fix(auth): update manager app to use dedicated auth backend

Updated SwissOID configuration to use manager-specific auth backend:
- NEXT_PUBLIC_AUTH_BACKEND_URL: https://manager-auth.api.playchoo.com
- NEXT_PUBLIC_SWISSOID_TARGET_SERVICE_HANDLE: playchoo-manager

This separates manager authentication from consumer app authentication
as required by the architecture. Staging uses staging.manager-auth.api.playchoo.com.

.drone.yml

@@ -30,8 +30,8 @@ steps:
       - BUILDKIT_INLINE_CACHE=1
       # Application build arguments
       - NEXT_PUBLIC_PYTHON_API_URL=https://api.playchoo.com
-      - NEXT_PUBLIC_AUTH_BACKEND_URL=https://auth.api.playchoo.com
-      - NEXT_PUBLIC_SWISSOID_TARGET_SERVICE_HANDLE=playchoo
+      - NEXT_PUBLIC_AUTH_BACKEND_URL=https://manager-auth.api.playchoo.com
+      - NEXT_PUBLIC_SWISSOID_TARGET_SERVICE_HANDLE=playchoo-manager
       - NEXT_PUBLIC_APP_VERSION=0.1.0
       - NEXT_PUBLIC_WEBSOCKET_URL=wss://api.playchoo.com
     dockerfile: docker/Dockerfile