[结束提示音优化]：完成Codex通知音资产内置，包含音频提取、配置默认值和回归测试

tests/test_live_runtime.py

@@ -272,7 +272,9 @@ class LiveRuntimeTests(unittest.TestCase):
         self.assertEqual(len(transport.played_segments), 6)
         self.assertEqual(transport.flush_count, 6)
         self.assertEqual(transport.played_segments[2].metadata["chime"], "end")
+        self.assertEqual(transport.played_segments[2].metadata["source"], "file")
         self.assertEqual(transport.played_segments[5].metadata["chime"], "end")
+        self.assertEqual(transport.played_segments[5].metadata["source"], "file")
         self.assertEqual(reporter.transcripts, ["第一问", "第二问"])
         self.assertIn("应答中：我在", reporter.statuses)
         self.assertLess(reporter.statuses.index("唤醒命中"), reporter.statuses.index("应答中：我在"))
@@ -339,6 +341,7 @@ class LiveRuntimeTests(unittest.TestCase):
         self.assertEqual(len(stt.calls), 1)
         self.assertEqual(transport.flush_count, 3)
         self.assertEqual(transport.played_segments[-1].metadata["chime"], "end")
+        self.assertEqual(transport.played_segments[-1].metadata["source"], "file")
 
     def test_no_ack_text_does_not_drain_before_capture(self) -> None:
         runtime, stt, _, transport, reporter = make_runtime(["第一问"], wake_ack_text="")
@@ -351,6 +354,18 @@ class LiveRuntimeTests(unittest.TestCase):
         self.assertEqual(len(transport.played_segments), 2)
         self.assertEqual(transport.flush_count, 2)
         self.assertEqual(transport.played_segments[-1].metadata["chime"], "end")
+        self.assertEqual(transport.played_segments[-1].metadata["source"], "file")
+
+    def test_end_chime_can_be_disabled(self) -> None:
+        runtime, _, _, transport, _ = make_runtime(["第一问"], wake_ack_text="")
+        runtime.config = AppConfig(llm_api_key="secret", speech_provider="cloud", wake_ack_text="", end_chime_enabled=False)
+        runtime.controller.config = runtime.config
+
+        summary = runtime.run(max_turns=1)
+
+        self.assertEqual(summary.completed_turns, 1)
+        self.assertEqual(len(transport.played_segments), 1)
+        self.assertNotIn("chime", transport.played_segments[-1].metadata)
 
     def test_temporary_context_is_sent_to_second_llm_call(self) -> None:
         runtime, _, llm, _, _ = make_runtime(["第一问", "第二问"])
@@ -598,6 +613,7 @@ class LiveRuntimeTests(unittest.TestCase):
         self.assertEqual(event_types[-1], STANDBY_RESUMED)
         self.assertEqual(len(llm.calls), 1)
         self.assertEqual(transport.played_segments[-1].metadata["chime"], "end")
+        self.assertEqual(transport.played_segments[-1].metadata["source"], "file")
 
     def test_completed_reply_returns_to_standby_without_cloud_classifier_delay(self) -> None:
         frames = [wake_frame(0, 0)]