Add a purely-local, most-recent-first recents list so users can hop back
into a room they were just in — meaningful now that rooms carry cosmetic
labels.
- src/recents.rs (new): `Recent {name, ticket, joined_at}`, `push_recent`
(de-dupes by room `topic_id`, refresh-and-move-to-front, caps at
RECENTS_MAX=12), `remove_recent`, `relative_time` ("5m ago"). 6 tests.
- PeerSpeakTicket::topic_of — the stable room identity used as the de-dup
key (host addr + label change between members/sessions; topic doesn't).
- AppConfig.recents (`#[serde(default)]`, back-compat) — local UI state,
never sent over the wire.
- Recorded on RoomJoined (label via label_of); rendered as a "Recent
rooms" block in connect_card (each entry → JoinRecent, ✕ → RemoveRecent),
shown only when non-empty.
Rejoin is best-effort by design: the stored ticket only admits us while
the room is still live and reachable (reliability is P6 discovery + the
member-issued ticket floor, not this list).
263 lib tests green, clippy --all-targets clean. Recents UI
screenshot-verified (seeded config → ages + Untitled-room fallback render).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
molluskandClaude Opus 4.8
c12d15ed7d