fix(pdf-viewer): use PDF.js with client-side rendering

- Created PDFViewerClient component with PDF.js
- Uses dynamic import with ssr: false to avoid server-side issues
- Full page navigation and zoom controls
- Upload or load from URL

package.json

@@ -21,6 +21,7 @@
     "framer-motion": "^12.23.12",
     "lightweight-charts": "^5.1.0",
     "next": "^15.5.3",
+    "pdfjs-dist": "^5.5.207",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
     "react-pdf": "^10.4.1",