feat: enhance session management by resolving collaborators to users and integrating CollaboratorDisplay component across motivators and sessions pages

src/app/motivators/[id]/page.tsx

@@ -3,7 +3,7 @@ import Link from 'next/link';
 import { auth } from '@/lib/auth';
 import { getMotivatorSessionById } from '@/services/moving-motivators';
 import { MotivatorBoard, MotivatorLiveWrapper } from '@/components/moving-motivators';
-import { Badge } from '@/components/ui';
+import { Badge, CollaboratorDisplay } from '@/components/ui';
 import { EditableMotivatorTitle } from './EditableTitle';
 
 interface MotivatorSessionPageProps {
@@ -48,9 +48,13 @@ export default async function MotivatorSessionPage({ params }: MotivatorSessionP
               initialTitle={session.title}
               isOwner={session.isOwner}
             />
-            <p className="mt-1 text-lg text-muted">
-              👤 {session.participant}
-            </p>
+            <div className="mt-2">
+              <CollaboratorDisplay
+                collaborator={session.resolvedParticipant}
+                size="lg"
+                showEmail
+              />
+            </div>
           </div>
           <div className="flex items-center gap-3">
             <Badge variant="primary">