Announce the pending screen once, not twice

The loader carries its own role="status" and label, so the <output> around
it was a second live region saying the same word.

frontend/src/components/Common/Loading.tsx

@@ -10,12 +10,11 @@ import { FluksioLoader } from "@/components/ui/fluksio-loader"
  */
 export function PageLoading() {
   return (
-    <output
-      aria-label="Loading"
+    <div
       data-testid="page-loading"
       className="flex min-h-64 items-center justify-center"
     >
       <FluksioLoader className="size-6 text-muted-foreground" />
-    </output>
+    </div>
   )
 }