Mark phase 1 MVP tasks 11.6-11.8 complete

- 11.6: i18n wired up in both apps (PR #44)
- 11.7: Responsive layout breakpoints added (PR #45)
- 11.8: Deployed to Hetzner, both apps live at trails.cool

All 11 task groups in phase 1 MVP are now complete.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

openspec/changes/phase-1-mvp/tasks.md

@@ -112,6 +112,6 @@
 - [x] 11.3 End-to-end test: Import GPX → view route on map → export GPX
 - [x] 11.4 Test BRouter routing with Germany segments (Berlin → Munich route)
 - [x] 11.5 Test session expiry and manual close
-- [ ] 11.6 Verify i18n works (English and German)
-- [ ] 11.7 Basic responsive layout testing (desktop, tablet)
-- [ ] 11.8 Deploy to Hetzner and verify production setup
+- [x] 11.6 Verify i18n works (English and German)
+- [x] 11.7 Basic responsive layout testing (desktop, tablet)
+- [x] 11.8 Deploy to Hetzner and verify production setup