feat(assets): NexusOS asset + theme rebrand

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/themes/restore-snapshot/gtk-3.0-settings.ini

@@ -3,12 +3,12 @@ gtk-application-prefer-dark-theme=true
 gtk-button-images=true
 gtk-cursor-theme-name=DMZ-White
 gtk-cursor-theme-size=24
-gtk-decoration-layout=icon:minimize,maximize,close
+gtk-decoration-layout=close,minimize,maximize:
 gtk-enable-animations=true
 gtk-font-name=Ubuntu 10
 gtk-icon-theme-name=NexusOS
-gtk-menu-images=false
-# gtk-modules=colorreload-gtk-module:window-decorations-gtk-module
+gtk-menu-images=true
+gtk-modules=colorreload-gtk-module
 gtk-primary-button-warps-slider=false
 gtk-theme-name=NexusOS
 gtk-toolbar-style=3

assets/themes/restore-snapshot/gtk-4.0-settings.ini

@@ -1,12 +1,12 @@
 [Settings]
 gtk-application-prefer-dark-theme=true
-gtk-theme-name=NexusOS
 gtk-cursor-theme-name=DMZ-White
 gtk-cursor-theme-size=24
-gtk-decoration-layout=icon:minimize,maximize,close
+gtk-decoration-layout=close,minimize,maximize:
 gtk-enable-animations=true
 gtk-font-name=Ubuntu 10
 gtk-icon-theme-name=NexusOS
-gtk-modules=colorreload-gtk-module:window-decorations-gtk-module
+gtk-modules=colorreload-gtk-module
 gtk-primary-button-warps-slider=false
+gtk-theme-name=NexusOS
 gtk-xft-dpi=98304

assets/themes/restore-snapshot/xfconf.txt

@@ -1,4 +1,4 @@
-# NexusOS live desktop wiring — snapshot 2026-05-18T13:42:57-05:00
+# NexusOS live desktop wiring — snapshot 2026-06-26T18:32:17-05:00
 # Reference only. Restore is done by assets/themes/install-theme.sh
 xsettings /Net/ThemeName = NexusOS
 xsettings /Net/IconThemeName = NexusOS