fix: relay confirmation interrupts past muted input

backend/services/brains/workflow_brain.py

@@ -1093,16 +1093,6 @@ class WorkflowBrain(BaseBrain):
             ),
         )
         if result.succeeded:
-            if (
-                completion_policy == MESSAGE_CONFIRMATION
-                and result.action == "confirmed"
-            ):
-                if runtime.wait_for_output_stopped is None:
-                    raise RuntimeError("当前管线不支持等待 Message 确认语音停止")
-                # ClientToolBroker has already broadcast the interruption
-                # before resolving the confirmation. Keep the next node behind
-                # the pipeline and transport playback boundaries.
-                await runtime.wait_for_output_stopped()
             await self._emit_trace(
                 "message_completed",
                 nodeId=node_id,