fix: await message confirmation interruption

backend/services/brains/workflow_brain.py

@@ -19,7 +19,6 @@ from pipecat.flows import (
     NodeConfig,
 )
 from pipecat.frames.frames import (
-    InterruptionFrame,
     LLMRunFrame,
     LLMUpdateSettingsFrame,
     OutputTransportMessageUrgentFrame,
@@ -1098,10 +1097,12 @@ class WorkflowBrain(BaseBrain):
                 completion_policy == MESSAGE_CONFIRMATION
                 and result.action == "confirmed"
             ):
-                # The client-tool result closes the confirmation gate, while
-                # InterruptionFrame closes any speech still owned by this
-                # Message before the next node can enqueue new output.
-                await runtime.queue_frame(InterruptionFrame())
+                if runtime.interrupt_output is None:
+                    raise RuntimeError("当前管线不支持中断 Message 确认语音")
+                # Keep the client-tool result as the confirmation gate, then
+                # wait for the pipeline-owned interruption boundary before the
+                # next node is allowed to enqueue new output.
+                await runtime.interrupt_output()
             await self._emit_trace(
                 "message_completed",
                 nodeId=node_id,