Every outbound transfer start and finish can arrive on a hot path while a peer
is serving many file chunks. The Tauri event handler used to rebuild and emit
the full games list for each edge, cloning all games and probing per-game server
script files repeatedly during an active serve.
Batch outbound-transfer count changes behind a short scheduled refresh. The
peer still records exact counts in shared state, and the delayed refresh reads
that state once per burst. A generation counter keeps changes that arrive while
an emit is already scheduled from being lost; they trigger one follow-up emit
with the latest counts.
Test Plan:
- just test
- just clippy
- git diff --check
Refs: Claude review finding #2
ddidderr
7e40cf4bfb