[UX/Security] Add live trust indicators and permission states

[shadowbipnode]

Goal

Show clear visual indicators when the current site has NIP-07 permissions.

Current situation

Zap Browser now supports persistent and granular NIP-07 permissions, but the browser UI does not clearly show whether the current site is trusted, denied, or unknown.

Tasks

• Add trust status near the address bar.
• Show different states:
  • unknown site
  • allowed NIP-07 access
  • denied NIP-07 access
  • current page supports NIP-07
• Use the existing permissions table.
• Make the lock/site icon open the Nostr permissions panel.
• Keep the indicator compact and non-invasive.

Acceptance criteria

• Users can immediately see whether the current site has NIP-07 permissions.
• Allowed and denied sites are visually distinguishable.
• Revoking a permission updates the indicator.