b604a80842
- Fix gray map on EN: always use tile.openstreetmap.de (org has rate limits) - Add A11yManager._updateLabels() for live language switch of accessibility panel - Add NotificationCenter._updateLabels() for notification panel translation - Replace all remaining hardcoded de-DE locales with dynamic locale switch - Translate sidebar stats, source discovery toasts, session expiry warning - Translate source form hints, type labels, article progress counter - Add 15+ new translation keys for missing strings Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>