feat: initialize Convert UI - browser-based file conversion app

- Add Next.js 16 with Turbopack and React 19
- Add Tailwind CSS 4 with OKLCH color system
- Implement FFmpeg.wasm for video/audio conversion
- Implement ImageMagick WASM for image conversion
- Add file upload with drag-and-drop
- Add format selector with fuzzy search
- Add conversion preview and download
- Add conversion history with localStorage
- Add dark/light theme support
- Support 22+ file formats across video, audio, and images

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -0,0 +1,34 @@
+{
+  "name": "convert-ui",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --turbopack",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@ffmpeg/ffmpeg": "^0.12.10",
+    "@ffmpeg/util": "^0.12.1",
+    "@imagemagick/magick-wasm": "^0.0.30",
+    "clsx": "^2.1.1",
+    "fuse.js": "^7.1.0",
+    "lucide-react": "^0.553.0",
+    "next": "^16.0.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "tailwind-merge": "^3.3.1"
+  },
+  "devDependencies": {
+    "@tailwindcss/postcss": "^4.1.17",
+    "@types/node": "^22",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "eslint": "^9",
+    "eslint-config-next": "^16.0.0",
+    "tailwindcss": "^4.0.0",
+    "typescript": "^5"
+  },
+  "packageManager": "pnpm@9.0.0"
+}