feat(ghostty-tmux): add smart tmux wrapper script

Launch tmux only on first Ghostty instance,
avoiding nested tmux sessions.
Remove direct tmux command from Ghostty config
in favor of the wrapper approach.

Author: sabertazimi

.github/scripts/verify-dotfiles.sh

@@ -39,6 +39,7 @@ FILES=(
   "$HOME/.config/television/cable/aur.toml"
   "$HOME/.config/tmux/tmux.conf"
   "$HOME/.gitmsg.md"
+  "$HOME/.local/bin/ghostty-tmux.sh"
   "$HOME/.local/share/fcitx5/rime/default.custom.yaml"
   "$HOME/.local/state/DankMaterialShell/session.json"
   "$HOME/.ripgreprc"

dot_config/ghostty/config

@@ -55,4 +55,3 @@ keybind = alt+h=goto_split:left
 keybind = alt+j=goto_split:down
 keybind = alt+k=goto_split:up
 keybind = alt+l=goto_split:right
-command = tmux attach || tmux

dot_config/niri/dms/binds.kdl

@@ -11,7 +11,7 @@ binds {
     Mod+Shift+Slash { show-hotkey-overlay; }
 
     // === Application Launchers ===
-    Mod+T hotkey-overlay-title="Open Terminal" { spawn "ghostty"; }
+    Mod+T hotkey-overlay-title="Open Terminal" { spawn "sh" "-c" "$HOME/.local/bin/ghostty-tmux.sh"; }
     Mod+D hotkey-overlay-title="Application Launcher" {
         spawn "dms" "ipc" "call" "spotlight" "toggle";
     }

dot_local/bin/executable_ghostty-tmux.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+if pgrep -x "ghostty" >/dev/null; then
+  ghostty &
+else
+  ghostty -e sh -c "tmux attach || tmux" &
+fi