feat: make catalog-pages dedup a choosable step in Fix alles

The maintenance "Fix alles" now has a checkbox to include or skip the
duplicate catalog_pages merge, so admins can choose whether to run it.
removeDuplicates takes an includePages flag and fixEverything threads it
through to the action.

src/components/admin/catalog/catalog-maintenance-panel.tsx

@@ -22,6 +22,7 @@ import {
 	CardHeader,
 	CardTitle,
 } from "@/components/ui/card";
+import { Checkbox } from "@/components/ui/checkbox";
 
 interface Health {
 	itemsBaseTotal: number;
@@ -38,6 +39,7 @@ export function CatalogMaintenancePanel() {
 	const [health, setHealth] = useState<Health | null>(null);
 	const [loading, setLoading] = useState(true);
 	const [busy, setBusy] = useState<string | null>(null);
+	const [dedupePages, setDedupePages] = useState(true);
 	const [alignPreview, setAlignPreview] = useState<{
 		moves: number;
 		inserted: number;
@@ -286,12 +288,38 @@ export function CatalogMaintenancePanel() {
 					</CardDescription>
 				</CardHeader>
 				<CardContent>
+					<div className="mb-3 flex items-center gap-2 rounded-md border p-2">
+						<Checkbox
+							id="dedupe-pages"
+							checked={dedupePages}
+							onCheckedChange={(v) => setDedupePages(v === true)}
+						/>
+						<label
+							htmlFor="dedupe-pages"
+							className="text-sm text-muted-foreground"
+						>
+							Also merge duplicate catalog pages (double links)
+						</label>
+					</div>
 					<Button
 						variant="destructive"
 						disabled={busy !== null}
-						onClick={() =>
-							void run("all", fixEverythingAction, "All repairs applied")
-						}
+						onClick={async () => {
+							setBusy("all");
+							try {
+								const res = await fixEverythingAction({ dedupePages });
+								if (res.ok) {
+									toast.success("All repairs applied");
+									await refresh();
+								} else {
+									toast.error(res.error ?? "Failed");
+								}
+							} catch (e) {
+								toast.error(String(e));
+							} finally {
+								setBusy(null);
+							}
+						}}
 					>
 						Fix everything now
 					</Button>