test: 同步 develop TTS 预览接口新增 style/pitch 参数的断言

develop 上 TTS preview 新增 style、pitch 参数透传，补齐对应单测断言
Merge branch 'origin/develop' into feat/2001-booming-title-style

tests/unit/test_tts_preview.py

@@ -102,7 +102,9 @@ class TestTTSPreviewEndpoint:
             voice_id="longxiaochun",
             speed=1.0,
             emotion="",
+            style="",
             language="zh-CN",
+            pitch=1.0,
         )
 
     def test_preview_with_speed(self):
@@ -149,7 +151,9 @@ class TestTTSPreviewEndpoint:
             voice_id="v1",
             speed=1.5,
             emotion="",
+            style="",
             language="zh-CN",
+            pitch=1.0,
         )
 
     def test_preview_cosyvoice_error_returns_502(self):
@@ -335,7 +339,9 @@ class TestTTSPreviewEndpoint:
             voice_id="cosyvoice_actual_voice_123",
             speed=1.0,
             emotion="",
+            style="",
             language="zh-CN",
+            pitch=1.0,
         )
         # Verify repo was queried with the UUID
         mock_clone_repo.get.assert_called_once_with("abc123-uuid-of-profile")
@@ -413,7 +419,9 @@ class TestTTSPreviewEndpoint:
             voice_id="longxiaoxia_v3",
             speed=1.0,
             emotion="",
+            style="",
             language="zh-CN",
+            pitch=1.0,
         )
 
     def test_preview_clone_voice_wrong_user_returns_403(self):