fix: release input mute after async client tools

backend/services/pipecat/processors.py

@@ -257,8 +257,12 @@ class UserInputProcessor(FrameProcessor):
             return
 
         if self._should_ignore_input():
-            logger.debug("通话正在结束,忽略后续文字输入")
-            await self._emit_result(user_input.input_id, "error", "当前不能接收新的用户输入")
+            logger.debug("当前会话输入已暂停,忽略用户输入")
+            await self._emit_result(
+                user_input.input_id,
+                "error",
+                "当前暂不能接收新的用户输入",
+            )
             return
 
         await self._call_event_handler("on_user_input", user_input)
@@ -438,8 +442,22 @@ class ToolInterruptionUserMuteStrategy(BaseUserMuteStrategy):
         elif isinstance(frame, FunctionCallResultFrame):
             call = self._calls.get(frame.tool_call_id)
             if call is not None:
-                call.tool_finished = True
-                self._release_completed()
+                properties = frame.properties
+                is_final = properties.is_final if properties else True
+                if is_final:
+                    call.tool_finished = True
+                    run_llm = (
+                        properties.run_llm
+                        if properties and properties.run_llm is not None
+                        else frame.run_llm
+                    )
+                    if run_llm is False and not call.response_started:
+                        # A tool-only result has no following bot response whose
+                        # speech boundary could release the mute. If a preamble
+                        # is already playing, BotStoppedSpeakingFrame still owns
+                        # the release so allow_interruptions=False is respected.
+                        call.response_finished = True
+                    self._release_completed()
         elif isinstance(frame, FunctionCallCancelFrame):
             # A canceled call cannot reliably produce a follow-up response.
             self._calls.pop(frame.tool_call_id, None)