switched to paddle inline checkout, removed paypal and most of stripe. added product sync between app and paddle.

docs/screenshots/tenant-admin-onboarding/04-order-summary.svg

@@ -9,7 +9,7 @@
       Paket: Pro – 3 Events, 1000 Uploads
     </text>
     <text x="40" y="180" font-size="22" font-family="Inter, Arial, sans-serif" fill="#cbd5f5">
-      Zahlungsart: Stripe oder PayPal
+      Zahlungsart: Stripe oder Paddle
     </text>
     <line x1="40" y1="220" x2="480" y2="220" stroke="#1f2a3d" stroke-width="2"/>
     <text x="40" y="280" font-size="24" font-family="Inter, Arial, sans-serif" fill="#60a5fa">
@@ -44,10 +44,10 @@
   <g transform="translate(660,380)">
     <rect width="480" height="220" rx="24" fill="#ffffff"/>
     <text x="40" y="80" font-size="28" font-family="Inter, Arial, sans-serif" font-weight="600" fill="#0f172a">
-      PayPal Smart Buttons
+      Paddle Checkout Links
     </text>
     <text x="40" y="130" font-size="20" font-family="Inter, Arial, sans-serif" fill="#1f2937">
-      Automatische Darstellung abhängig vom PayPal Client ID.
+      Automatische Darstellung abhängig von der Paddle-Konfiguration.
     </text>
   </g>
 </svg>