feat(ghostty): launch tmux by default via command config

Set Ghostty to use the tmux wrapper as its default command,
simplify the Niri terminal binding to launch Ghostty directly,
and update the wrapper to attach or create sessions based on active tmux clients.

Author: sabertazimi

dot_config/ghostty/config

@@ -58,3 +58,6 @@ theme = dankcolors
 
 # Shader
 custom-shader = shaders/cursor_warp.glsl
+
+# Command
+command = $HOME/.local/bin/ghostty-tmux.sh

dot_config/niri/dms/binds.kdl

@@ -12,7 +12,7 @@ binds {
     Mod+M hotkey-overlay-title="Music Player" { spawn "/opt/SPlayer/SPlayer"; }
     Mod+N hotkey-overlay-title="Notification Center" { spawn "dms" "ipc" "call" "notifications" "toggle"; }
     Mod+S hotkey-overlay-title="Code Editor" { spawn "code"; }
-    Mod+T hotkey-overlay-title="Open Terminal" { spawn "sh" "-c" "$HOME/.local/bin/ghostty-tmux.sh"; }
+    Mod+T hotkey-overlay-title="Open Terminal" { spawn "ghostty"; }
     Mod+X hotkey-overlay-title="Power Menu: Toggle" { spawn "dms" "ipc" "call" "powermenu" "toggle"; }
     Mod+Y hotkey-overlay-title="Browse Wallpapers" { spawn "dms" "ipc" "call" "dankdash" "wallpaper"; }
     Mod+Shift+C hotkey-overlay-title="Clipboard Manager" { spawn "dms" "ipc" "call" "clipboard" "toggle"; }

dot_local/bin/executable_ghostty-tmux.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-if pgrep -x "ghostty" >/dev/null; then
-  ghostty -e sh -c "tmux new-session \; set-option destroy-unattached on" &
+if tmux list-clients -F '#{client_pid}' 2>/dev/null | grep -q .; then
+  tmux new-session \; set-option destroy-unattached on
 else
-  ghostty -e sh -c "tmux attach || tmux" &
+  tmux attach-session || tmux new-session
 fi