merge with recent branch

Author: SoldierSacha

src/mcp/client/auth.py

@@ -546,9 +546,9 @@ async def async_auth_flow(self, request: httpx.Request) -> AsyncGenerator[httpx.
                     logger.exception("OAuth flow error")
                     raise
 
-                # Retry with new tokens
-                self._add_auth_header(request)
-                yield request
+        # Retry with new tokens
+        self._add_auth_header(request)
+        yield request
 
 
 class ClientCredentialsProvider(httpx.Auth):