refactor(housekeeping): split client, add loading states, URL persistence, fix dead code

- Split ManageClient into ManageSection, PresetsSection, TestSection,
  ImportSection, ExportSection - each tab only renders what it needs
- Add loading/disabled states to preset, import, export, clear buttons
- Persist search and group filter via URL searchParams (survives refresh)
- Remove dead getAuditHistory export from actions
- Fix testRankPermission - remove unnecessary revalidatePath with JSON result
- Clean up unused errors/count variables in bulkImportPermissions
- Add 'loading' translation key to housekeeping section (en/nl)

src/actions/admin-housekeeping.ts

@@ -131,9 +131,6 @@ export async function bulkImportPermissions(formData: FormData): Promise<void> {
 	await requirePermission(PERMS.SETTINGS_EDIT);
 
 	const raw = sanitize(String(formData.get("json") ?? ""));
-	const errors: string[] = [];
-	let count = 0;
-
 	if (!raw) return;
 
 	let parsed: unknown;
@@ -157,7 +154,6 @@ export async function bulkImportPermissions(formData: FormData): Promise<void> {
 		const dependsOn = sanitize(String(item.dependsOn ?? "")) || null;
 
 		if (!permission || !Number.isFinite(minRank) || minRank < 0) {
-			errors.push("Invalid entry: " + JSON.stringify(item));
 			continue;
 		}
 
@@ -180,9 +176,8 @@ export async function bulkImportPermissions(formData: FormData): Promise<void> {
 					updatedBy: userId ?? undefined,
 				},
 			});
-			count++;
 		} catch {
-			errors.push("Failed to upsert: " + permission);
+			// Failed to upsert
 		}
 	}
 
@@ -881,17 +876,7 @@ export async function testRankPermission(formData: FormData): Promise<void> {
 	});
 
 	const granted = perms.map((p) => p.permission);
-	// Result is displayed via the revalidated page
-	revalidatePath(
-		"/admin/housekeeping?tab=test&result=" +
-			encodeURIComponent(JSON.stringify({ rank, permissions: granted })),
-	);
+	revalidatePath("/admin/housekeeping");
 }
 
-export async function getAuditHistory(): Promise<unknown[]> {
-	await requirePermission(PERMS.SETTINGS_VIEW);
 
-	const { getAuditLogs } = await import("@/lib/services/audit");
-	const result = await getAuditLogs({ search: "housekeeping", perPage: 50 });
-	return result.rows;
-}