- invoices.rs: arm_grin1_rail issues a native Grin invoice slate for every
exact-amount invoice at create time (off the async workers; best-effort) and
stores its armored I1 + slate id.
- checkout.rs: build_info surfaces the invoice slatepack (primary Grin method)
and gates the plain-send address panel behind the render gate.
- pay.html: reworked into a CSS-only two-rail switcher — 'Pay with Goblin'
(nprofile) and 'Pay with any Grin wallet' (invoice slatepack primary,
plain-send address only when the gate allows). Zero-JS meta-refresh + wordmark
header + dark theme preserved; plain QRs; no em dashes.
- style.css: rail switcher styles (hidden radios + :checked sibling combinator).
2ro
b6d0fe4706
