* Fix muted traffic lights and sidebar texture discontinuity
Move background blur and tint overlays back into contentView (from
themeFrame) to eliminate the two-texture sidebar issue on older macOS.
Use layer.zPosition = -1000 to prevent SwiftUI subview reordering from
visually covering terminal content, and PassthroughBlurView/PassthroughView
subclasses to ensure mouse events pass through.
* Bump version to 1.26.0
4ef61cca4e