daily configuration optimization

Fix
- airplay: systemd wantedBy target
- fcitx5: remove redundant systemd service

Remove
- move scripts into configuration

Style
- ghostty: add more transparency to background

Add
- zellij

helper/default.nix

@@ -0,0 +1,46 @@
+{
+  pkgs,
+  lib,
+}:
+let
+  inherit (pkgs) writeShellScript;
+  inherit (lib) replaceString;
+  inherit (builtins) toJSON mapAttrs;
+in
+{
+  mkToggleScript =
+    {
+      service,
+      start,
+      stop,
+      icon ? "",
+      extra ? { },
+    }:
+    let
+      extraJson = replaceString "\"" "\\\"" (toJSON extra);
+    in
+    writeShellScript "${service}-toggle.sh" ''
+      SERVICE_NAME=${service}
+      EXTRA_JSON="${extraJson}"
+
+      case $1 in toggle)
+        if systemctl --user is-active --quiet "$SERVICE_NAME"; then
+            systemctl --user stop "$SERVICE_NAME"
+            notify-send "${icon} ''\${SERVICE_NAME^}" "stopping"
+        else
+            systemctl --user start "$SERVICE_NAME"
+            notify-send "${icon} ''\${SERVICE_NAME^}" "starting"
+        fi
+      esac
+
+      if systemctl --user is-active --quiet "$SERVICE_NAME"; then
+        json1=$(jq -nc --arg text "${icon} ''\${SERVICE_NAME^} starting" --arg class "${start}" \
+        '{text: $text, tooltip: $text, class: $class, alt: $class}')
+      else
+        json1=$(jq -nc --arg text "${icon} ''\${SERVICE_NAME^} stopped" --arg class "${stop}" \
+        '{text: $text, tooltip: $text, class: $class, alt: $class}')
+      fi
+
+      jq -nc --argjson a "$json1" --argjson b "$EXTRA_JSON" '$a + $b'
+    '';
+}