🐛 Bugfixes & Stability

Fixed

• PDF.js Worker CORS / Version mismatch: The app no longer loads the worker from unpkg by default. The installed pdfjs-dist worker is copied into public/ (via postinstall) and the client prefers a same-origin worker (/pdf.worker.min.mjs) to avoid CORS failures and API/worker version mismatches.
• Main page dashboard behavior: The main slideshow now uses the admin-controlled dashboard.mp4 when available. If dashboard.mp4 is not present, the main page shows the loading screen rather than displaying stale video content.
• Immediate UI updates for deletions: Deleting a video from the admin panel now notifies other same-origin tabs (BroadcastChannel shim) so the main/remote pages refresh immediately.

Changed

• Removed obsolete worker files from public/ and kept the single matching .mjs worker.