refactor(cms): deduplicate shared admin components and fix studio batch completion

- fix(studio): stop markBatchDone infinite recursion so batches complete
- refactor(api): merge api-response into api and drop the duplicate module
- refactor(media): extract shared media loader and URL validator
- refactor(ui): extract shared LoadingSpinner for site and admin groups
- refactor(dates): consolidate raw date formatting into formatDate util
- refactor(logs): share a single generic log-list loader across tables
- refactor(theme): merge both ColorField components and reuse contrast helpers
- refactor(import): extract shared ImportErrorBanner and SearchInput
- chore(): remove dead theme-editor-tabs after inlining tab components

src/app/admin/events/[id]/event-winners.tsx

@@ -9,6 +9,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { useServerAction } from "@/hooks/use-server-action";
+import { formatDate } from "@/lib/format-date";
 
 interface Winner {
 	id: number;
@@ -93,7 +94,7 @@ export function EventWinnersManager({ eventId, winners }: Props) {
 							</span>
 							<span className="font-medium text-sm">{w.username}</span>
 							<span className="text-xs text-muted-foreground ml-auto">
-								{new Date(w.createdAt).toLocaleDateString()}
+								{formatDate(new Date(w.createdAt), "date")}
 							</span>
 						</div>
 					))}