v0.1.3 — Brand refresh and OpenGraph fix

Brand / logo pass across CLI help and marketing site.

Changed

• Regenerated ASCII wordmark for CLI --help (stable terminal rendering)
• Compact SVG brand mark on the marketing site
• Logo generation helpers (logo.rb, generate_ascii.py)
• OpenGraph image uses favicon.svg and is published as /opengraph-image.png (WhatsApp-compatible MIME)

Notes

• Homebrew: update formula url / sha256 after this tag
• CLI version: 0.1.3 · site package: 0.1.3

See CHANGELOG.md for details.