Upgrade proof URL pages into institutional-grade verification surfaces

[GsCommand]

Goal

Turn /verify/r/* proof URL pages into polished public verification surfaces.

These pages should feel trustworthy enough to share publicly with:

• users
• wallets
• platforms
• registries
• enterprises
• autonomous agents

Scope

Enhance proof URL UX without changing verification semantics.

Required sections

• VERIFIED / INVALID state
• Receipt summary
• Capability/verb detected
• Signer identity
• Receipt hash
• Schema status
• Signature status
• Timestamp
• Raw receipt expandable view
• Copy/share proof URL
• Link back to /verify.html

Optional enhancements

• QR code
• receipt fingerprint styling
• verification timeline/check animation
• public receipt permalink formatting

Constraints

• Do not break existing proof URLs.
• Do not change verifier APIs.
• Preserve backward compatibility.

Acceptance checks

• Existing /verify/r/* links still work.
• Proof pages feel visually aligned with homepage/capabilities/verifier.
• VERIFIED vs INVALID states are immediately obvious.
• Mobile layout remains usable.