fix(bridge): resolve websocket zombie connection and bounding memory leaks

extension/src/step-probe.ts

@@ -92,6 +92,7 @@ export function resetPendingState(): void {
  * re-detection of WAITING steps whose pending was lost during disconnect.
  */
 export function resetPendingStateForReconnect(): void {
+    if (!ctx) return; // Prevent startup race conditions
     ctx.lastPendingStepIndex = -1;
     ctx.stallProbed = false;
     ctx.sawRunningAfterPending = false;