fix a few things

debian/changelog

@@ -8,5 +8,13 @@ desktop-base (26.1) vesperos; urgency=medium
   * Fixed Plymouth script oem_brand referencing a missing image.
   * Added logo-text.png build target from vesperos-logos SVG for Plymouth.
   * Removed all upstream Debian legacy migration code.
+  * Fix GNOME Settings "About" page not showing the OS logo: restore the
+    update-alternatives block for vendor-logos in postinst, which was lost
+    when the postinst was simplified. This populates the
+    /usr/share/icons/vendor/ paths that gnome-control-center requires.
+    Also add corresponding --remove calls in postrm.
+  * Fix wallpaper showing as solid blue in prefer-dark mode: add
+    picture-uri-dark to the gsettings-override so GNOME does not fall back
+    to the compiled-in solid colour when color-scheme=prefer-dark is set.
 
  -- VesperOS Desktop Team <contact@oxmc.me>  Thu, 03 Apr 2026 00:00:00 +0000

debian/gsettings-override

@@ -1,7 +1,9 @@
 [org.gnome.desktop.background]
 picture-options='zoom'
 picture-uri='file:///usr/share/images/desktop-base/desktop-background.xml'
+picture-uri-dark='file:///usr/share/images/desktop-base/desktop-background.xml'
 
 [org.gnome.desktop.screensaver]
 picture-options='zoom'
 picture-uri='file:///usr/share/images/desktop-base/desktop-lockscreen.xml'
+picture-uri-dark='file:///usr/share/images/desktop-base/desktop-lockscreen.xml'

debian/postinst

@@ -7,6 +7,25 @@ if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-remov
 
     mkdir -p /usr/share/images/desktop-base
 
+    # Register vendor logo alternatives so GNOME Settings and other tools
+    # can find the OS logo at the standard /usr/share/icons/vendor/ path.
+    update-alternatives --install \
+        /usr/share/images/vendor-logos \
+        vendor-logos \
+        /usr/share/desktop-base/os-logos 50 \
+        --slave /usr/share/icons/vendor/scalable/emblems/emblem-vendor.svg \
+            emblem-vendor-scalable \
+            /usr/share/icons/desktop-base/scalable/emblems/emblem-vesperos.svg \
+        --slave /usr/share/icons/vendor/64x64/emblems/emblem-vendor.png \
+            emblem-vendor-64 \
+            /usr/share/icons/desktop-base/64x64/emblems/emblem-vesperos.png \
+        --slave /usr/share/icons/vendor/128x128/emblems/emblem-vendor.png \
+            emblem-vendor-128 \
+            /usr/share/icons/desktop-base/128x128/emblems/emblem-vesperos.png \
+        --slave /usr/share/icons/vendor/256x256/emblems/emblem-vendor.png \
+            emblem-vendor-256 \
+            /usr/share/icons/desktop-base/256x256/emblems/emblem-vesperos.png
+
     # Register vesperos as a desktop theme option.
     # active-theme is the master; all per-theme files are slaves so that
     # a single `update-alternatives --config desktop-theme` switches everything.

debian/postrm

@@ -3,6 +3,11 @@ set -e
 
 #DEBHELPER#
 
+if [ "$1" = "remove" ] || [ "$1" = "purge" ]; then
+    update-alternatives --remove vendor-logos /usr/share/desktop-base/os-logos || true
+    update-alternatives --remove desktop-theme /usr/share/desktop-base/vesperos-theme || true
+fi
+
 if [ "$1" = "remove" ] || [ "$1" = "deconfigure" ]; then
     # Reset Plymouth theme only if vesperos is still active
     if command -v plymouth-set-default-theme > /dev/null 2>&1; then

vesperos-theme/gnome-wp-list.xml

@@ -2,9 +2,10 @@
 <!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
 <wallpapers>
   <wallpaper>
-    <!-- don't include words such as "wallpaper" (avoids translations) -->
     <name>VesperOS</name>
+    <!-- The same wallpaper is used for both light and dark variants. -->
     <filename>/usr/share/desktop-base/vesperos-theme/wallpaper/gnome-background.xml</filename>
+    <filename-dark>/usr/share/desktop-base/vesperos-theme/wallpaper/gnome-background.xml</filename-dark>
     <options>zoom</options>
     <pcolor>#ffffff</pcolor>
     <scolor>#000000</scolor>