File dialog text unreadable with Breeze Dark theme (black on black)

[daniil-chepela]

Current Behaviour

The file dialogs (Save As, Open, etc.) in Fritzing display black text on a black background when using the Breeze Dark theme on KDE Plasma, making the text completely unreadable.

Build:
Version 1.0.6-l2239-04e5bb02 (Qt6 AppImage)

Operating System:
Kubuntu 25.10 (KDE Plasma 6.4.5 with Breeze Dark theme)

Steps to reproduce:

• Step 1: Use KDE Plasma desktop environment with Breeze Dark theme enabled
• Step 2: Launch Fritzing
• Step 3: Attempt to open File → Save As (or any file dialog)
• Step 4: Observe that text in the file dialog is black on black background and unreadable

Expected Behaviour

File dialogs should display readable text with proper contrast, respecting the system's dark theme or defaulting to a light color scheme for the dialog if dark theme support is incomplete.

Additional Information:

• Switching the system theme to Breeze Light resolves the issue, confirming it's specific to Breeze Dark
• Attempted workarounds that did NOT work:
  • Setting QT_QPA_PLATFORMTHEME=kde environment variable
  • Setting QT_STYLE_OVERRIDE=Fusion
  • Setting KDEGLOBALS to BreezeLight.colors path
  • Creating wrapper scripts with various Qt environment variables
  • Installing qt6ct and configuring light themes
• The issue appears to be with Qt6 file dialogs not properly inheriting the light color scheme when the parent application runs under a dark system theme

[daniil-chepela]

Interestingly, when the app crashed and I was prompted to save recovered session on the next launch, the file dialog looked as follows:

[KjellMorgenstern]

Ok, so there was something wrong beyond the text color?

A crash would be more concerning than a wrong color. Do you have any context or can you even reproduce the crash?

[daniil-chepela]

Basically the crash happened after I worked on pcb design for a while, put the computer to sleep without closing the app, woke the pc up and continued my work. I don't know the exact steps to reproduce the crash but if there is a guide on how to access logs/debug messages then I can file a proper issue. I can say the crash is definitely not related to colors.

The crash happened for the first time after I'd already filed the color issue. At that point, I was only aware of the color problem.