chore: misc tweaks — nm-applet autostart, thunar, SUPER+Q close, monitor preset

- autostart nm-applet --indicator under uwsm-app
- install networkmanagerapplet system-wide
- swap Nautilus for Thunar in file-manager bindings
- close-window bound to SUPER+Q (was SUPER+W)
- switch the active monitor preset from retina/2x to 1x 1080p/1440p
- summer-night waybar: drop custom/battery + backlight from modules-right

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

features/desktop/hyprland/config/monitors.conf

@@ -3,8 +3,8 @@
 # Format: monitor = [port], resolution, position, scale
 
 # Optimized for retina-class 2x displays, like 13" 2.8K, 27" 5K, 32" 6K.
-env = GDK_SCALE,2
-monitor=,preferred,auto,auto
+#env = GDK_SCALE,2
+#monitor=,preferred,auto,auto
 
 # Good compromise for 27" or 32" 4K monitors (but fractional!)
 # env = GDK_SCALE,1.75
@@ -12,8 +12,8 @@ monitor=,preferred,auto,auto
 
 # Straight 1x setup for low-resolution displays like 1080p or 1440p
 # Or for ultrawide monitors like 34" 3440x1440 or 49" 5120x1440
-# env = GDK_SCALE,1
-# monitor=,preferred,auto,1
+ env = GDK_SCALE,1
+ monitor=,preferred,auto,1
 
 # Portrait/rotated secondary monitor (transform: 1 = 90°, 3 = 270°)
 # monitor = DP-2, preferred, auto, 1, transform, 1