feat: round user tracker + fix INVITED status not updating on login

- Replace Semi-Finalist Tracker with Round User Tracker on dashboard
- New getRoundUserStats query: round-aware account activation stats
- Round selector dropdown to view any round's passed projects
- sendAccountReminders now accepts optional roundId for scoped reminders
- Fix: signIn callback now sets status=ACTIVE for INVITED users on login
- DB fix: 5 users who logged in via magic link but stayed INVITED → ACTIVE

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

src/app/(admin)/admin/dashboard-content.tsx

@@ -35,7 +35,7 @@ import { ActivityFeed } from '@/components/dashboard/activity-feed'
 import { CategoryBreakdown } from '@/components/dashboard/category-breakdown'
 import { DashboardSkeleton } from '@/components/dashboard/dashboard-skeleton'
 import { RecentEvaluations } from '@/components/dashboard/recent-evaluations'
-import { SemiFinalistTracker } from '@/components/dashboard/semi-finalist-tracker'
+import { RoundUserTracker } from '@/components/dashboard/round-user-tracker'
 
 type DashboardContentProps = {
   editionId: string
@@ -126,11 +126,7 @@ export function DashboardContent({ editionId, sessionName }: DashboardContentPro
     { limit: 8 },
     { enabled: !!editionId, refetchInterval: 30_000 }
   )
-  const { data: semiFinalistStats } = trpc.dashboard.getSemiFinalistStats.useQuery(
-    { editionId },
-    { enabled: !!editionId, refetchInterval: 120_000 }
-  )
-  const { data: featureFlags } = trpc.settings.getFeatureFlags.useQuery()
+  // Round User Tracker is self-contained — it fetches its own data
 
   if (isLoading) {
     return <DashboardSkeleton />
@@ -277,17 +273,9 @@ export function DashboardContent({ editionId, sessionName }: DashboardContentPro
             <SmartActions actions={nextActions} />
           </AnimatedCard>
 
-          {semiFinalistStats && semiFinalistStats.byCategory.length > 0 && (
-            <AnimatedCard index={6}>
-              <SemiFinalistTracker
-                byCategory={semiFinalistStats.byCategory}
-                byAward={semiFinalistStats.byAward}
-                unactivatedProjects={semiFinalistStats.unactivatedProjects}
-                editionId={editionId}
-                reminderThresholdDays={featureFlags?.accountReminderDays}
-              />
-            </AnimatedCard>
-          )}
+          <AnimatedCard index={6}>
+            <RoundUserTracker editionId={editionId} />
+          </AnimatedCard>
 
           <AnimatedCard index={7}>
             <ActivityFeed activity={liveActivity ?? recentActivity} />