Fix AppImage CI: install libfuse2 for appimagetool

Co-authored-by: ashaduri <2302268+ashaduri@users.noreply.github.com>

.github/workflows/appimage.yml

@@ -23,7 +23,7 @@ jobs:
       run: sudo apt-get update
 
     - name: Install Dependencies
-      run: sudo apt-get install libgtkmm-3.0-dev gettext wget file
+      run: sudo apt-get install libgtkmm-3.0-dev gettext wget file libfuse2
 
     - name: Download linuxdeploy
       # Note: Using 'continuous' release for latest version. For reproducible builds,

packaging/appimage/build-appimage.sh

@@ -7,6 +7,13 @@
 
 # Script to build GSmartControl AppImage
 # This script should be run from the repository root directory
+#
+# Requirements:
+# - cmake, wget, file
+# - libgtkmm-3.0-dev (or equivalent GTK3 development packages)
+# - libfuse2 (required to run linuxdeploy and appimagetool AppImages)
+#   On Ubuntu/Debian: sudo apt-get install libfuse2
+#   On Ubuntu 24.04+: sudo apt-get install libfuse2t64
 
 set -e  # Exit on error
 set -u  # Exit on undefined variable