- Remove all use slog::* imports and log: slog::Logger fields
- Replace slog macros with tracing::{info!, warn!, error!, debug!}
- metrics.rs: upgrade metrics 0.21→0.22, remove register_*! macros,
use functional API: metrics::gauge!(), metrics::counter!(),
metrics::histogram!(), metrics::describe_gauge!() etc.
- RoomMetrics: all fields now use functional metrics API, dynamic
room_id labels passed as owned String to avoid lifetime issues
- RoomService: remove pub log: slog::Logger field
- connection.rs: remove log from subscribe_room_events,
subscribe_project_room_events, subscribe_task_events_fn
- reaction.rs: query before insert to detect new vs duplicate reactions,
only publish Redis event when a reaction was actually added
- room.rs: delete Redis seq key on room deletion to prevent seq
collision on re-creation
- message.rs: use Redis-atomic next_room_message_seq_internal for
concurrent safety; look up sender display name once for both
mention notifications and response body; add warn log when
should_ai_respond fails instead of silent unwrap_or(false)
- ws_universal.rs: re-check room access permission when re-subscribing
dead streams after error to prevent revoked permissions being bypassed
- RoomChatPanel.tsx: truncate reply preview content to 80 chars
- RoomMessageList.tsx: remove redundant inline style on message row div
