The tavern used ephemeral, room-scoped chat with no backlog, so entering it
showed a blank log. Wire it to the shared global chat provider instead:
- TavernManager takes a globalChatProvider (the lobby's chat provider) and
publishes tavern messages to the 'global' scope, so tavern + lobby share ONE
conversation that persists to Postgres and (when NOSTR_CHAT_ENABLED) fans out
over relay.smirk.cash. Falls back to the old tavern-scoped ephemeral provider
when none is injected.
- On join, the tavern sends the recent global backlog (chat_history) to the
joiner so history shows immediately.
- tavern.html: render chat_history on join and accept global-scope broadcasts
(not just this room's), so lobby<->tavern messages flow both ways.
Tests: +3 (join sends backlog, chat routes to global scope, legacy fallback
stays tavern-scoped). Suite 55 suites / 394 tests green.
jwinterm
ebf14560dd