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## 4.45.9

**`(fix):`** Fix empty query params stripping existing URL query strings. When `params` and
`additional_query_parameters` are both empty, httpx now receives `params=None` instead
of `params=[]`, preserving any query parameters already present in the URL (e.g.,
pagination cursors like `?after=123`).

## 4.45.8

**`(fix):`** Ensures the root client always exposes a headers parameter and forwards it to the underlying ClientWrapper.

## 4.45.7

**`(fix):`** Fix client wrapper instantiation to use the correct bearer token parameter name, preventing incorrect `token=` references when custom auth parameter names are configured.