[播放平滑修复]：完成可打断播报平滑播放，包含单输出流分块播放和TTS采样率保真

src/owner_voice_pet/protocols.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from collections.abc import Iterable, Sequence
+from collections.abc import Callable, Iterable, Sequence
 from typing import Protocol
 
 from .models import (
@@ -28,6 +28,15 @@ class AudioTransport(Protocol):
     def play_pcm(self, segment: AudioSegment, interrupt: bool = False) -> PlaybackResult:
         ...
 
+    def play_pcm_chunks(
+        self,
+        segment: AudioSegment,
+        *,
+        chunk_ms: int,
+        after_chunk: Callable[[AudioSegment, int], bool] | None = None,
+    ) -> PlaybackResult:
+        ...
+
     def flush_input(self) -> int:
         ...