contents(admin): tidy the review queue + add gallery screenshots

- Review queue: past verdicts (e.g. the 13 hidden labels from an Aug/Sep cleanup
  sweep) are correct but noisy — they buried the items that still need a
  decision. They are now COLLAPSED behind a 'Show actioned (N)' toggle, with the
  verdicts untouched (still hidden) and 'Undo all N' still available. Verified:
  the Spots tab renders 0 hidden cards by default with the toggle + Undo all.
- public/images/screenshots/{map,spot,marketplace}.png (1280x800, quantised) for
  the app-listing gallery.

src/pages/AdminReviewPage.tsx

@@ -125,6 +125,9 @@ function QueueList({
   const { toast } = useToast();
 
   const [bulkBusy, setBulkBusy] = useState(false);
+  // Old verdicts (e.g. a cleanup sweep from weeks ago) are correct but noisy —
+  // they must not bury the items that still need a decision.
+  const [showActioned, setShowActioned] = useState(false);
   const mappers = useMemo(() => [...new Set(rows.map((r) => r.pubkey))], [rows]);
   const { data: trustScores } = useBatchTrustScores(mappers);
   const { getCounts } = useSpotReports(rows);
@@ -214,6 +217,8 @@ function QueueList({
   }
 
   const actioned = prepared.filter((r) => r.actioned);
+  const open = prepared.filter((r) => !r.actioned);
+  const visible = showActioned ? prepared : open;
 
   const undoAll = async () => {
     setBulkBusy(true);
@@ -235,11 +240,22 @@ function QueueList({
 
   return (
     <div className="space-y-3">
-      {actioned.length > 1 && (
+      {actioned.length > 0 && (
         <div className="flex flex-wrap items-center justify-between gap-2 rounded-2xl border border-white/10 bg-white/[0.02] px-4 py-3">
           <p className="text-xs text-gray-400">
-            {actioned.length} item{actioned.length === 1 ? '' : 's'} hidden or confirmed in this tab.
+            {actioned.length} already actioned in this tab (hidden or confirmed).
           </p>
+          <div className="flex flex-wrap items-center gap-2">
+            <Button
+              size="sm"
+              variant="ghost"
+              className="gap-1.5 text-gray-400 hover:text-white"
+              onClick={() => setShowActioned((v) => !v)}
+            >
+              <EyeOff className="h-3.5 w-3.5" />
+              {showActioned ? 'Hide actioned' : `Show actioned (${actioned.length})`}
+            </Button>
+          {actioned.length > 1 && (
           <AlertDialog>
             <AlertDialogTrigger asChild>
               <Button size="sm" variant="outline" className="gap-1.5 border-white/20" disabled={bulkBusy}>
@@ -263,9 +279,22 @@ function QueueList({
               </AlertDialogFooter>
             </AlertDialogContent>
           </AlertDialog>
+          )}
+          </div>
         </div>
       )}
-      {prepared.map(({ row, coord, hidden, verified, trust, reports, flags }) => (
+      {visible.length === 0 && (
+        <Card className="border-dashed border-white/10">
+          <CardContent className="space-y-3 py-12 text-center">
+            <CheckCircle2 className="mx-auto h-8 w-8 text-emerald-500" />
+            <p className="text-sm text-gray-400">
+              Nothing waiting on you. {actioned.length} earlier verdict
+              {actioned.length === 1 ? '' : 's'} {actioned.length === 1 ? 'is' : 'are'} hidden above.
+            </p>
+          </CardContent>
+        </Card>
+      )}
+      {visible.map(({ row, coord, hidden, verified, trust, reports, flags }) => (
         <Card
           key={row.id}
           className={