fix: show sync failures on hover and preserve browser error details

browser_gateway/server/http.py

@@ -172,12 +172,14 @@ class Gateway:
                 response = self.browser.get(alias, input["url"])
                 self._require_douyin_generation(alias, input)
             except DouyinError as exc:
-                LOG.warning(
-                    "Douyin GET failed alias=%s reason=%s",
+                LOG.exception(
+                    "Douyin GET failed alias=%s binding_version=%s url=%s reason=%s",
                     alias,
+                    input["binding_version"],
+                    input["url"],
                     str(exc),
                 )
-                raise RequestError("restricted browser operation failed") from exc
+                raise RequestError(f"restricted browser operation failed: {exc}") from exc
         return {
             "status": response.status,
             "body": response.body,