feat: add NSFW script generation feature and Grok API configuration

qwen3-tts-backend/schemas/user.py

@@ -33,6 +33,7 @@ class User(UserBase):
     is_active: bool
     is_superuser: bool
     can_use_local_model: bool
+    can_use_nsfw: bool = False
     created_at: datetime
 
     model_config = ConfigDict(from_attributes=True)
@@ -41,6 +42,7 @@ class UserCreateByAdmin(UserBase):
     password: str = Field(..., min_length=8, max_length=128)
     is_superuser: bool = False
     can_use_local_model: bool = False
+    can_use_nsfw: bool = False
 
     @field_validator('password')
     @classmethod
@@ -60,6 +62,7 @@ class UserUpdate(BaseModel):
     is_active: Optional[bool] = None
     is_superuser: Optional[bool] = None
     can_use_local_model: Optional[bool] = None
+    can_use_nsfw: Optional[bool] = None
 
     @field_validator('username')
     @classmethod