Add migration to prevent Waybar stacking

Bit crude, but better than a full kill.
Closes #196

config/hypr/hypridle.conf

@@ -2,6 +2,7 @@ general {
     lock_cmd = pidof hyprlock || hyprlock       # avoid starting multiple hyprlock instances.
     before_sleep_cmd = loginctl lock-session    # lock before suspend.
     after_sleep_cmd = hyprctl dispatch dpms on  # to avoid having to press a key twice to turn on the display.
+    on_unlock_cmd = pkill -SIGUSR2 waybar       # prevent stacking of waybar when waking
 }
 
 listener {

migrations/1753302134.sh

@@ -0,0 +1,8 @@
+echo "Reload Waybar on unlock to prevent stacking"
+
+if ! grep -q 'on_unlock_cmd *= *pkill -SIGUSR2 waybar' ~/.config/hypr/hypridle.conf; then
+  sed -i '/^general[[:space:]]*{/,/^}/ {
+    /on_unlock_cmd *=/d
+    /^}$/ i\    on_unlock_cmd = pkill -SIGUSR2 waybar       # prevent stacking of waybar when waking
+  }' ~/.config/hypr/hypridle.conf
+fi