fix: prevent black lock screen on dual-GPU system

- AQ_DRM_DEVICES=/dev/dri/card0 forces Aquamarine to use only the
  Intel iGPU, avoiding EGL_BAD_MATCH errors from the NVIDIA RTX 3060
  after VT/DPMS cycles (page-flip lockups, black display)
- lock.sh: guard against duplicate hyprlock instances (second instance
  steals surfaces, leaves screen black)
- lid-close.sh: same guard for laptop
- wake-display.sh: conditional DPMS cycle (only when display is off)
  to restore hyprlock surfaces without flicker
- unstick-display.sh: emergency recovery script for tty3

hypr/scripts/lid-close.sh

@@ -2,7 +2,7 @@
 pkill -x dim
 hyprctl switchxkblayout all 0
 wpctl set-mute @DEFAULT_AUDIO_SINK@ 1
-hyprlock --no-fade-in &
+pidof hyprlock || hyprlock --no-fade-in &
 hyprctl dispatch dpms off
 wait
 wpctl set-mute @DEFAULT_AUDIO_SINK@ 0