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/electron-to-chromium/chromium-versions.json

@@ -0,0 +1 @@
+{"39":"0.20","40":"0.21","41":"0.21","42":"0.25","43":"0.27","44":"0.30","45":"0.31","47":"0.36","49":"0.37","50":"1.1","51":"1.2","52":"1.3","53":"1.4","54":"1.4","56":"1.6","58":"1.7","59":"1.8","61":"2.0","66":"3.0","69":"4.0","72":"5.0","73":"5.0","76":"6.0","78":"7.0","79":"8.0","80":"8.0","82":"9.0","83":"9.0","84":"10.0","85":"10.0","86":"11.0","87":"11.0","89":"12.0","90":"13.0","91":"13.0","92":"14.0","93":"14.0","94":"15.0","95":"16.0","96":"16.0","98":"17.0","99":"18.0","100":"18.0","102":"19.0","103":"20.0","104":"20.0","105":"21.0","106":"21.0","107":"22.0","108":"22.0","110":"23.0","111":"24.0","112":"24.0","114":"25.0","116":"26.0","118":"27.0","119":"28.0","120":"28.0","121":"29.0","122":"29.0","123":"30.0","124":"30.0","125":"31.0","126":"31.0","127":"32.0","128":"32.0","129":"33.0","130":"33.0","131":"34.0","132":"34.0","133":"35.0","134":"35.0","135":"36.0","136":"36.0","137":"37.0","138":"37.0","139":"38.0","140":"38.0","141":"39.0","142":"39.0","143":"40.0","144":"40.0","146":"41.0","147":"42.0","148":"42.0","149":"43.0","150":"43.0"}