Jury dashboard compact layout, assignment redesign, auth fixes

- Jury dashboard: collapse zero-assignment state into single welcome card
  with inline quick actions; merge completion bar into stats row; tighten spacing
- Manual assignment: replace tiny Dialog modal with inline collapsible section
  featuring searchable juror combobox and multi-select project list with bulk assign
- Fix applicant invite URL path (/auth/accept-invite -> /accept-invite)
- Add APPLICANT role redirect to /my-submission from root page
- Add Applicant label to accept-invite role display
- Fix a/an grammar in invitation emails and accept-invite page
- Set-password page: use MOPC logo instead of lock icon
- Notification bell: remove filter tabs, always show all notifications

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

src/app/page.tsx

@@ -23,6 +23,8 @@ export default async function HomePage() {
       redirect('/mentor' as Route)
     } else if (session.user.role === 'OBSERVER') {
       redirect('/observer')
+    } else if (session.user.role === 'APPLICANT') {
+      redirect('/my-submission' as Route)
     }
   }