feat: wire AWARD_MASTER into auth redirects and role-switch navigation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/layouts/admin-sidebar.tsx

@@ -162,6 +162,7 @@ const ROLE_SWITCH_OPTIONS: Record<string, { label: string; path: string; icon: t
   JURY_MEMBER: { label: 'Jury View', path: '/jury', icon: Scale },
   MENTOR: { label: 'Mentor View', path: '/mentor', icon: Handshake },
   OBSERVER: { label: 'Observer View', path: '/observer', icon: Eye },
+  AWARD_MASTER: { label: 'Award Master', path: '/award-master', icon: Trophy },
 }
 
 export function AdminSidebar({ user }: AdminSidebarProps) {