Fix Visual Manager opacity and load categories like CatalogTree.

Use an opaque admin-canvas portal and lazy parentId fetches instead of mode=full, which fails on large catalogs. Search no longer loads the entire tree.

Co-authored-by: Cursor <[email protected]>

src/components/admin/catalog-manager/root-tabs.tsx

@@ -128,7 +128,10 @@ export function RootTabs({
 		: null;
 
 	return (
-		<div className="flex items-center gap-1 border-b bg-muted/30 px-2 py-1.5 overflow-x-auto shrink-0">
+		<div
+			className="flex shrink-0 items-center gap-1 overflow-x-auto border-b border-[var(--admin-border)] px-2 py-1.5"
+			style={{ backgroundColor: "var(--admin-surface)" }}
+		>
 			{confirmDialog}
 			{loading && (
 				<Loader2 className="h-4 w-4 animate-spin text-muted-foreground mx-2" />