feat(catalog): SSR stats in Visual Manager, honest deletes, newPageParent

Pass DB totals into StatsBar, mirror Catalog Structure delete copy, and open New Page with ?newPageParent= for shop and BC.

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

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

@@ -127,7 +127,7 @@ export function RootTabs({
 		if (!canEdit) return;
 		const ok = await confirm({
 			title: "Delete root page",
-			description: `Delete root page "${tab.caption}"? Children will be reparented.`,
+			description: `Delete root page "${tab.caption}"? Child pages (if any) will be moved to root; items on this page will be deleted.`,
 			confirmLabel: "Delete",
 		});
 		if (!ok) return;