fix: use unpkg CDN for pdfjs worker instead of bundled file

The new URL('pdfjs-dist/...', import.meta.url) approach requires pdfjs-dist
to be symlinked directly under apps/web/node_modules, which is fragile with
pnpm workspaces. Using the CDN URL (pinned to pdfjs.version) is simpler and
more reliable — no build-time asset bundling needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: muness

apps/web/src/components/PdfViewer.tsx

@@ -3,10 +3,7 @@ import { Document, Page, pdfjs } from 'react-pdf'
 
 import { fetchDocumentPdfBuffer } from '../api'
 
-pdfjs.GlobalWorkerOptions.workerSrc = new URL(
-  'pdfjs-dist/build/pdf.worker.min.mjs',
-  import.meta.url,
-).toString()
+pdfjs.GlobalWorkerOptions.workerSrc = `https://unpkg.com/pdfjs-dist@${pdfjs.version}/build/pdf.worker.min.mjs`
 
 const ZOOM_MIN = 0.5
 const ZOOM_MAX = 3.0