This issue is mostly for tracking the problem on the platform ui side in the light of the upcoming 4.29.0 release:

• running macOS in dark mode
• starting 2024-12-based spring tools and switching theme to light theme (preview)
• starting 2025-03-based spring tools, selecting the same workspace, theme gets switched back to dark theme (the default since my macOS runs in dark mode)

I filed this issue for platform ui: eclipse-platform/eclipse.platform.ui#2776

Let's see if we can get this fixed in platform ui. If not, we maybe need to implement something specific for spring tools here.