Add COI/manual reassignment emails, confirmation dialog, and smart juror selection

- Add COI_REASSIGNED and MANUAL_REASSIGNED notification types with distinct
  email templates, icons, and priorities
- COI declaration dialog now shows a confirmation step warning that the
  project will be reassigned before submitting
- reassignAfterCOI now checks historical assignments (all rounds, audit logs)
  to never assign the same project to a juror twice, and prefers jurors with
  incomplete evaluations over those who have finished all their work
- Admin transfer (transferAssignments) sends per-juror MANUAL_REASSIGNED
  notifications with actual project names instead of generic batch emails
- docker-entrypoint syncs notification settings on every deploy via upsert

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

docker/docker-entrypoint.sh

@@ -33,5 +33,9 @@ else
   echo "==> Database already seeded ($USER_COUNT users found), skipping seed."
 fi
 
+# Always sync notification email settings (upsert — safe for existing data)
+echo "==> Syncing notification email settings..."
+npx tsx prisma/seed-notification-settings.ts || echo "WARNING: Notification settings sync failed."
+
 echo "==> Starting application..."
 exec node server.js