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/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "electron-to-chromium",
+  "version": "1.5.356",
+  "description": "Provides a list of electron-to-chromium version mappings",
+  "main": "index.js",
+  "files": [
+    "versions.js",
+    "full-versions.js",
+    "chromium-versions.js",
+    "full-chromium-versions.js",
+    "versions.json",
+    "full-versions.json",
+    "chromium-versions.json",
+    "full-chromium-versions.json",
+    "LICENSE"
+  ],
+  "scripts": {
+    "build": "node build.mjs",
+    "update": "node automated-update.js",
+    "test": "nyc ava --verbose",
+    "report": "nyc report --reporter=text-lcov > coverage.lcov"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Kilian/electron-to-chromium.git"
+  },
+  "keywords": [
+    "electron",
+    "chrome",
+    "chromium",
+    "browserslist",
+    "browserlist"
+  ],
+  "author": "Kilian Valkhof",
+  "license": "ISC",
+  "devDependencies": {
+    "ava": "^7.0.0",
+    "compare-versions": "^6.1.1",
+    "node-fetch": "^3.3.2",
+    "nyc": "^18.0.0",
+    "shelljs": "^0.10.0"
+  }
+}