Report preparation

• I used the AI-assisted bug report tool (Help → Support → File an Issue)
• I have attached a support bundle or log file

What happened?

I built on Windows 11 MSVC 2022 with no errors and noticed that the light blue filter shading is gone. Clicking the Filter Edge button to on or off shows no change other than the high-side blue vertical line representing the filter edge does toggle. It's just the filter coloring is gone. Tried this with release Claude-compiled 26.5.3 and the filter shading was normal so this must have been from a change since that release.

What did you expect?

Filter shading to be shown overlaying spectrum but not at 100% opacity

aethersdr-20260530-130349.log

Steps to reproduce

1. Git pll latest code
2. Run compled/linked build 5a2c0e6
3. Look at spectrum, no filter shading

AetherSDR version

5.2.3 but commit 5a2c0e6

Radio model & firmware

Flex 6600

Operating system

Windows

OS version and hardware

win 11 25 h2