- RelayMetadata.dmRelays; Relays UI to add/remove, publishing kind 10050
- NostrSync fetches the user's 10050 on login (alongside 10002)
- DMs deliver gift wraps to recipients' + own DM relays (fallback: write relays)
and read from own DM relays + NIP-65 read relays
- useDmRelays() to look up others' DM relay lists
Also fixes a latent data-loss bug: NostrSync's 10002 fetch replaced
relayMetadata wholesale, which would wipe the new local/blocked/dm lists on
login — it now merges. 'Trusted' category intentionally skipped (no distinct
behaviour -> no empty UI); documented in AGENTS.md.
