Private spots can't be domain-verified like shops, so ownership is a gated
two-step flow — never an instant takeover:
- A NIP-05-verified user files a claim (kind 1985 label in the separate
org.skatespots.spotclaim namespace) on a spot marked access=private.
- A moderator approves by publishing claim-approved (moderation namespace,
a=coord + p=claimant); surfaced in a pending-claims list atop /review.
- The claimant then finishes by re-publishing the spot with
claim-reason=private-approved (existing claim mechanism).
Adds useSpotClaims/useApprovedSpotClaims/useAllSpotClaims/useSubmitSpotClaim,
useAdminApproveClaim, the private branch in SpotOwnership, i18n, and docs.
Non-private spots keep the abandoned-claim flow. Nothing is auto-transferred.
