feat: add CSV/JSON export, advanced bulk filters & selection to Catalog Manager

- Admin Audit Log: CSV/JSON export via ?format=query param
- Catalog Manager: club_only / have_offer filters (multi-filter support)
- Offer discovery: refactored discoverOffers() to accept filters object
- Translations added for new filter labels
- Test updates for all modified paths

src/app/api/admin/logs/audit/export/route.test.ts

@@ -31,7 +31,7 @@ vi.mock("@/lib/services/audit", () => ({
 import { getAuditLogs } from "@/lib/services/audit";
 import { GET } from "./route";
 
-describe("audit CSV", () => {
+describe("audit export", () => {
 	beforeEach(() => {
 		vi.mocked(getAuditLogs).mockClear();
 	});
@@ -54,6 +54,19 @@ describe("audit CSV", () => {
 		});
 		expect(response.headers.get("Cache-Control")).toBe("no-store");
 	});
+	it("supports JSON export format", async () => {
+		const response = await GET(
+			new Request(
+				"https://example.test/api/admin/logs/audit/export?format=json",
+			) as never,
+			{} as never,
+		);
+		expect(response.headers.get("Content-Type")).toContain("application/json");
+		const json = await response.json();
+		expect(Array.isArray(json)).toBe(true);
+		expect(json[0].id).toBe(1);
+		expect(json[0].username).toBe('=HYPERLINK("bad")');
+	});
 	it("escapes CSV formula cells and redacts historical secrets", async () => {
 		const response = await GET(
 			new Request("https://example.test/api/admin/logs/audit/export") as never,

src/app/api/admin/logs/audit/export/route.ts

@@ -23,6 +23,7 @@ export const GET = withAdmin(
 			from: params.get("from") ?? undefined,
 			to: params.get("to") ?? undefined,
 		});
+		const format = params.get("format") || "csv";
 		const rows: unknown[][] = [
 			[
 				"id",
@@ -35,8 +36,17 @@ export const GET = withAdmin(
 				"changes",
 			],
 		];
+		const jsonItems = [];
 		for (const row of result.rows) {
 			const details = readAuditChanges(row.diff, row.before, row.after);
+			const changesFormatted = details.invalid
+				? "[Unavailable legacy details]"
+				: details.changes
+						.map(
+							(change) =>
+								`${change.key}: ${formatAuditValue(change.from)} → ${formatAuditValue(change.to)}`,
+						)
+						.join("\n");
 			rows.push([
 				row.id,
 				row.userId,
@@ -45,15 +55,27 @@ export const GET = withAdmin(
 				row.target,
 				row.targetId,
 				row.createdAt,
-				details.invalid
-					? "[Unavailable legacy details]"
-					: details.changes
-							.map(
-								(change) =>
-									`${change.key}: ${formatAuditValue(change.from)} → ${formatAuditValue(change.to)}`,
-							)
-							.join("\n"),
+				changesFormatted,
 			]);
+			jsonItems.push({
+				id: row.id,
+				userId: row.userId,
+				username: row.username,
+				action: row.action,
+				target: row.target,
+				targetId: row.targetId,
+				createdAt: row.createdAt,
+				changes: details.changes,
+			});
+		}
+		if (format === "json") {
+			return new Response(JSON.stringify(jsonItems, null, 2), {
+				headers: {
+					"Content-Type": "application/json; charset=utf-8",
+					"Content-Disposition": 'attachment; filename="audit-page.json"',
+					"Cache-Control": "no-store",
+				},
+			});
 		}
 		return new Response(
 			`\uFEFF${rows.map((row) => row.map(cell).join(",")).join("\r\n")}`,