fix(web): address steering review feedback

packages/client/runtime/src/client/sessions/session.ts

@@ -650,9 +650,20 @@ export class Session implements SessionFace {
     this.events.push(event)
     this.views.push(view)
     this.transcript.append(event, view)
+    this.handoffPendingSteering(event)
     this.applyEventSideEffects(event, view)
   }
 
+  /** Retire the first matching live steering occurrence when its durable event takes over. */
+  private handoffPendingSteering(event: SessionEvent): void {
+    if (event.type !== 'steering/message') return
+    const index = this.queued.findIndex(item =>
+      item.placement === 'steering' && item.messageId === event.data.message.id)
+    if (index === -1) return
+    this.queued = this.queued.filter((_item, candidate) => candidate !== index)
+    this.queueRev++
+  }
+
   /** Land a live session/event (open/repair in flight -> buffer; overlapping seq -> drop;
    *  a seq gap -> buffer + tail-page repull instead of appending a hole (audit S3: a gap is an
    *  expected reconnect-window artifact, repaired by refetch). The window stays one contiguous