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Chris Lu
36e51e5542
* admin: never close the worker outgoing channel while senders are live conn.outgoing has multiple concurrent senders (heartbeat, task assignment, log request, registration handlers). Closing it on connection teardown raced a sender and paniced with "send on closed channel" — reliably reproduced when a laptop goes idle: heartbeats stall past the 2-minute stale cutoff, the cleanup routine closes the channel, and the resumed worker's heartbeat is received and handled at the same moment. The connection context is already the sole teardown signal, so stop closing the channel entirely. handleOutgoingMessages exits on conn.ctx.Done(), and the buffered channel is GC'd once the connection drops. Route sends through a sendToWorker helper that also selects on conn.ctx.Done() so they bail on teardown instead of blocking for the full timeout. * admin: bail on ctx.Done() while waiting for a worker log response