Build Order: Reconstructing Gesture PDF Presenter

Step-by-Step Implementation Flow

1. Upload Server: Implement server.ts with Multer file storage and PDF magic-byte checks.
2. Frontend Setup: Initialize Vite + React 18 with Tailwind CSS and Lucide icons.
3. PDF Viewer: Build usePDFViewer.ts integrating pdfjs-dist on an HTML5 canvas.
4. Camera Stream: Connect react-webcam with mirror transformation and 30fps capture.
5. MediaPipe Tracking: Initialize @mediapipe/hands WebAssembly worker.
6. Gesture Recognition: Develop Euclidean vector heuristics and temporal debounce locks.
7. Overlay Canvases: Implement LaserCursor.tsx and drawing tools.