- Add LangManager with 270+ translation keys, anti-flicker lang detection
- Replace all hardcoded German strings in app.js, components.js, dashboard.html, index.html
- Dynamic getter properties for fact-check labels, category badges
- Language-aware map tiles (DE/EN OSM servers), CSP updated for tile.openstreetmap.org
- Lang switcher in header bar and login page
- Locale-aware date formatting, translateApiError for backend messages
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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