionBirthplace` to use the new `getUserGeoRegion` utility
instead of inline fetch logic.
- Refactor `QuestionPhone` to use the unified storage and retrieval
mechanism for phone calling codes.
- Add unit tests in `ui-config.test.tsx` to verify auto-detection
behavior when `enable_geoip` is enabled.
Adjust the global section overlay transition duration and easing for a
snappier feel. Update the viewport coordinator to use a more responsive
keyboard threshold and provide a fallback default height to ensure
consistent lifting behavior when the last known height is insufficient.
Remove the finally block from the onboarding completion handler in
SliderPage to prevent redundant state updates when errors are already
handled within the catch block.
