The reconnect banner showed 'Connection lost'/'Reconnecting' instantly on every
socket close, even ones that recover in 100ms-2s (load spikes, Tailscale/relay
TCP resets). On a healthy node the drops are brief and self-healing, but each one
flashed a jarring banner, reading as constant instability.
Debounce the transient banner by 2.5s: only surface after the connection issue
persists past the grace window; hide immediately on recovery. Deliberate server
lifecycle transitions (restart/shutdown) bypass the debounce and still show at
once. A genuine persistent outage keeps isOffline true and surfaces after 2.5s.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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