chore(home): add elephant service and improve waybar configuration

- Add elephant backend service with systemd user service
- Update walker service to depend on elephant service
- Improve waybar configuration with new modules (tray, bluetooth, battery)
- Add click handlers for network, pulseaudio, and bluetooth
- Update colors and styling for better visibility
- Include gaming-apps in laptop home configuration

home/system/walker/default.nix

@@ -6,24 +6,37 @@
     elephant
   ];
 
+  systemd.user.services.elephant = {
+    Unit = {
+      Description = "Elephant backend service";
+      PartOf = [ "graphical-session.target" ];
+      After = [ "graphical-session.target" ];
+    };
+
+    Service = {
+      ExecStart = "${pkgs.elephant}/bin/elephant";
+      Restart = "on-failure";
+      RestartSec = 5;
+    };
+  };
+
   systemd.user.services.walker = {
     Unit = {
       Description = "Walker application service";
-      After = [ "graphical-session.target" ];
       PartOf = [ "graphical-session.target" ];
+      After = [ "elephant.service" "graphical-session.target" ];
+      Requires = [ "elephant.service" ];
     };
 
     Service = {
       ExecStart = "${pkgs.walker}/bin/walker --gapplication-service";
       Restart = "on-failure";
-    };
-
-    Install = {
-      WantedBy = [ "graphical-session.target" ];
+      RestartSec = 5;
     };
   };
 
   wayland.windowManager.hyprland.settings.exec-once = [
-    "sh -lc 'elephant service enable && systemctl --user start elephant.service'"
+    "dbus-update-activation-environment --systemd --all"
+    "systemctl --user start elephant.service walker.service"
   ];
-}
+}