Harden Paddle sandbox flow navigation

tests/ui/purchase/paddle-sandbox-full.test.ts

@@ -17,6 +17,7 @@ const sandboxCard = {
 };
 
 test.use({
+  channel: process.env.E2E_BROWSER_CHANNEL ?? 'chrome',
   userAgent:
     process.env.E2E_USER_AGENT ??
     'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36',
@@ -41,11 +42,7 @@ test.describe('Paddle sandbox full flow (staging)', () => {
 
     await dismissConsentBanner(page);
 
-    // If login/register step is present, choose guest path or continue
+    await proceedToAccountStep(page);
-    const continueButtons = page.getByRole('button', { name: /weiter|continue/i });
-    if (await continueButtons.first().isVisible()) {
-      await continueButtons.first().click();
-    }
 
     await completeRegistrationOrLogin(page, {
       email: tenantEmail!,
@@ -165,6 +162,30 @@ async function completeRegistrationOrLogin(page: Page, credentials: { email: str
   await expect(page.getByPlaceholder(/Gutscheincode|Coupon/i)).toBeVisible({ timeout: 20_000 });
 }
 
+async function proceedToAccountStep(page: Page, timeoutMs = 30_000): Promise<void> {
+  const deadline = Date.now() + timeoutMs;
+
+  while (Date.now() < deadline) {
+    const accountForm = page.locator('input[name="first_name"], input[name="identifier"]');
+    if (await accountForm.isVisible()) {
+      return;
+    }
+
+    await dismissConsentBanner(page);
+
+    const continueButton = page.getByRole('button', { name: /Weiter|Continue/i }).first();
+    if (await continueButton.isVisible()) {
+      if (await continueButton.isEnabled()) {
+        await continueButton.click();
+      }
+    }
+
+    await page.waitForTimeout(500);
+  }
+
+  throw new Error('Account step did not load in time.');
+}
+
 async function completeHostedPaddleCheckout(
   page: Page,
   card: { number: string; expiry: string; cvc: string; name: string; postal: string }