Brand view page: first-class "Claim this brand" flow

[pkras]

Problem

The /brand/view/{domain} page surfaces community-hosted brand data but gives no path to claim ownership. You have to know /brand-builder exists — there's no CTA, no ownership status indicator, and no management view after a successful claim.

Proposed changes

Claim CTA

• Add a "Claim this brand" button on /brand/view/{domain} for logged-in users whose org hasn't verified the domain
• Clicking it initiates the DNS challenge flow inline (or deep-links to /brand-builder?domain={domain})

Ownership status

• Show a badge: Community vs Verified — owned by [org]
• Visible to all users so it's clear whether the brand has a verified owner

Post-claim state

• After DNS verification succeeds, the page reflects ownership
• Verified owner sees an edit/management panel
• Other users see read-only with the verified badge

Affected surfaces

• /brand/view/{domain}
• /brand-builder (claim flow target)