feat: add OpenID Connect prompt Parameter Handling (#1299)

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Elias Schneider <login@eliasschneider.com>

tests/utils/oidc.util.ts

@@ -1,5 +1,34 @@
 import type { Page } from '@playwright/test';
 
+export async function interceptCallbackRedirect(
+	page: Page,
+	callbackPath: string,
+	action: () => Promise<void>,
+	timeoutMs: number = 10000
+): Promise<URL> {
+	const routeMatcher = (url: URL) => url.pathname === callbackPath;
+
+	const callbackPromise = new Promise<URL>((resolve, reject) => {
+		const timer = setTimeout(
+			() => reject(new Error(`Timed out waiting for redirect to ${callbackPath}`)),
+			timeoutMs
+		);
+
+		page.route(routeMatcher, async (route) => {
+			clearTimeout(timer);
+			resolve(new URL(route.request().url()));
+			await route.abort();
+		});
+	});
+
+	try {
+		await action();
+		return await callbackPromise;
+	} finally {
+		await page.unroute(routeMatcher);
+	}
+}
+
 export async function getUserCode(
 	page: Page,
 	clientId: string,