[oleksandrzavarzin-callstack]

Fixes #532. It is a continuation of @thiagobrez's work from #567.

Summary

On iOS 26+, the Liquid Glass tab bar does not draw the UITabBarAppearance background. So scrollEdgeAppearance, translucent={false} and tabBarStyle.backgroundColor had no effect. #567 sets UITabBar.backgroundColor instead.

On iOS 26.5 the glass bar changes its own traits to dark over colored content, so the dynamic .systemBackground became black. This PR resolves the bar color against the window's traits, and applies it again when the light/dark mode changes.

Changes on top of #567:

• The verification artifacts (artifacts/issue-532/) are removed from the repository.
• The branch is merged with main.
• TabViewImpl.swift resolves the bar color with tabBar.window?.traitCollection, and calls updateTabBarAppearance on onChange(of: colorScheme).

Results

Tested on iPhone 17 simulators with a repro that has colored rows under the bar.

Case	1.5.0	#567, iOS 26.5	This PR, iOS 26.5	This PR, iOS 27.0
opaque, translucent={false}, light	glass	dark band	solid white	solid white
opaque, translucent={false}, dark	glass	dark gray band tinted by the content	solid black	solid black
custom color	glass	solid color	solid color	solid color
default, transparent	glass	glass	glass	glass

In dark mode, a light custom color gets light icons, because dark mode uses light label colors.

Screenshots (iOS 26.5)

Rows:

• default
• opaque
• transparent
• translucent false
• color + default
• color + opaque
• color + transparent.

Left: top of the list. Right: bottom of the list.

1.5.0, light	1.5.0, dark

#567, light	#567, dark

This PR, light	This PR, dark