fix: interrupt message output before tool result

backend/services/brains/base.py

@@ -95,7 +95,7 @@ class BrainRuntime:
     set_vision_scope: Callable[[dict[str, Any]], None] | None = None
     vision_function: Any = None
     set_input_enabled: Callable[[bool], None] | None = None
-    interrupt_output: Callable[[], Awaitable[None]] | None = None
+    wait_for_output_stopped: Callable[[], Awaitable[None]] | None = None
     apply_turn_config: (
         Callable[[bool, dict[str, Any]], Awaitable[None]] | None
     ) = None

backend/services/brains/workflow_brain.py

@@ -1097,12 +1097,12 @@ class WorkflowBrain(BaseBrain):
                 completion_policy == MESSAGE_CONFIRMATION
                 and result.action == "confirmed"
             ):
-                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()
+                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,