chore: stabilize pipeline and harden infrastructure

- Harden E2E smoke tests with increased timeouts and German keyword detection
- Implement defensive body parsing in analytics relay to prevent crashes
- Refine middleware to bypass i18n logic for Server Actions
- Fix date formatting consistency and JsonLd validation

lib/config.ts

@@ -66,8 +66,8 @@ function createConfig() {
       port: env.MAIL_PORT,
       user: env.MAIL_USERNAME,
       pass: env.MAIL_PASSWORD,
-      from: env.MAIL_FROM,
-      recipients: env.MAIL_RECIPIENTS,
+      from: env.MAIL_FROM || 'KLZ Cables <postmaster@mg.mintel.me>',
+      recipients: env.MAIL_RECIPIENTS || 'info@klz-cables.com',
     },
     infraCMS: {
       url: env.INFRA_DIRECTUS_URL,