pi: auto-retry stalled requests

♠ Previously . Problem statement : sometimes a prompt in pi just hangs, as if the network dropped. It never recovers on its own — I have to hit Esc and re-prompt. It&rsquo;s 2026, this symptom should be self-recoverable. Pi already has agent-level retry on transient errors ( retry.enabled defaults to true ). The catch is when it fires: a stalled connection isn&rsquo;t an error until the HTTP idle…