add chinese subtitles

sentence_api/models.py

@@ -12,6 +12,7 @@ class SentenceBoundary(BaseModel):
     end_ms: int = Field(gt=0)
     text: Optional[str] = None
     language: Optional[str] = None
+    zh_text: Optional[str] = None
     reference_speech_duration_ms: Optional[int] = Field(default=None, gt=0)
 
     @model_validator(mode="after")
@@ -126,6 +127,20 @@ class SentenceExplanationResponse(BaseModel):
     explanation: str = Field(min_length=1, max_length=6000)
 
 
+class SubtitleTranslationItem(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    index: int = Field(ge=0)
+    zh_text: str = Field(min_length=1, max_length=4000)
+
+
+class SubtitleTranslationResponse(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    video_hash: str
+    translations: List[SubtitleTranslationItem]
+
+
 class SentenceBoundaryAdjust(BaseModel):
     model_config = ConfigDict(extra="forbid")