feat: V1 prototype — Vite/React/TS tileset generator

- Scaffold: package.json, tsconfig.json, vite.config.ts, index.html
- src/lib/imageProcessor.ts: full pipeline (normalize, offset, seam repair, export, validation)
- src/components/UploadPanel.tsx: drag-and-drop, file picker, clipboard paste
- src/components/SettingsPanel.tsx: all controls per spec
- src/components/PreviewPanel.tsx: Original / Tileable / Repeated tabs
- src/components/ErrorBanner.tsx: dismissible error/warning banners
- src/App.tsx: root component wiring everything together
- src/index.css: dark premium glassmorphism theme w/ Inter font

node_modules/update-browserslist-db/README.md

@@ -0,0 +1,30 @@
+# Update Browserslist DB
+
+<img width="120" height="120" alt="Browserslist logo by Anton Popov"
+     src="https://browsersl.ist/logo.svg" align="right">
+
+CLI tool to update `caniuse-lite` with browsers DB
+from [Browserslist](https://github.com/browserslist/browserslist/) config.
+
+Some queries like `last 2 versions` or `>1%` depend on actual data
+from `caniuse-lite`.
+
+```sh
+npx update-browserslist-db@latest
+```
+Or if using `pnpm`:
+```sh
+pnpm exec update-browserslist-db latest
+```
+Or if using `yarn`:
+```sh
+yarn dlx update-browserslist-db@latest
+```
+
+<a href="https://evilmartians.com/?utm_source=update-browserslist-db">
+  <img src="https://evilmartians.com/badges/sponsored-by-evil-martians.svg"
+       alt="Sponsored by Evil Martians" width="236" height="54">
+</a>
+
+## Docs
+Read full docs **[here](https://github.com/browserslist/update-db#readme)**.