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

system/modules/tmux.nix

@@ -1,9 +1,31 @@
 { pkgs, config, ... }:
 
 let
-  getIconScript = pkgs.writeShellScript "get-icon" (
-    builtins.readFile ../../home/config/scripts/getIcons.sh
-  );
+  getIconScript = pkgs.writeShellScript "get-icon" ''
+    get_icons() {
+      local session_name="$1"
+      local result=""
+
+      local panes=($(tmux list-panes -t "$session_name" -F '#{pane_current_command}'))
+
+      for i in "''\${panes[@]}"; do
+        case "$i" in
+        nvim) result+=" " ;;
+        zsh | *) result+=" " ;;
+        esac
+      done
+
+      echo "$result"
+    }
+
+    if (($# != 1)); then
+      echo "Usage: $0 <session-name>"
+      exit 1
+    fi
+
+    get_icons "$1"
+  '';
+
   prefixKey = "C-Space";
   tmuxConfigPath = "/etc/tmux.conf";
 in