v1.0.0

🎉 v1.0.0 — Full Rewrite

从 vanilla JS 全面重构为现代前端架构。

Changed

• Full rewrite from vanilla JS to Next.js 16 + TypeScript
• UI rebuilt with shadcn/ui + Tailwind CSS v4
• State management via Zustand
• Watermark rendering extracted to pure functions
• Top-down layout: full-width preview above, controls below in responsive grid
• Brand color updated to teal/cyan; consistent light & dark themes
• Favicon now matches header logo (Lucide Droplets SVG)

Added

• Dark mode toggle
• Real-time canvas preview with requestAnimationFrame debouncing
• Image validation with toast error feedback
• Dual deployment: Vercel (default) + Cloudflare Pages (static export)

Removed

• Legacy index.html / css/ / js/ vanilla implementation
• CDN dependencies (Bootstrap, Font Awesome, FileSaver.js)
• Unused shadcn/ui components and shadcn runtime dependency

Full Changelog: a0bf23a...v1.0.0