v0.1.0

Added

• Browser-local editor for DMG background artwork and Finder item positions.
• Versioned Schema 1 layout document and five-member ZIP export contract.
• Native Rust, WASM, real Chromium, documentation, supply-chain, and Pages
  quality gates.
• English documentation with Chinese entry points.

Changed

• Updated ZIP export to zip 7.2.0 while retaining standard Deflate output
  through the explicit flate2 backend.