Try plasma manager

common/default.nix

@@ -4,9 +4,10 @@
   imports = with inputs; [
     home-manager.nixosModules.default
     sops-nix.nixosModules.default
-  ] ++ [
     ./constants.nix
     ./secrets.nix
     ./users.nix
   ];
+
+  home-manager.sharedModules = [ inputs.plasma-manager.homeManagerModules.plasma-manager ];
 }

common/users.nix

@@ -21,6 +21,7 @@ in
 
   home-manager = {
     useGlobalPkgs = true;
+    useUserPackages = true;
     users.${usr} = { config, osConfig, pkgs, ... }:
       {
         home = {
@@ -32,7 +33,16 @@ in
             nixpkgs-fmt
             rclone
             sops
-          ];
+          ] ++ (if config.programs.plasma.enable then [
+            sweet-ambar-blue
+            yorha-sound-theme
+          ] ++ (with kdePackages; [
+            qtmultimedia
+            qtstyleplugin-kvantum
+            qtwebchannel
+            qtwebengine
+            qtwebsockets
+          ]) else [ ]);
           stateVersion = osConfig.system.stateVersion;
         };
         programs = {
@@ -71,6 +81,20 @@ in
               theme = "base16_transparent";
             };
           };
+          plasma = {
+            configFile = {
+              "kscreenlockerrc"."Daemon"."Autolock" = false;
+              "kscreenlockerrc"."Greeter"."WallpaperPlugin" = "org.kde.potd";
+            };
+            spectacle.shortcuts.captureRectangularRegion = "Meta+Shift+S";
+            workspace = {
+              colorScheme = "SweetAmbarBlue";
+              cursor.theme = "Sweet-cursors";
+              iconTheme = "Sweet-Rainbow";
+              lookAndFeel = "Sweet-Ambar-Blue";
+              theme = "Sweet-Ambar-Blue";
+            };
+          };
           ripgrep.enable = true;
           starship = {
             enable = true;