make env variables syste-wide; disable plasma but leave some confiuration for kde apps

fuji/configuration.nix

@@ -221,20 +221,22 @@ in
       android-tools
       river
     ];
-
     sessionVariables = {
       LIBVA_DRIVER_NAME = "iHD";
       KWIN_COMPOSE = "O2ES";
+      WLR_RENDERER = "vulkan";
+      NIXOS_OZONE_WL = "1";
+      MOZ_ENABLE_WAYLAND = "1";
+      QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
+      _JAVA_AWT_WM_NONREPARENTING = "1";
     };
 
     etc = {
       "firejail/qutebrowser.local".text = ''
         whitelist ''${RUNUSER}/qutebrowser
       '';
-      "xdg/autostart/powerdevil.desktop".text = ''
-        [Desktop Entry]
-        Hidden=true
-      '';
+      "xdg/menus/applications.menu".source =
+        "${pkgs.kdePackages.plasma-workspace}/etc/xdg/menus/plasma-applications.menu";
     };
     extraInit = ''
       unset -v SSH_ASKPASS
@@ -276,6 +278,7 @@ in
     enable = true;
     wlr.enable = true;
     config.river.default = [ "wlr" "gtk" ];
+    extraPortals = [ pkgs.kdePackages.xdg-desktop-portal-kde ];
   };
 
   documentation.dev.enable = true;
@@ -361,7 +364,7 @@ in
     };
 
     desktopManager = {
-      plasma6.enable = true;
+      plasma6.enable = false;
     };
 
     pipewire = {