0.30.0 — Fable UI Themes · Kandown changelog

Added: Customizable JSON Theme Engine (KandownTheme) — upgraded Kandown's skin system from 5 hardcoded HSL presets to an open, JSON-driven theme engine with dynamic inheritance (base), fallback safety, and runtime custom theme registration (registerCustomThemes).
Added: 8 Curated Built-in Presets — introduced 8 design presets in src/lib/theme.ts:
- ⚡ Vercel: Monochrome contrast, tight typography, 6px radius, sharp 1px borders, zero shadows.
- 📐 Linear: Dark-first (#08090A), electric violet (#5E6AD2), 8px radius, glass header, soft popover shadows.
- 🧡 Claude: Editorial warmth, oat crème (#F5F1EA), terracotta accent (#D97757), Charter serif display font, 12px radius, soft diffuse shadows.
- 🍎 Apple: Translucent materials (rgba(255,255,255,0.72) + backdrop blur), SF system font, 14px squircle radius, multi-layer elevated shadows.
- 💳 Stripe: Indigo night (#0A0A23), blurple accent (#635BFF), 8px radius, soft colored glow shadows.
- 📄 Paper: Notion-style calm studio, #F7F6F3 light, #191919 dark, pastel tags, 4px radius, no shadows.
- 🧛 Catppuccin: Official Mocha (#1E1E2E mauve #CBA6F7) and Latte palettes.
- 🖥️ Terminal: CRT homage to TUI, #0C0C0C background, #33FF66 phosphor green text, SF Mono everywhere, 0px radius.
Added: Theme Gallery with Live Mini-Board Previews — replaced static color swatches in Settings with an interactive gallery of ThemePreviewCard components rendering isolated live 3-column kanban board previews using each theme's unique HSL tokens, radius, fonts, and shadows.
Added: Visual Theme Editor Modal (ThemeCustomizerModal) — added a visual customization drawer for creating and tweaking custom JSON themes with sliders for border radius (0–24px), shadow elevation levels (none, soft, elevated, dramatic), density, motion scale, glassmorphism, and live HSL token pickers.
Added: Live WCAG 2.1 Contrast Ratio Calculator — added real-time relative luminance calculation in the theme editor showing an active WCAG AA contrast ratio badge (warning when ratio < 4.5:1).
Added: JSON Import & Export — added direct theme JSON view/edit panel with 1-click clipboard copy for sharing and storing custom themes.
Added: ui.customThemes Config Support — custom user themes are automatically persisted in kandown.json under ui.customThemes and loaded seamlessly on startup.
Changed: Appearance CSS Tokens & Design Refinements — introduced --radius, --shadow-*, --font-display, --motion-scale, --card-blur variables into :root and mapped them to tailwind.config.js (borderRadius, fontFamily.display). Refined base body typography scale to 15px, unified focus rings (:focus-visible), and added smooth light/dark root transitions.