Persist monitor list sorting

server/src/domain/monitors/monitor.repository.mongo.ts

@@ -101,7 +101,9 @@ class MongoMonitorsRepository implements IMonitorsRepository {
 
 	private pageOptions = (config: TeamQueryConfig) => {
 		const { page = 0, rowsPerPage = 0, field = "createdAt", order = "desc" } = config ?? {};
-		return { sort: { [field]: order === "asc" ? 1 : -1 } as const, skip: Math.max(page, 0) * rowsPerPage, limit: rowsPerPage };
+		const direction: 1 | -1 = order === "asc" ? 1 : -1;
+		const sort: Record<string, 1 | -1> = field === "createdAt" ? { createdAt: direction } : { [field]: direction, createdAt: 1 };
+		return { sort, skip: Math.max(page, 0) * rowsPerPage, limit: rowsPerPage };
 	};
 
 	findByTeamId = async (teamId: string, config: TeamQueryConfig, options?: { includeRecentChecks?: boolean }): Promise<Monitor[]> => {

server/test/integration/monitorRepository.test.ts

@@ -69,6 +69,34 @@ describe("MongoMonitorsRepository", () => {
 		});
 	});
 
+	describe("sorting", () => {
+		it("uses creation time as the fallback for equal primary values", async () => {
+			const repo = new MongoMonitorsRepository();
+			const teamId = new mongoose.Types.ObjectId();
+			const createMonitor = (name: string, type: string, status: string, createdAt: Date) =>
+				MonitorModel.create({
+					userId: new mongoose.Types.ObjectId(),
+					teamId,
+					name,
+					type,
+					status,
+					url: "https://example.com",
+					createdAt,
+				});
+
+			await createMonitor("newer-up", "hardware", "up", new Date("2026-03-01T00:00:00.000Z"));
+			await createMonitor("down", "http", "down", new Date("2026-04-01T00:00:00.000Z"));
+			await createMonitor("older-up", "pagespeed", "up", new Date("2026-01-01T00:00:00.000Z"));
+			await createMonitor("middle-up", "docker", "up", new Date("2026-02-01T00:00:00.000Z"));
+
+			const ascending = await repo.findByTeamIdWithStats(teamId.toString(), { field: "status", order: "asc" });
+			const descending = await repo.findByTeamIdWithStats(teamId.toString(), { field: "status", order: "desc" });
+
+			expect(ascending.map((monitor) => monitor.name)).toEqual(["down", "older-up", "middle-up", "newer-up"]);
+			expect(descending.map((monitor) => monitor.name)).toEqual(["older-up", "middle-up", "newer-up", "down"]);
+		});
+	});
+
 	describe("findByIds recentChecks modes", () => {
 		const seedFixtures = async () => {
 			const teamId = new mongoose.Types.ObjectId();