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/server/routers/notification.ts

@@ -94,6 +94,23 @@ export const notificationRouter = router({
       return { success: true }
     }),
 
+  /**
+   * Mark multiple notifications as read by IDs
+   */
+  markBatchAsRead: protectedProcedure
+    .input(z.object({ ids: z.array(z.string()).min(1).max(50) }))
+    .mutation(async ({ ctx, input }) => {
+      await ctx.prisma.inAppNotification.updateMany({
+        where: {
+          id: { in: input.ids },
+          userId: ctx.user.id,
+          isRead: false,
+        },
+        data: { isRead: true, readAt: new Date() },
+      })
+      return { success: true }
+    }),
+
   /**
    * Mark all notifications as read for the current user
    */