v4.2
Code Quality: Enable TreatWarningsAsErrors in some projects & enable "strict" feature flag globally (#18116)
Code Quality: Updated headers
Bump Microsoft.WindowsAppSDK from 2.0.1 to 2.1.3 (#18507)
Code Quality: Update the CI and CDs to use the VS2026-installed runner image (#18295)
Code Quality: Disable self-contained builds for Windows targets (#18229)
Build: v4.2
Feature: Added support for customizing the toolbar (#18276)