stop crash error

streaming-agent/signaling-server.js

@@ -247,6 +247,12 @@ function startPacat(browserSessId) {
     console.log(`[pacat:${browserSessId}] exited with code ${code}`);
     pacatProcesses.delete(browserSessId);
   });
+  // Prevent EPIPE from crashing the server when pacat exits while we're
+  // still writing to its stdin (e.g. mic frames arriving after disconnect).
+  pacat.stdin.on('error', err => {
+    if (err.code !== 'EPIPE') console.error(`[pacat:${browserSessId}] stdin error: ${err.message}`);
+    pacatProcesses.delete(browserSessId);
+  });
   pacatProcesses.set(browserSessId, pacat);
   return pacat;
 }