feat: rework admin portal with pricing breakdown and document management

- Added pricing snapshot columns to the leads table: daily_subtotal, weekend_subtotal, subtotal_eur, vat_eur, total_eur, deposit_eur, total_days, weekday_count, weekend_day_count.
- Updated create_lead RPC to accept and store new pricing parameters.
- Enhanced frontend app.js to compute and send pricing details during lead creation.
- Introduced new UI elements in admin.html for displaying pricing and documents in a tabbed dialog.
- Updated i18n.js with new translation keys for pricing and document management.
- Improved styles in styles.css for new dialog components and pricing cards.
- Added migration script 06-admin-pricing-documents.sql for database schema changes.

docker-compose.yml

@@ -213,6 +213,7 @@ services:
       - /mnt/user/appdata/mc-cars/supabase/migrations/03-booking-flow.sql:/sql/03-booking-flow.sql:ro
       - /mnt/user/appdata/mc-cars/supabase/migrations/04-kaution-weekend-km.sql:/sql/04-kaution-weekend-km.sql:ro
       - /mnt/user/appdata/mc-cars/supabase/migrations/05-create-lead-rpc.sql:/sql/05-create-lead-rpc.sql:ro
+      - /mnt/user/appdata/mc-cars/supabase/migrations/06-admin-pricing-documents.sql:/sql/06-admin-pricing-documents.sql:ro
     entrypoint: ["sh","-c"]
     command:
       - |
@@ -234,6 +235,7 @@ services:
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/03-booking-flow.sql
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/04-kaution-weekend-km.sql
         psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/05-create-lead-rpc.sql
+        psql "postgresql://postgres:$$PGPASSWORD@db:5432/postgres" -v ON_ERROR_STOP=1 -f /sql/06-admin-pricing-documents.sql
         echo "post-init done."
     restart: "no"
     networks: [mccars]