Auto-assign projects to first round, auto-filter on close, pipeline UX consolidation

- New projects (admin create, CSV import, public form) auto-assign to program's
  first round (by sortOrder) when no round is specified
- Closing a FILTERING round auto-starts filtering job (configurable via
  autoFilterOnClose setting, defaults to true)
- Add SUBMISSION_RECEIVED notification type for confirming submissions
- Replace separate List/Pipeline toggle with integrated pipeline view below
  the sortable round list
- Add autoFilterOnClose toggle to filtering round type settings UI

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

src/server/services/in-app-notification.ts

@@ -77,6 +77,7 @@ export const NotificationTypes = {
   FEEDBACK_AVAILABLE: 'FEEDBACK_AVAILABLE',
   EVENT_INVITATION: 'EVENT_INVITATION',
   WINNER_ANNOUNCEMENT: 'WINNER_ANNOUNCEMENT',
+  SUBMISSION_RECEIVED: 'SUBMISSION_RECEIVED',
   CERTIFICATE_READY: 'CERTIFICATE_READY',
   PROGRAM_NEWSLETTER: 'PROGRAM_NEWSLETTER',
 
@@ -107,6 +108,7 @@ export const NotificationIcons: Record<string, string> = {
   [NotificationTypes.MENTEE_ADVANCED]: 'TrendingUp',
   [NotificationTypes.MENTEE_WON]: 'Trophy',
   [NotificationTypes.APPLICATION_SUBMITTED]: 'CheckCircle',
+  [NotificationTypes.SUBMISSION_RECEIVED]: 'Inbox',
   [NotificationTypes.ADVANCED_SEMIFINAL]: 'TrendingUp',
   [NotificationTypes.ADVANCED_FINAL]: 'Star',
   [NotificationTypes.MENTOR_ASSIGNED]: 'GraduationCap',