Redesign admin dashboard: pipeline view, round-specific stats, smart actions

Complete rewrite of the admin dashboard replacing the 1056-line monolith with
modular components. Key improvements:

- Competition pipeline: horizontal visualization of all rounds in pipeline order
  (by sortOrder, not creation date) with type-specific icons and metrics
- Round-specific stats: stat cards dynamically change based on active round type
  (INTAKE shows submissions/docs, FILTERING shows pass/fail/flagged, EVALUATION
  shows assignments/completion, fallback shows generic project/jury stats)
- Smart actions: context-aware "Action Required" panel that only flags the next
  draft round (not all), only flags unassigned projects for EVALUATION rounds,
  includes deadline warnings with severity levels (critical/warning/info)
- Active round panel: detailed view with project state bar, type-specific content,
  and deadline countdown
- Extracted components: project list, activity feed, category breakdown, skeleton

Backend enriched with 17 parallel queries building rich PipelineRound data
including per-round project states, eval stats, filtering stats, live session
status, and deliberation counts.

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

src/components/dashboard/dashboard-skeleton.tsx

@@ -0,0 +1,78 @@
+'use client'
+
+import { Card, CardContent, CardHeader } from '@/components/ui/card'
+import { Skeleton } from '@/components/ui/skeleton'
+
+export function DashboardSkeleton() {
+  return (
+    <>
+      {/* Header skeleton */}
+      <Skeleton className="h-32 w-full rounded-2xl" />
+
+      {/* Stats row skeleton */}
+      <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-5">
+        {[...Array(5)].map((_, i) => (
+          <Card key={i} className="border-l-4 border-l-muted">
+            <CardContent className="p-4">
+              <Skeleton className="h-4 w-16" />
+              <Skeleton className="mt-2 h-8 w-12" />
+              <Skeleton className="mt-1 h-3 w-20" />
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+
+      {/* Two-column content skeleton */}
+      <div className="grid gap-6 lg:grid-cols-12">
+        <div className="space-y-6 lg:col-span-8">
+          <Card>
+            <CardHeader>
+              <Skeleton className="h-5 w-32" />
+              <Skeleton className="h-3 w-48" />
+            </CardHeader>
+            <CardContent>
+              <div className="space-y-3">
+                {[...Array(3)].map((_, i) => (
+                  <Skeleton key={i} className="h-24 w-full rounded-xl" />
+                ))}
+              </div>
+            </CardContent>
+          </Card>
+          <Card>
+            <CardHeader>
+              <Skeleton className="h-5 w-40" />
+              <Skeleton className="h-3 w-32" />
+            </CardHeader>
+            <CardContent>
+              <div className="space-y-2">
+                {[...Array(5)].map((_, i) => (
+                  <Skeleton key={i} className="h-14 w-full" />
+                ))}
+              </div>
+            </CardContent>
+          </Card>
+        </div>
+        <div className="space-y-6 lg:col-span-4">
+          {[...Array(4)].map((_, i) => (
+            <Card key={i}>
+              <CardHeader><Skeleton className="h-5 w-32" /></CardHeader>
+              <CardContent>
+                <div className="space-y-3">
+                  {[...Array(3)].map((_, j) => (
+                    <Skeleton key={j} className="h-10 w-full" />
+                  ))}
+                </div>
+              </CardContent>
+            </Card>
+          ))}
+        </div>
+      </div>
+
+      {/* Bottom skeleton */}
+      <div className="grid gap-6 lg:grid-cols-12">
+        <Skeleton className="h-[400px] w-full rounded-lg lg:col-span-8" />
+        <Skeleton className="h-[400px] w-full rounded-lg lg:col-span-4" />
+      </div>
+    </>
+  )
+}