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/.vite/deps/_metadata.json

@@ -0,0 +1,46 @@
+{
+  "hash": "4192db03",
+  "configHash": "3029ca7c",
+  "lockfileHash": "e4eea47b",
+  "browserHash": "6d787e02",
+  "optimized": {
+    "react": {
+      "src": "../../react/index.js",
+      "file": "react.js",
+      "fileHash": "3163c923",
+      "needsInterop": true
+    },
+    "react-dom": {
+      "src": "../../react-dom/index.js",
+      "file": "react-dom.js",
+      "fileHash": "6611afe3",
+      "needsInterop": true
+    },
+    "react/jsx-dev-runtime": {
+      "src": "../../react/jsx-dev-runtime.js",
+      "file": "react_jsx-dev-runtime.js",
+      "fileHash": "ff92c518",
+      "needsInterop": true
+    },
+    "react/jsx-runtime": {
+      "src": "../../react/jsx-runtime.js",
+      "file": "react_jsx-runtime.js",
+      "fileHash": "27535d81",
+      "needsInterop": true
+    },
+    "react-dom/client": {
+      "src": "../../react-dom/client.js",
+      "file": "react-dom_client.js",
+      "fileHash": "5b6b0479",
+      "needsInterop": true
+    }
+  },
+  "chunks": {
+    "chunk-HCIN4FJ4": {
+      "file": "chunk-HCIN4FJ4.js"
+    },
+    "chunk-REFQX4J5": {
+      "file": "chunk-REFQX4J5.js"
+    }
+  }
+}