feat: semi-finalist tracker dashboard, account reminders, search + UX fixes

- Add getSemiFinalistStats query with per-category/per-award breakdown
- Add sendAccountReminders mutation with invite token generation and dedup
- Add SemiFinalistTracker dashboard widget with progress bars and remind buttons
- Add ACCOUNT_REMINDER email template
- Extend project search to match team member name/email (7 locations)
- Fix Passed count deduplication: count distinct projects, not round-state rows
- Fix role switcher: visible pills above user section, auto-refresh session on mount

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

src/components/layouts/role-nav.tsx

@@ -69,7 +69,7 @@ function isNavItemActive(pathname: string, href: string, basePath: string): bool
 export function RoleNav({ navigation, roleName, user, basePath, statusBadge, editionSelector, helpEmail }: RoleNavProps) {
   const pathname = usePathname()
   const [isMobileMenuOpen, setIsMobileMenuOpen] = useState(false)
-  const { data: session, status: sessionStatus } = useSession()
+  const { data: session, status: sessionStatus, update: updateSession } = useSession()
   const isAuthenticated = sessionStatus === 'authenticated'
   const { data: avatarUrl } = trpc.avatar.getUrl.useQuery(undefined, {
     enabled: isAuthenticated,
@@ -78,6 +78,14 @@ export function RoleNav({ navigation, roleName, user, basePath, statusBadge, edi
   const [mounted, setMounted] = useState(false)
   useEffect(() => setMounted(true), [])
 
+  // Auto-refresh session on mount to pick up role changes without requiring re-login
+  useEffect(() => {
+    if (isAuthenticated) {
+      updateSession()
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [isAuthenticated])
+
   // Roles the user can switch to (excluding current view)
   const userRoles = (session?.user?.roles as UserRole[] | undefined) ?? []
   const switchableRoles = Object.entries(ROLE_SWITCH_OPTIONS)