i3 worked!

flakes/common/nix_modules/de_i3.nix

@@ -5,6 +5,19 @@
   ...
 }:
 {
+  # Caps Lock as Escape for console/tty and Wayland
+  console.useXkbConfig = true;
+  services.xserver.xkb = {
+    layout = "us";
+    options = "caps:escape";
+  };
+
+  xdg.portal = {
+    enable = true;
+    extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
+    config.common.default = [ "gtk" ];
+  };
+
   services.xserver = {
     enable = true;
     # displayManager.startx.enable = true;
@@ -15,36 +28,24 @@
         dmenu
         i3status
         i3lock
+        maim
+        xclip
       ];
     };
     desktopManager = {
-      xterm.enable = true;
-      xfce = {
-        enable = true;
-        noDesktop = true;
-        enableXfwm = false;
-      };
+      # xterm.enable = false;
+      # xfce = {
+      #   enable = true;
+      #   noDesktop = true;
+      #   enableXfwm = false;
+      # };
     };
     displayManager = {
-      # lightdm.enable = true;
-      defaultSession = "xfce+i3";
+      lightdm.enable = true;
+      defaultSession = "none+i3";
+      # defaultSession = "xfce+i3";
     };
   };
 
-  services.greetd = {
-    enable = true;
-    vt = 2;
-    settings = {
-      default_session = {
-        command = "${pkgs.greetd.tuigreet}/bin/tuigreet --time --remember --remember-session --cmd '${pkgs.dbus}/bin/dbus-run-session ${pkgs.xorg.xinit}/bin/startx ${pkgs.xfce.xfce4-session}/bin/startxfce4 -- ${pkgs.xorg.xorgserver}/bin/X -keeptty -quiet vt${toString config.services.greetd.vt}'";
-        user = "greeter";
-      };
-    };
-  };
-
-  xdg.portal = {
-    enable = true;
-    extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
-    config.common.default = [ "gtk" ];
-  };
+  hardware.graphics.enable = true;
 }

flakes/common/nix_modules/de_sway.nix

@@ -6,6 +6,25 @@
 }:
 
 {
+  # Caps Lock as Escape for console/tty and Wayland
+  console.useXkbConfig = true;
+  services.xserver.xkb = {
+    layout = "us";
+    options = "caps:escape";
+  };
+
+  xdg.portal = {
+    enable = true;
+    extraPortals = lib.mkForce [
+      pkgs.xdg-desktop-portal-wlr
+      pkgs.xdg-desktop-portal-gtk
+    ];
+    config.common.default = [
+      "wlr"
+      "gtk"
+    ];
+  };
+
   services.greetd = {
     enable = true;
     vt = 2;
@@ -17,13 +36,6 @@
     };
   };
 
-  # Caps Lock as Escape for console/tty and Wayland
-  console.useXkbConfig = true;
-  services.xserver.xkb = {
-    layout = "us";
-    options = "caps:escape";
-  };
-
   # Core packages and tools
   environment.systemPackages = with pkgs; [
     wl-clipboard
@@ -55,18 +67,6 @@
     ];
   };
 
-  xdg.portal = {
-    enable = true;
-    extraPortals = lib.mkForce [
-      pkgs.xdg-desktop-portal-wlr
-      pkgs.xdg-desktop-portal-gtk
-    ];
-    config.common.default = [
-      "wlr"
-      "gtk"
-    ];
-  };
-
   # Enable PipeWire + WirePlumber so xdg-desktop-portal can do screencast
   services.pipewire = {
     enable = true;