feat: applicant onboarding, bulk invite, team management enhancements

- Add nationality/institution fields to User model with migration
- Applicant onboarding wizard (name, photo, nationality, country, institution, bio, project logo, preferences)
- Project logo upload from applicant context with team membership verification
- APPLICANT redirects in set-password, onboarding, and auth layout
- Mask evaluation round names as "Evaluation Round 1/2/..." for applicants
- Extend inviteTeamMember with nationality/country/institution/sendInvite fields
- Admin getApplicants query with search/filter/pagination
- Admin bulkInviteApplicants mutation with token generation and emails
- Applicants tab on Members page with bulk select and floating invite bar

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

src/app/(auth)/layout.tsx

@@ -35,6 +35,8 @@ export default async function AuthLayout({
         redirect('/observer')
       } else if (role === 'MENTOR') {
         redirect('/mentor')
+      } else if (role === 'APPLICANT') {
+        redirect('/applicant')
       }
     }
     // If user doesn't exist in DB, fall through and show auth page