test(e2e): add TotpFactory with fixed seed

frontend/tests/factories/totp.ts

@@ -0,0 +1,18 @@
+import {Factory} from '../support/factory'
+
+// Fixed base32 secret so tests can generate deterministic codes with otplib.
+export const FIXED_TOTP_SECRET = 'JBSWY3DPEHPK3PXP'
+
+export class TotpFactory extends Factory {
+	static table = 'totp'
+
+	static factory() {
+		return {
+			id: '{increment}',
+			user_id: 1,
+			secret: FIXED_TOTP_SECRET,
+			enabled: true,
+			url: `otpauth://totp/Vikunja:test?secret=${FIXED_TOTP_SECRET}&issuer=Vikunja`,
+		}
+	}
+}