Completed for 1.2.0 Stable
- 457-family feature/public-contract freeze
- 393/393 published 1.1 families preserved
- Theme and reader runtime smoke tests
- Responsive and Chromium render gates
- Exact Stable archive + internal SHA-256 verification
- Frozen 1.1 pages + 393 specimens run successfully on the 1.2.0 Stable runtime