Sketcher: Text Tool does not load fonts from the appropriate paths on Linux when using the v26.3.0.dev AppImage

Problem description

Sketcher Text Tool does not load fonts from the appropriate paths on Linux when using the FreeCAD 26.3.0.dev AppImage

Workbench affected?

Sketcher

Steps to reproduce

1. Run the FreeCAD 26.3.0dev AppImage on Linux.
2. Open the Sketcher workbench and create or edit a sketch.
3. Activate the Text tool.
4. Open the font selection list.
5. Observe the fonts available in the list.

Expected behavior

The Text tool should detect and list fonts installed in the user's standard font directories, including $HOME/.local/share/fonts.

Actual behavior

The Text tool only detects fonts from system-wide font directories such as /usr/share/fonts and /usr/local/share/fonts. Fonts installed in the user's standard $HOME/.local/share/fonts directory are not detected.

As a workaround, copying the user-installed fonts to a system-wide font directory makes them available to the Text tool. However, this is not an appropriate solution for user-specific fonts and may require administrative privileges.

Development version About Info (in Safe Mode)

OS: Linux Mint 22.3 (X-Cinnamon/cinnamon/xcb)
Architecture: x86_64
Version: 26.3.0dev.20260720 (Git shallow) AppImage
Build date: 2026/07/20 16:51:42
Build type: Release
Branch: grafted,grafted
Hash: 057d51f846f535f4f0b48492e586be0a76b9efe2
Python 3.11.14, Qt 6.8.3, Coin 4.0.10 (bundled), Pivy 0.6.11 (bundled), Vtk 9.3.1, boost 1_86, Eigen3 3.4.0, PySide 6.8.3
shiboken 6.8.3, xerces-c 3.3.0, Clipper2 , IfcOpenShell 0.8.0, OCC 7.8.1
Locale: English/United States (en_US)
Stylesheet/Theme/QtStyle: OpenDark.qss/FreeCAD Dark/
QPA/File dialog/Color dialog: xcb/via Qt/via Qt
Navigation Style/Orbit Style/Rotation Mode: TinkerCAD/Free Turntable/Drag at cursor
Logical DPI/Physical DPI/Pixel Ratio: 96/95.3202/1
OpenGL version/vendor/renderer: 4.6.0 NVIDIA 580.178.04/NVIDIA Corporation/NVIDIA GeForce GTX 1660/PCIe/SSE2
Installed mods:
  * Dracula 0.0.9
  * Fasteners Workbench 0.5.63
  * FreeCAD-themes 2025.11.25
  * OpenTheme 2025.5.20
  * PieMenu 1.13.0
  * Thread Workbench 0.3.1
  * ThreadProfile 1.99.0

Last known good version (optional)

Not applicable