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/hypridle.conf

@@ -2,7 +2,10 @@ general {
     inhibit_sleep = 3
     lock_cmd = pidof hyprlock || ~/.config/hypr/scripts/lock.sh
     before_sleep_cmd = loginctl lock-session
-    after_sleep_cmd = hyprctl dispatch dpms on
+    # Cycle dpms off/on after resume: forces Hyprland to recreate the hyprlock
+    # surfaces and re-grant them keyboard focus, which is otherwise lost after
+    # suspend (hyprlock shows the clock but ignores typing until a dpms cycle)
+    after_sleep_cmd = hyprctl dispatch dpms off && sleep 1 && hyprctl dispatch dpms on
 }
 
 # Step 1: Dim monitor at 115 sec idle (warning that it will lock soon)
@@ -33,13 +36,19 @@ listener {
     # Both together ensure the screen is fully off visually and electrically
 
     # When the user becomes active again, restore display
-    on-resume = hyprctl dispatch dpms on && ddcutil setvcp 10 100 && wpctl set-mute @DEFAULT_AUDIO_SINK@ 0
+    #
+    # Cycles DPMS only if the display was actually turned off (avoids flicker
+    # when the user returns before step 3 fires). Needed because otherwise
+    # hyprlock surfaces may lose focus after a dpms off cycle
+    # (same issue covered in after_sleep_cmd above).
+    on-resume = ~/.config/hypr/scripts/wake-display.sh
 
     # Explanation:
-    # - hyprctl dispatch dpms on → ensures the display is powered on by the compositor
+    # - wake-display.sh checks if dpms is off; only then does a dpms off/on
+    #   cycle to force Hyprland to recreate hyprlock surfaces
     # - ddcutil setvcp 10 100 → restores monitor brightness to full
     # 
-    # Both together guarantee the screen wakes reliably on all monitors
+    # Both together guarantee the screen wakes reliably
 }
 
 # Step 4: Suspend system after 30 min idle