fix(preview): refine page slice breaking and height calculation for multi-page resumes

feat(export): switch resume export/import from PDF to DOCX

feat(ai): add StreamCleaner to clean suggestions output and improve prompt instructions

Update Modern Blue template design and add Job Title input field

Fix resume design customization edits not applying and implement auto-save

secure: remove temporary test-keys debugging endpoint

debug: add test-keys endpoint to verify API key presence and responses on Hugging Face

fix: implement rapid failover circuit-breaker routing and OpenRouter streaming fallback to make AI suggestions instant and robust

fix: update Grok and OpenRouter model targets and set max_tokens to prevent 402/payment limit errors

fix: resolve PDF left-clipping issue in html2canvas capture

Update OpenRouter free model

Auto seed database on startup for Hugging Face

Initial commit with LFS enabled