Second pass of TRUST_SCORE.md.
- useTrustAssertions now batches: every TrustBadge registers its subject into
a shared per-viewer union and ONE query fetches the union (no per-card
query), with a debounced refetch when a list grows. Same hook API.
- A direct follow (or self) is no longer shown as Verified - only a
friend-of-friend or a provider assertion counts; Flagged is never
suppressed.
- useUserReports reads public NIP-56 reports for an account, and
TrustFlaggedNotice shows a flagged counterparty with the reporters grouped
by the viewer's network plus Report / Dismiss. Wired into the listing
seller card and the coach detail page.
- New walletUi.trust.* keys (en/es).
