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/picomatch/index.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const pico = require('./lib/picomatch');
+const utils = require('./lib/utils');
+
+function picomatch(glob, options, returnState = false) {
+  // default to os.platform()
+  if (options && (options.windows === null || options.windows === undefined)) {
+    // don't mutate the original options object
+    options = { ...options, windows: utils.isWindows() };
+  }
+
+  return pico(glob, options, returnState);
+}
+
+Object.assign(picomatch, pico);
+module.exports = picomatch;