[Birfy]

Fixes #304

What / why (per the Owner decision on #304, 2026-10-20)

• Titles list everyone. A home that stayed (status Closed) stored its Past row from Bot Social's live member list, so the person who left vanished ("Face-to-face · SelfA0056 · 482915" while the header showed both). faceRoomTitle now takes the snapshot's members plus every participant the hosted room ever had (as the core title does, Face-to-face: avatars and room title differ per home (regressions of #137/#172); Leave is abrupt and not seen by the peer #182), and viewHostedFace for a closed/left room lists all participants (left: true on who had left; opening a dropped room seats only the others again). Rows stored before this are refreshed from their hosted room.
• Each row shows its time (data-flybot=face-time): endedAt (set once by rememberPastFace), else start/creation time. Today 14:05, an earlier day Oct 19; hover shows Ended Oct 19 14:05.
• The whole row opens the room (click, or Enter/Space; role=button); the separate Open button is gone.
• The Past rooms fold remembers open/closed across reload (localStorage flybot.social.pastRoomsOpen, failures fall back to folded).

Test

• New/updated tests in plugins/social/test/social.test.js: host test (last peer leaves → Past row named Danyang, Bob, Bob's Bot left: true, stable endedAt across polls), row time, row click/keyboard open with no Open button, fold persistence, title with a member who left. 7 of them fail on main.
• ARCH_DOCS_BASE=origin/main TZ=UTC npm run verify: pass (core 1017, social 279, tree 80, timeline 80, scripts 88, interop 37, live-e2e 16; 0 failures).
• Not run: live two-home self-test on the Mac instances.

Risk tier: T3 (estimate; the controller sets the label). Touches plugins/social/src/**.

[Birfy]

Self-review: PASS
Tip SHA: d4d414a
Ran:

• ARCH_DOCS_BASE=origin/main TZ=UTC npm run verify at the tip: pass, 0 failures (core 1017, plugins/social 279, tree 80, timeline 80, .github scripts 88, interop 37, live-e2e 16; core + plugin lint, arch-docs OK, build-client check, ds-bot patches check)
• node .github/scripts/changelog.mjs check: 4 fragments well formed
• The new Face room titles/Past rooms: number dropped from title, Past rows show start or future deadline time, staying home marked 'Left' and never leaves on Bot Social, closed tab title (#250 regression) #304 tests fail on main without the src/client change (7 failures) and pass with it
• CI at the tip: tests-ok, test, plugins (social/tree/timeline), package all green; risk tier T3 (plugins/social/src/**)
• Diff re-read against the owner design rules and the Face room titles/Past rooms: number dropped from title, Past rows show start or future deadline time, staying home marked 'Left' and never leaves on Bot Social, closed tab title (#250 regression) #304 Owner decision: all participants in Past titles, each row shows its time, the whole row opens the room (no separate Open button, keyboard works), fold state survives reload; English UI; no approval, grant, connector or publish behavior changed; scope kept to Face room titles/Past rooms: number dropped from title, Past rows show start or future deadline time, staying home marked 'Left' and never leaves on Bot Social, closed tab title (#250 regression) #304 (never-joined rooms stay with Face room lifecycle: wrong number silently opens a room, countdowns differ, leave closes room for all, room leaks into Chief preview, number hidden #458)
  Not run:
• Live two-home face-to-face self-test on the Mac instances (not restarted or redeployed by rule)
• Smoke test (dev/smoke.mjs)