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>

prisma/seed-candidatures.ts

@@ -346,7 +346,7 @@ async function main() {
             email,
             name: row['Full name']?.trim() || 'Unknown',
             role: 'APPLICANT',
-            status: 'INVITED',
+            status: 'NONE',
             phoneNumber: row['Téléphone']?.trim() || null,
           },
         })
@@ -424,7 +424,7 @@ async function main() {
               email: memberEmail,
               name: member.name,
               role: 'APPLICANT',
-              status: 'INVITED',
+              status: 'NONE',
               metadataJson: {
                 isPendingEmailVerification: true,
                 originalName: member.name,