feat: update upload functionality and permissions for document handling

- Removed the `upsert` option from the file upload in `uploadDoc` function to prevent unintended overwrites.
- Enhanced German translations in `i18n.js` for better clarity and consistency in the admin interface.
- Added new CSS styles for link interactions to improve user experience in `styles.css`.
- Updated Supabase SQL migration to grant additional permissions for anonymous users to insert and update storage objects, ensuring proper functionality during the booking flow.

Co-authored-by: Copilot <copilot@github.com>

docker-compose.local.yml

@@ -21,6 +21,7 @@ services:
       - ./supabase/migrations/04-kaution-weekend-km.sql:/sql/04-kaution-weekend-km.sql:ro
       - ./supabase/migrations/05-create-lead-rpc.sql:/sql/05-create-lead-rpc.sql:ro
       - ./supabase/migrations/06-admin-pricing-documents.sql:/sql/06-admin-pricing-documents.sql:ro
+      - ./supabase/migrations/07-sales-orders.sql:/sql/07-sales-orders.sql:ro
 
   kong:
     volumes:
@@ -30,3 +31,12 @@ services:
     volumes:
       - ./frontend:/usr/share/nginx/html
       - ./frontend/nginx.conf:/etc/nginx/conf.d/default.conf:ro
+
+  web-admin:
+    volumes:
+      - ./frontend:/usr/share/nginx/html
+      - ./frontend/nginx-admin.conf:/etc/nginx/conf.d/default.conf:ro
+
+  n8n:
+    volumes:
+      - ./data/n8n:/home/node/.n8n