Hypr: tidy env setup and laptop idle guard

.config/hypr/conf.d/50-autostart.conf##hostname.cn-arch

@@ -1,9 +1,9 @@
 # ~/.config/hypr/conf.d/50-autostart.conf
 
+exec-once = dbus-update-activation-environment --all
 exec-once = uwsm app -- swaync
 exec-once = uwsm app -- waybar
 exec-once = xsettingsd
-exec-once = hyprsunset
 exec-once = ~/.config/waybar/scripts/hyprsunset_daemon.sh
 
 exec-once = hyprpaper -c $HOME/.config/hyprpaper.conf

.config/hypr/conf.d/50-autostart.conf##hostname.viking-mate

@@ -14,5 +14,4 @@ exec-once = bash -lc 'command -v nm-applet >/dev/null && nm-applet &'
 exec-once = bash -lc 'command -v blueman-applet >/dev/null && blueman-applet &'
 
 
-exec-once = pkill mako; mako
 exec-once = pkill wl-paste; wl-paste -t text --watch clipman store

.config/hypr/hypridle.conf##hostname.viking-mate

@@ -1,11 +1,13 @@
 # Same as cn-arch: lock at 10 min, screen off at 15 min.
 
+# Brightness dimmer (requires brightnessctl)
 listener {
   timeout = 300
-  on-timeout = brightnessctl --save && brightnessctl set 25%
-  on-resume = brightnessctl --restore
+  on-timeout = bash -lc "command -v brightnessctl >/dev/null && brightnessctl --save && brightnessctl set 25%"
+  on-resume = bash -lc "command -v brightnessctl >/dev/null && brightnessctl --restore"
 }
 
+
 general {
   lock_cmd = hyprlock
   before_sleep_cmd = hyprlock