r26.04.1

This release mostly consists of improvements and bug fixes for the new colors module. In particular, the colors module could select atmosphere metallicity from Zbase instead of photospheric [M/H]. This could return solar-metallicity colors and SEDs for non-solar models. We recommend that anyone using the new colors module upgrade to this release. Additionally, various new controls for TDC have been made available to bring it closer into alignment with the RSP module. An overview of the TDC and RSP modules and how they compare can be found in Farag et al. (2026). As usual, the full list of changes can be found in the changelog.