fix(ssr): right-size the pay modal; fix stale post-create title

The pay wizard modal was w-[50em] (800px) but its bank-account cards are
w-[30em] (480px), so once the CSS rebuild activated the real width it rendered
with a large empty right region — visible especially via the "Pay now" step
after creating an invoice. It had effectively been content-width (~543px) before
and looked fine. Set the pay modal to w-[34em] (544px) so it fits its content
and stays consistent across both pay steps. Verified live: modal is 544px and
the method cards fill it, centered.

Also fix the post-create "next steps" modal's stale header text
("Invoice accounts " -> "Invoice created").

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

resources/public/output.css

@@ -1601,8 +1601,8 @@ input:checked + .toggle-bg {
   width: 30em;
 }
 
-.w-\[50em\] {
-  width: 50em;
+.w-\[34em\] {
+  width: 34em;
 }
 
 .w-\[5em\] {