Abo: Testkonten zahlen per Rabatt nur 0,50 EUR (ABO_TEST_EMAILS)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/routes/abo.js

@@ -79,6 +79,7 @@ router.get('/', requireSession, async (req, res) => {
     const ledger = sub ? await getLedger(customerId, { active }) : null
     return res.json({
       available: isStripeConfigured() && isPilotAllowed(customer),
+      testAccount: config.abo.testEmails.includes(String(customer?.email || '').toLowerCase()),
       termsVersion: config.abo.termsVersion,
       subscription: publicSubscription(sub),
       ledger,