feat: port dinosaur ujust from aurora

Containerfile

@@ -443,6 +443,7 @@ RUN --mount=type=cache,dst=/var/cache \
             krdp \
             steamdeck-kde-presets-desktop \
             wallpaper-engine-kde-plugin \
+            plasma-wallpapers-dynamic \
             kdeconnectd \
             kdeplasma-addons \
             rom-properties-kf6 \

system_files/desktop/shared/usr/lib/systemd/user/bluefin-wallpaper@.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Update Bluefin Wallpaper of the Month
+After=graphical-session.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/ublue-bluefin-plasma-wallpaper %i
+RemainAfterExit=true
+
+[Install]
+WantedBy=default.target

system_files/desktop/shared/usr/libexec/ublue-bluefin-plasma-wallpaper

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -oux pipefail
+
+HEMI="${1:-north}"
+if [[ "$HEMI" != "north" && "$HEMI" != "south" ]]; then
+    echo "Error: Invalid hemisphere '$HEMI'. Must be 'north' or 'south'."
+    exit 1
+fi
+
+mkdir -p ~/.local/share/wallpapers/Bluefin
+cd ~/.local/share/wallpapers/Bluefin
+
+curl -Lo ${HEMI}.md5 https://github.com/grandpares/plasma-bluefin-wallpaper/releases/latest/download/${HEMI}.md5
+md5sum --status -c ${HEMI}.md5 || curl -Lo ${HEMI}.avif https://github.com/grandpares/plasma-bluefin-wallpaper/releases/latest/download/${HEMI}.avif

system_files/desktop/shared/usr/share/ublue-os/just/80-bazzite.just

@@ -429,6 +429,60 @@ configure-snapshots ACTION="":
       /usr/libexec/bazzite-snapper-config wipe
     fi
 
+# Automatically download Bluefin's monthly dinosaur wallpapers
+[group("system")]
+toggle-dinosaurs hemisphere="north":
+    #!/bin/bash
+    source /usr/lib/ujust/ujust.sh
+
+    if [[ "{{ hemisphere }}" != "north" && "{{ hemisphere }}" != "south" ]]; then
+        echo "Error: Invalid hemisphere '{{ hemisphere }}'. Must be 'north' or 'south'."
+        exit 1
+    fi
+
+    DINOSAUR_STATUS="$(systemctl --user is-enabled bluefin-wallpaper@{{ hemisphere }}.service 2>/dev/null || echo 'disabled')"
+
+    echo "Bluefin dinosaur wallpapers ({{ hemisphere }}ern hemisphere) are currently: $DINOSAUR_STATUS"
+
+    if [ "$DINOSAUR_STATUS" == "enabled" ]; then
+        echo "Disable Bluefin dinosaur wallpapers?"
+        OPTION=$(Choose Disable Cancel)
+        if [ "$OPTION" = "Disable" ]; then
+            systemctl --user disable --now bluefin-wallpaper@{{ hemisphere }}.service
+            echo "${b}${red}Bluefin dinosaur wallpapers ({{ hemisphere }}ern hemisphere) disabled.${n}"
+            echo "Wallpaper files remain in ~/.local/share/wallpapers/Bluefin/"
+        fi
+    else
+        echo "Enable Bluefin dinosaur wallpapers for the {{ hemisphere }}ern hemisphere?"
+        OPTION=$(Choose Enable Cancel)
+        if [ "$OPTION" = "Enable" ]; then
+            mkdir -p ~/.local/share/wallpapers/Bluefin
+            systemctl --user enable --now bluefin-wallpaper@{{ hemisphere }}.service
+
+            sleep 1
+            if systemctl --user is-active --quiet bluefin-wallpaper@{{ hemisphere }}.service; then
+                echo "${b}${green}Bluefin dinosaur wallpapers ({{ hemisphere }}ern hemisphere) enabled!${n}"
+                echo "Wallpapers will be downloaded to ~/.local/share/wallpapers/Bluefin/"
+                echo "The wallpaper will update automatically each month."
+                filename="$HOME/.local/share/wallpapers/Bluefin/{{ hemisphere }}.avif"
+
+                qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript "
+                    var allDesktops = desktops();
+                    for (var i = 0; i < allDesktops.length; i++) {
+                        var d = allDesktops[i];
+                        d.wallpaperPlugin = \"com.github.zzag.dynamic\";
+                        d.currentConfigGroup = Array(\"Wallpaper\", \"com.github.zzag.dynamic\", \"General\");
+                        d.writeConfig(\"Image\", \"file:///${filename}\");
+                    }
+                "
+            else
+                echo "${b}${red}Failed to start bluefin-wallpaper service.${n}"
+                echo "Check the service status with:"
+                echo "  systemctl --user status bluefin-wallpaper@{{ hemisphere }}.service"
+            fi
+        fi
+    fi
+
 # Enable a Bluefin-style CLI experience
 [group("development")]
 bazzite-cli: