feat(marketing): say no card where the trial is actually claimed

Three places still carried the old promise. The register form, which is where
the CTA lands and where the trial is granted, said nothing about it at all, so
the landing page's claim had to be taken on faith across a page load. The
comparison profile summary still described the trial without mentioning the
card. And the CtaLink comment quoted a button label that no longer exists.

The hero and closing CTAs now read 'Open dashboard' for a signed-in visitor.
That button already pointed at /dashboard for them, and offering a free trial
to someone who is mid-subscription reads as a bug. The pricing card keeps the
short label because it sits directly under 'No credit card' and the card
narrows to about 230px at the md breakpoint, where the long label would wrap
out of a fixed-height button.

lib/marketing/comparison-sources.ts

@@ -552,7 +552,7 @@ export const competitorProfiles: Record<string, CompetitorProfile> = {
 export const openFrameProfile = {
   name: 'OpenFrame',
   tagline: 'Fair-source video review and approval with hosted and self-hosted options.',
-  pricingSummary: 'Self-hosted free · Hosted $10/mo after 7-day trial',
+  pricingSummary: 'Self-hosted free · Hosted $10/mo after a 7-day no-card trial',
   trial: '7-day free trial on hosted plan',
   strengths: [
     'Timestamped text, voice, image, and drawn annotations',