Payments config (SumUp credentials per page) is a cart concern since all
checkouts go through the cart service. Moves it from events.rose-ash.com
to cart.rose-ash.com/<page_slug>/admin/payments/ and adds a cart admin
overview page at /<page_slug>/admin/.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace all 676 inline sexp() string calls across 7 services with
render(component_name, **kwargs) calls backed by 46 external .sexpr
component definition files (587 defcomps total).
- Add render() function to shared/sexp/jinja_bridge.py
- Add load_service_components() helper and update load_sexp_dir() for *.sexpr
- Update parser keyword regex to support HTMX hx-on::event syntax
- Convert remaining inline HTML in route files to render() calls
- Add shared/sexp/templates/misc.sexp for cross-service utility components
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>