feat: add ghostty, wallpaper folder, start walker daemon on login

home/duynguyen/config/niri/config.kdl

@@ -83,6 +83,8 @@ layout {
 spawn-at-startup "waybar"
 spawn-at-startup "xwayland-satellite"
 spawn-at-startup "mako"
+spawn-at-startup "walker" "--gapplication-service"
+spawn-at-startup "start-wallpaper"
 
 hotkey-overlay {
     skip-at-startup
@@ -130,7 +132,7 @@ binds {
     Mod+Shift+Slash { show-hotkey-overlay; }
 
     Mod+T hotkey-overlay-title="Open a Terminal: kitty" { spawn "kitty"; }
-    Mod+D hotkey-overlay-title="Run an Application: fuzzel" { spawn "fuzzel"; }
+    Mod+D hotkey-overlay-title="Run an Application: walker" { spawn "walker"; }
     Super+Alt+L hotkey-overlay-title="Lock the Screen: swaylock" { spawn "swaylock"; }
 
     XF86AudioRaiseVolume allow-when-locked=true { spawn-sh "wpctl set-volume @DEFAULT_AUDIO_SINK@ 0.1+ -l 1.0"; }

home/duynguyen/default.nix

@@ -1,5 +1,16 @@
 { config, pkgs, lib, ... }:
 
+let
+  # Picks the first image from ~/.config/wallpapers and sets it via swaybg.
+  # Add images to home/duynguyen/wallpapers/ in the config repo and rebuild.
+  startWallpaper = pkgs.writeShellScriptBin "start-wallpaper" ''
+    f=$(find "$HOME/.config/wallpapers" -maxdepth 1 -type f \
+      \( -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" \
+         -o -name "*.gif"  -o -name "*.webp" -o -name "*.avif" \) \
+      | sort | head -1)
+    [ -n "$f" ] && exec ${pkgs.swaybg}/bin/swaybg -i "$f" -m fill
+  '';
+in
 {
   home.username = "duynguyen";
   home.homeDirectory = "/home/duynguyen";
@@ -15,19 +26,21 @@
     claude-desktop
 
     # Terminals
+    ghostty
     kitty
     foot          # lightweight, good default for Niri
 
     # Niri supporting tools
+    startWallpaper    # picks wallpaper from ~/.config/wallpapers and runs swaybg
     walker            # app launcher
-    elephant          # modular data provider for walker (clipboard, files, niri actions, etc.)
+    elephant          # modular data provider for walker
     fuzzel            # app launcher (alternative)
     waybar
     mako              # notifications
     wl-clipboard      # copy/paste in Wayland terminal
     swaylock          # screen locker
     swayidle          # idle management
-    swaybg            # wallpaper
+    swaybg            # wallpaper setter
     xwayland-satellite # X11 app support in Niri
     xdg-utils         # xdg-open, file associations
     inotify-tools     # filesystem event tools
@@ -90,6 +103,10 @@
   # Wayland natively and work correctly with fcitx5 input
   home.sessionVariables.NIXOS_OZONE_WL = "1";
 
+  # Wallpapers folder — add images to home/duynguyen/wallpapers/ in the repo
+  # and rebuild; swaybg will pick the first one alphabetically
+  xdg.configFile."wallpapers".source = ./wallpapers;
+
   programs.zsh = {
     enable = true;
     autosuggestion.enable = true;