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/unstick-display.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Recovery script for when Hyprland display goes black after lock/sleep.
+# This resets the display pipeline without killing your session.
+# Run from another TTY (Ctrl+Alt+F3).
+
+export XDG_RUNTIME_DIR=/run/user/$(id -u)
+
+# Find the Hyprland instance signature from the socket directory
+SIGNATURE=$(ls "$XDG_RUNTIME_DIR/hypr/" 2>/dev/null | head -1)
+
+if [ -z "$SIGNATURE" ]; then
+    echo "Could not find Hyprland socket. Is Hyprland running?"
+    exit 1
+fi
+
+export HYPRLAND_INSTANCE_SIGNATURE=$SIGNATURE
+
+echo "Resetting display pipeline..."
+
+pkill hyprlock 2>/dev/null
+hyprctl dispatch dpms off
+sleep 1
+hyprctl dispatch dpms on
+
+echo "Done. Switch back to Hyprland (Ctrl+Alt+F2)."