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/react-dom/package.json

@@ -0,0 +1,62 @@
+{
+  "name": "react-dom",
+  "version": "18.3.1",
+  "description": "React package for working with the DOM.",
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/facebook/react.git",
+    "directory": "packages/react-dom"
+  },
+  "keywords": [
+    "react"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/facebook/react/issues"
+  },
+  "homepage": "https://reactjs.org/",
+  "dependencies": {
+    "loose-envify": "^1.1.0",
+    "scheduler": "^0.23.2"
+  },
+  "peerDependencies": {
+    "react": "^18.3.1"
+  },
+  "files": [
+    "LICENSE",
+    "README.md",
+    "index.js",
+    "client.js",
+    "profiling.js",
+    "server.js",
+    "server.browser.js",
+    "server.node.js",
+    "test-utils.js",
+    "cjs/",
+    "umd/"
+  ],
+  "exports": {
+    ".": "./index.js",
+    "./client": "./client.js",
+    "./server": {
+      "deno": "./server.browser.js",
+      "worker": "./server.browser.js",
+      "browser": "./server.browser.js",
+      "default": "./server.node.js"
+    },
+    "./server.browser": "./server.browser.js",
+    "./server.node": "./server.node.js",
+    "./profiling": "./profiling.js",
+    "./test-utils": "./test-utils.js",
+    "./package.json": "./package.json"
+  },
+  "browser": {
+    "./server.js": "./server.browser.js"
+  },
+  "browserify": {
+    "transform": [
+      "loose-envify"
+    ]
+  }
+}