The reliable-delivery layer marks every keystroke as briefly pending until its
ACK lands a few ms later, which made the connection indicator flash
"Sending 1B…" on every character during normal typing. Hide the indicator
entirely while the connection is healthy (connected/connecting) — it now only
appears for an actual problem (reconnecting/offline), where the queued-byte
count reassures the user their input is safely buffered.
Verified in a real browser: hidden throughout connected typing, shows
"Offline (NB queued)" when offline, hides again after reconnect+delivery.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>