feat(finals): prominent finalist-docs banner on jury dashboard + gate nav to finals jury

Grand-Final jurors couldn't find the finalist documents review: the only entry
point was a top-nav text link (hidden in the hamburger on mobile), with nothing
on the dashboard. Add a prominent dashboard banner (shown only to finals-jury
members) linking to /jury/finals-documents, and gate the nav "Finalist Documents"
link to members so other jurors don't hit a dead "No access" page.

- finalist.canReviewDocuments: lightweight boolean procedure (self-resolves active
  program) so the nav can gate the link without fetching the full payload
- jury-nav: show "Finalist Documents" only when canReviewDocuments
- jury dashboard: FinalsJuryBanner server component, gated via userCanReviewFinals,
  rendered above content regardless of assignment state

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/(jury)/jury/page.tsx

@@ -28,7 +28,9 @@ import {
   Waves,
   Send,
   Trophy,
+  FileText,
 } from 'lucide-react'
+import { userCanReviewFinals, getOpenFinaleRound } from '@/server/services/final-documents'
 import { formatDateOnly } from '@/lib/utils'
 import { CountdownTimer } from '@/components/shared/countdown-timer'
 import { AnimatedCard } from '@/components/shared/animated-container'
@@ -42,6 +44,70 @@ function getGreeting(): string {
   return 'Good evening'
 }
 
+/**
+ * Prominent entry point to the finalist documents review, shown only to
+ * Grand-Final jury members (and admins). Rendered at the top of the dashboard
+ * regardless of whether the juror has individual assignments, so finals jurors
+ * can always find the teams' files in one obvious place.
+ */
+async function FinalsJuryBanner() {
+  const session = await auth()
+  const userId = session?.user?.id
+  if (!userId) return null
+
+  const program = await prisma.program.findFirst({
+    where: { status: 'ACTIVE' },
+    orderBy: { year: 'desc' },
+    select: { id: true },
+  })
+  if (!program) return null
+
+  const canReview = await userCanReviewFinals(prisma, userId, session.user.role, program.id)
+  if (!canReview) return null
+
+  const round = await getOpenFinaleRound(prisma, program.id)
+  const teamCount = round
+    ? await prisma.projectRoundState.count({ where: { roundId: round.id } })
+    : 0
+
+  return (
+    <AnimatedCard index={0}>
+      <Card className="overflow-hidden border-0 shadow-lg">
+        <div className="rounded-lg bg-gradient-to-r from-brand-blue to-brand-teal p-[1px]">
+          <CardContent className="flex flex-col gap-4 rounded-[7px] bg-background p-5 sm:flex-row sm:items-center sm:justify-between">
+            <div className="flex items-start gap-4">
+              <div className="shrink-0 rounded-xl bg-gradient-to-br from-brand-blue to-brand-teal p-3 shadow-sm">
+                <Trophy className="h-6 w-6 text-white" />
+              </div>
+              <div>
+                <p className="text-[11px] font-semibold uppercase tracking-wider text-brand-teal">
+                  Grand Final
+                </p>
+                <h2 className="text-lg font-bold text-brand-blue">Finalist Documents</h2>
+                <p className="mt-0.5 max-w-md text-sm text-muted-foreground">
+                  {teamCount > 0 ? `All ${teamCount} finalist teams’ ` : 'Every finalist team’s '}
+                  pitch decks, business plans, executive summaries and videos — in one place.
+                </p>
+              </div>
+            </div>
+            <Button
+              asChild
+              size="lg"
+              className="w-full shrink-0 bg-brand-blue shadow-md hover:bg-brand-blue-light sm:w-auto"
+            >
+              <Link href="/jury/finals-documents">
+                <FileText className="mr-2 h-4 w-4" />
+                Review Finalist Documents
+                <ArrowRight className="ml-2 h-4 w-4" />
+              </Link>
+            </Button>
+          </CardContent>
+        </div>
+      </Card>
+    </AnimatedCard>
+  )
+}
+
 async function JuryDashboardContent() {
   const session = await auth()
   const userId = session?.user?.id
@@ -863,6 +929,11 @@ export default async function JuryDashboardPage() {
       {/* Preferences banner (shown when juror has unconfirmed preferences) */}
       <JuryPreferencesBanner />
 
+      {/* Grand-Final finalist documents — prominent entry for finals jurors */}
+      <Suspense fallback={null}>
+        <FinalsJuryBanner />
+      </Suspense>
+
       {/* Content */}
       <Suspense fallback={<DashboardSkeleton />}>
         <JuryDashboardContent />