Add GUI configuration

modules/gui.nix

@@ -0,0 +1,56 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Display manager
+  service.xserver.displayManager = {
+    defaultSession = "sway";
+    sddm = {
+      enable = true;
+      autologin = {
+        enable = true;
+        user = "coolneng";
+      };
+    };
+  };
+
+  # Window manager
+  programs.sway = {
+    enable = true;
+    extraPackages = with pkgs; [
+      xwayland
+      swaylock
+      swaybg
+      rofi
+      waybar
+      clipman
+      grim
+      slurp
+      brillo
+      imv
+      kanshi
+      redshift-wlr
+    ];
+    extraSessionCommands = ''
+      export MOZ_ENABLE_WAYLAND=1
+      export MOZ_DBUS_REMOTE=1
+      export GRIM_DEFAULT_DIR=/home/coolneng/Photos/Screenshots
+      export _JAVA_AWT_WM_NONREPARENTING=1
+      export QT_QPA_PLATFORM=wayland
+      export QT_WAYLAND_DISABLE_WINDOWDECORATION="1"
+      export SDL_VIDEODRIVER=wayland
+    '';
+  };
+
+  # Blue light filter
+  services.redshift = {
+    package = pkgs.redshift-wlr;
+    enable = true;
+    temperature = {
+      day = 6500;
+      night = 5500;
+    };
+  };
+
+  # Bar
+  programs.waybar.enable = true;
+}