fix: clamp poll sleep duration to non-negative in bash-tools process (#24889)

`Math.min(250, deadline - Date.now())` could return a negative value if
the deadline expired between the while-condition check and the setTimeout
call. Wrap with `Math.max(0, ...)` to ensure the sleep is never negative.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

src/agents/bash-tools.process.ts

@@ -331,7 +331,7 @@ export function createProcessTool(
             const deadline = Date.now() + pollWaitMs;
             while (!scopedSession.exited && Date.now() < deadline) {
               await new Promise((resolve) =>
-                setTimeout(resolve, Math.min(250, deadline - Date.now())),
+                setTimeout(resolve, Math.max(0, Math.min(250, deadline - Date.now()))),
               );
             }
           }