Observer dashboard extraction, PDF reports, jury UX overhaul, and miscellaneous improvements

- Extract observer dashboard to client component, add PDF export button
- Add PDF report generator with jsPDF for analytics reports
- Overhaul jury evaluation page with improved layout and UX
- Add new analytics endpoints for observer/admin reports
- Improve round creation/edit forms with better settings
- Fix filtering rules page, CSV export dialog, notification bell
- Update auth, prisma schema, and various type fixes

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

src/types/round-settings.ts

@@ -53,7 +53,7 @@ export type RoundSettings =
 export const defaultFilteringSettings: FilteringRoundSettings = {
   autoEliminationEnabled: false,
   autoEliminationThreshold: 4,
-  autoEliminationMinReviews: 3,
+  autoEliminationMinReviews: 0,
   targetAdvancing: 60,
   showAverageScore: true,
   showRanking: true,