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/wake-display.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# hypridle step 3 on-resume — wake display after idle off.
+# Cycles DPMS only if the display was actually turned off (avoids flicker
+# when the user returns before step 3 fires).
+
+SIGNATURE=$(ls "$XDG_RUNTIME_DIR/hypr/" 2>/dev/null | head -1)
+export HYPRLAND_INSTANCE_SIGNATURE=$SIGNATURE
+export XDG_RUNTIME_DIR=/run/user/$(id -u)
+
+DPMS=$(hyprctl monitors 2>/dev/null | grep dpmsStatus | awk '{print $2}')
+
+if [ "$DPMS" = "0" ]; then
+    # Display was off — cycle DPMS to force re-creation of hyprlock surfaces
+    hyprctl dispatch dpms off
+    sleep 1
+fi
+
+hyprctl dispatch dpms on
+ddcutil setvcp 10 100
+wpctl set-mute @DEFAULT_AUDIO_SINK@ 0