DrSmoothl
e8cb49ced9
Arm receive monitoring only after an existing QQ heartbeat has been observed, preserving compatibility with sessions that do not expose the signal. Require 90 seconds of receive silence plus a 15-second confirmation window before reporting degradation. Any later inbound frame refreshes or restores health, including non-routable frames that still prove the receive path is alive. Bind watchdog state to the active account epoch so direct login switches and packet-driven account migration cannot inherit stale deadlines from a previous account. Forward health transitions to the bridge layer without reconnecting, reinjecting, or otherwise changing session recovery behavior. Add regression coverage for arming, recovery, sleep-resume confirmation, account migration, and invalid-UIN frames. Refs #233.