fix: update fonts configuration for NixOS changes

- Rename fonts.fonts to fonts.packages (deprecated option)
- Add cantarell-fonts (GNOME default) and ubuntu-classic for better font coverage
- Should resolve QEMU font warnings for DejaVu Sans Mono

common.nix

@@ -1207,14 +1207,12 @@ isoConfig
   };
 
   # Font packages for GUI rendering (QEMU GTK display)
-  fonts.fonts = with pkgs; [
+  fonts.packages = with pkgs; [
     dejavu_fonts
     liberation_ttf
     noto-fonts
-    # Additional fonts for QEMU compatibility
-    freefont_ttf
-    ubuntu_font_family
-    cantarell-fonts
+    cantarell-fonts  # GNOME default font
+    ubuntu-classic  # Additional font for compatibility
   ];
 
   # GUI Configuration