add quick actions tab

modules/home/wayland/apps/eww/bar/scripts/brightness

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+BACKLIGHT="/sys/class/backlight"
+DEV=$(ls "$BACKLIGHT" 2>/dev/null | head -n1)
+
+gen_output() {
+  if [ -z "$DEV" ]; then
+    echo '{"percent":0,"available":false}'
+    return
+  fi
+  max=$(cat "$BACKLIGHT/$DEV/max_brightness")
+  cur=$(cat "$BACKLIGHT/$DEV/actual_brightness" 2>/dev/null || cat "$BACKLIGHT/$DEV/brightness")
+  percent=$(awk -v c="$cur" -v m="$max" 'BEGIN{print int(c/m*100+0.5)}')
+  printf '{"percent":%d,"available":true}\n' "$percent"
+}
+
+case "$1" in
+  set)
+    [ -z "$DEV" ] && exit 0
+    brightnessctl -d "$DEV" set "${2}%" -q 2>/dev/null
+    ;;
+  *)
+    gen_output
+    [ -z "$DEV" ] && exit 0
+    # Poll for changes every 2s (sysfs files don't support inotify reliably)
+    while true; do sleep 2; gen_output; done
+    ;;
+esac