feat: production-ready backend with real Tingwu ASR

backend/oss_uploader.py

@@ -12,9 +12,9 @@ class OSSUploader:
     def __init__(self):
         self.access_key = os.getenv("ALI_ACCESS_KEY")
         self.secret_key = os.getenv("ALI_SECRET_KEY")
-        # 使用杭州区域，听悟服务在杭州
-        self.endpoint = "oss-cn-hangzhou.aliyuncs.com"
-        self.bucket_name = os.getenv("ALI_OSS_BUCKET", "insightflow-audio")
+        self.bucket_name = os.getenv("OSS_BUCKET", "insightflow-audio")
+        self.region = os.getenv("OSS_REGION", "oss-cn-hangzhou.aliyuncs.com")
+        self.endpoint = f"https://{self.region}"
         
         if not self.access_key or not self.secret_key:
             raise ValueError("ALI_ACCESS_KEY and ALI_SECRET_KEY must be set")
@@ -22,8 +22,8 @@ class OSSUploader:
         self.auth = oss2.Auth(self.access_key, self.secret_key)
         self.bucket = oss2.Bucket(self.auth, self.endpoint, self.bucket_name)
     
-    def upload_audio(self, audio_data: bytes, filename: str) -> str:
-        """上传音频到 OSS，返回 URL"""
+    def upload_audio(self, audio_data: bytes, filename: str) -> tuple:
+        """上传音频到 OSS，返回 (URL, object_name)"""
         # 生成唯一文件名
         ext = os.path.splitext(filename)[1] or ".wav"
         object_name = f"audio/{datetime.now().strftime('%Y%m%d')}/{uuid.uuid4().hex}{ext}"