Competition/Round architecture: full platform rewrite (Phases 1-9)

Replace Pipeline/Stage system with Competition/Round architecture.
New schema: Competition, Round (7 types), JuryGroup, AssignmentPolicy,
ProjectRoundState, DeliberationSession, ResultLock, SubmissionWindow.
New services: round-engine, round-assignment, deliberation, result-lock,
submission-manager, competition-context, ai-prompt-guard.
Full admin/jury/applicant/mentor UI rewrite. AI prompt hardening with
structured prompts, retry logic, and injection detection. All legacy
pipeline/stage code removed. 4 new migrations + seed aligned.

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

src/app/(admin)/admin/competitions/page.tsx

@@ -0,0 +1,201 @@
+'use client'
+
+import Link from 'next/link'
+import type { Route } from 'next'
+import { trpc } from '@/lib/trpc/client'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import {
+  Card,
+  CardContent,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import { Skeleton } from '@/components/ui/skeleton'
+import {
+  Plus,
+  Medal,
+  Calendar,
+  Users,
+  Layers,
+  FileBox,
+} from 'lucide-react'
+import { cn } from '@/lib/utils'
+import { formatDistanceToNow } from 'date-fns'
+import { useEdition } from '@/contexts/edition-context'
+
+const statusConfig = {
+  DRAFT: {
+    label: 'Draft',
+    bgClass: 'bg-gray-100 text-gray-700',
+    dotClass: 'bg-gray-500',
+  },
+  ACTIVE: {
+    label: 'Active',
+    bgClass: 'bg-emerald-100 text-emerald-700',
+    dotClass: 'bg-emerald-500',
+  },
+  CLOSED: {
+    label: 'Closed',
+    bgClass: 'bg-blue-100 text-blue-700',
+    dotClass: 'bg-blue-500',
+  },
+  ARCHIVED: {
+    label: 'Archived',
+    bgClass: 'bg-muted text-muted-foreground',
+    dotClass: 'bg-muted-foreground',
+  },
+} as const
+
+export default function CompetitionListPage() {
+  const { currentEdition } = useEdition()
+  const programId = currentEdition?.id
+
+  const { data: competitions, isLoading } = trpc.competition.list.useQuery(
+    { programId: programId! },
+    { enabled: !!programId }
+  )
+
+  if (!programId) {
+    return (
+      <div className="space-y-6">
+        <div className="flex items-center justify-between">
+          <div>
+            <h1 className="text-xl font-bold">Competitions</h1>
+            <p className="text-sm text-muted-foreground">
+              Select an edition to view competitions
+            </p>
+          </div>
+        </div>
+        <Card>
+          <CardContent className="flex flex-col items-center justify-center py-12 text-center">
+            <Calendar className="h-12 w-12 text-muted-foreground/50" />
+            <p className="mt-2 font-medium">No Edition Selected</p>
+            <p className="text-sm text-muted-foreground">
+              Select an edition from the sidebar to view its competitions
+            </p>
+          </CardContent>
+        </Card>
+      </div>
+    )
+  }
+
+  return (
+      <div className="space-y-6 px-4 sm:px-0">
+        {/* Header */}
+        <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <div>
+          <h1 className="text-xl font-bold">Competitions</h1>
+          <p className="text-sm text-muted-foreground">
+            Manage competitions for {currentEdition?.name}
+          </p>
+        </div>
+        <Link href={`/admin/competitions/new?programId=${programId}` as Route}>
+          <Button size="sm" className="w-full sm:w-auto">
+            <Plus className="h-4 w-4 mr-1" />
+            New Competition
+          </Button>
+        </Link>
+      </div>
+
+      {/* Loading */}
+      {isLoading && (
+        <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
+          {[1, 2, 3].map((i) => (
+            <Card key={i}>
+              <CardHeader>
+                <Skeleton className="h-5 w-32" />
+                <Skeleton className="h-4 w-20 mt-1" />
+              </CardHeader>
+              <CardContent>
+                <Skeleton className="h-4 w-full" />
+                <Skeleton className="h-4 w-3/4 mt-2" />
+              </CardContent>
+            </Card>
+          ))}
+        </div>
+      )}
+
+      {/* Empty State */}
+      {!isLoading && (!competitions || competitions.length === 0) && (
+        <Card className="border-2 border-dashed">
+          <CardContent className="flex flex-col items-center justify-center py-16 text-center">
+            <div className="rounded-full bg-primary/10 p-4 mb-4">
+              <Medal className="h-10 w-10 text-primary" />
+            </div>
+            <h3 className="text-lg font-semibold mb-2">No Competitions Yet</h3>
+            <p className="text-sm text-muted-foreground max-w-md mb-6">
+              Competitions organize your multi-round evaluation workflow with jury groups,
+              submission windows, and scoring. Create your first competition to get started.
+            </p>
+            <Link href={`/admin/competitions/new?programId=${programId}` as Route}>
+              <Button>
+                <Plus className="h-4 w-4 mr-2" />
+                Create Your First Competition
+              </Button>
+            </Link>
+          </CardContent>
+        </Card>
+      )}
+
+      {/* Competition Cards */}
+      {competitions && competitions.length > 0 && (
+        <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
+          {competitions.map((competition) => {
+            const status = competition.status as keyof typeof statusConfig
+            const config = statusConfig[status] || statusConfig.DRAFT
+
+            return (
+              <Link key={competition.id} href={`/admin/competitions/${competition.id}` as Route}>
+                <Card className="group cursor-pointer hover:shadow-md transition-shadow h-full flex flex-col">
+                  <CardHeader className="pb-3">
+                    <div className="flex items-start justify-between gap-3">
+                      <div className="min-w-0 flex-1">
+                        <CardTitle className="text-base leading-tight">
+                          {competition.name}
+                        </CardTitle>
+                        <p className="text-xs text-muted-foreground mt-1 font-mono">
+                          {competition.slug}
+                        </p>
+                      </div>
+                      <Badge
+                        variant="secondary"
+                        className={cn(
+                          'text-[10px] shrink-0 flex items-center gap-1.5',
+                          config.bgClass
+                        )}
+                      >
+                        <span className={cn('h-1.5 w-1.5 rounded-full', config.dotClass)} />
+                        {config.label}
+                      </Badge>
+                    </div>
+                  </CardHeader>
+
+                  <CardContent className="mt-auto">
+                    <div className="flex flex-wrap items-center gap-x-4 gap-y-1 text-xs text-muted-foreground">
+                      <div className="flex items-center gap-1.5">
+                        <Layers className="h-3.5 w-3.5" />
+                        <span>{competition._count.rounds} rounds</span>
+                      </div>
+                      <div className="flex items-center gap-1.5">
+                        <Users className="h-3.5 w-3.5" />
+                        <span>{competition._count.juryGroups} juries</span>
+                      </div>
+                      <div className="flex items-center gap-1.5">
+                        <FileBox className="h-3.5 w-3.5" />
+                        <span>{competition._count.submissionWindows} windows</span>
+                      </div>
+                    </div>
+                    <div className="mt-2 text-xs text-muted-foreground">
+                      Updated {formatDistanceToNow(new Date(competition.updatedAt))} ago
+                    </div>
+                  </CardContent>
+                </Card>
+              </Link>
+            )
+          })}
+        </div>
+      )}
+    </div>
+  )
+}