v0.4.0 — Theme Presets & Launch Website

New Features

• Editor Theme Presets — Added full typographic voice presets for customizing the editor's look and feel
• Launch Website — Built the Quartz marketing site with a 3D crystal hero, v2 landing page, and full-page editor demo
• Website Tooling — Added build, lint, and format scripts with ESLint config for the website

Bug Fixes

• Slash Menu Fixes — Fixed backspace handling and upward shrink direction in the slash menu
• Viewport-Aware Positioning — Slash menu and code block dropdown now reposition to stay within the viewport
• Comprehensive Codebase Review — Resolved 15 issues across parser, serializer, editor, and build
• Image Security — Added URL validation for image sources (defense-in-depth) and allowed external HTTPS images to load
• Website Fixes — Fixed demo editor, GitHub link, and added website URL to READMEs
• React Doctor — Resolved all react-doctor issues and fixed broken tests

Maintenance

• Removed dead code and added knip config for 100/100 react-doctor score
• Updated all links from quartz-editor.pages.dev to quartz-editor.dev
• Removed v1 website assets and consolidated v2 landing page
• Removed automated publish job from CI workflow
• Updated marketplace badge URL and added useful links doc
• Added editor visual polish design doc and implementation issues