add(ghostty): screensaver!

apps/ghostty/default.nix

@@ -3,6 +3,38 @@
   pkgs,
   ...
 }: {
+  home.packages = [
+    (pkgs.writeShellScriptBin "tte-loop" ''
+      trap 'tput cnorm; exit 0' INT
+      tput civis
+      effects=(beams binarypath blackhole bouncyballs bubbles burn colorshift crumble decrypt errorcorrect expand fireworks highlight laseretch matrix middleout orbittingvolley overflow pour print rain randomsequence rings scattered slice slide spotlights spray swarm sweep synthgrid unstable vhstape waves wipe)
+      while true; do
+        clear
+        cols=$(tput cols)
+        lines=$(tput lines)
+        effect="''${effects[RANDOM % ''${#effects[@]}]}"
+        ${pkgs.terminaltexteffects}/bin/tte --input-file ${config.home.homeDirectory}/.config/nixos/assets/branding.txt --anchor-canvas c --anchor-text c --canvas-width "$cols" --canvas-height "$((lines-1))" --frame-rate 120 "$effect"
+        tput civis
+        sleep 2
+      done
+    '')
+    (pkgs.writeShellScriptBin "tte-screensaver" ''
+      # Start ghostty in background
+      ${pkgs.ghostty}/bin/ghostty --config-file=${config.home.homeDirectory}/.config/ghostty/screensaver --fullscreen -e tte-loop &
+      ghostty_pid=$!
+
+      # Wait a moment for ghostty to start
+      sleep 0.5
+
+      # Monitor for any input and exit when detected
+      ${pkgs.libinput}/bin/libinput debug-events 2>/dev/null | head -n 1 >/dev/null
+
+      # Input detected, kill ghostty
+      kill $ghostty_pid 2>/dev/null
+      wait $ghostty_pid 2>/dev/null
+    '')
+  ];
+
   home.file.".config/ghostty/screensaver".text = ''
     window-padding-x = 0
     window-padding-y = 0