- Bundle BIZ UDPGothic Regular (SIL OFL 1.1) exclusively in solvecraft-web dist
- Remove external jsDelivr CDN fallback; fetch font solely from same-origin ./fonts/
- Fetch Japanese font on-demand only when UI language is set to Japanese
- Gracefully fall back to English UI on fetch failure to prevent tofu glyphs
- Update ATTRIBUTION.md, NOTICE, and THIRD-PARTY-LICENSES.txt
