fix: 重试临时外部 API 错误

app/platforms/base.py

@@ -94,15 +94,36 @@ class TikHubClient:
                     status_code=response.status_code,
                 )
             if response.is_error:
-                raise PlatformAPIError(
-                    f"External API returned HTTP {response.status_code}",
-                    error_type="api_error",
-                    status_code=response.status_code,
-                )
+                if attempt >= self.max_retries:
+                    raise PlatformAPIError(
+                        self._format_api_error(response),
+                        error_type="api_error",
+                        status_code=response.status_code,
+                    )
+                time.sleep(2**attempt)
+                continue
             return response.json()
 
         raise PlatformAPIError("External API request failed", error_type="api_error", status_code=last_status)
 
+    def _format_api_error(self, response: httpx.Response) -> str:
+        message = f"External API returned HTTP {response.status_code}"
+        detail = self._response_error_detail(response)
+        return f"{message}: {detail}" if detail else message
+
+    def _response_error_detail(self, response: httpx.Response) -> str | None:
+        try:
+            payload = response.json()
+        except ValueError:
+            text = response.text.strip()
+            return text[:200] if text else None
+        if isinstance(payload, dict):
+            for key in ("message_zh", "message", "error", "detail"):
+                value = payload.get(key)
+                if value:
+                    return str(value)[:200]
+        return None
+
 
 def parse_timestamp(value: Any) -> datetime | None:
     if value in (None, ""):