Fix Wolf Desktop app's image reference: xfce, not desktop

ghcr.io/games-on-whales/desktop never existed. Confirmed live: Wolf logged
"[DOCKER] error 404 - No such image: ghcr.io/games-on-whales/desktop:edge"
and silently returned to the Moonlight app list with no other visible
error, making the Desktop tile look like it just didn't launch. The
games-on-whales/gow repo's apps/ directory names this app "xfce", and
ghcr.io/games-on-whales/xfce:edge is the real, currently published image
(confirmed against GHCR's own tag list for that package) — the icon path
uses the same "xfce" naming.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VLX1yYKJExGSXmgUhxKQG6

services/wolf.sh

@@ -1719,8 +1719,16 @@ CATALOG = {
     ),
     'desktop': dict(
         name='WolfDesktop', title='Desktop',
-        icon='https://games-on-whales.github.io/wildlife/apps/desktop/assets/icon.png',
-        image='ghcr.io/games-on-whales/desktop:edge',
+        # NOT "desktop" — ghcr.io/games-on-whales/desktop never existed.
+        # Confirmed live: Wolf logged "[DOCKER] error 404 - No such image:
+        # ghcr.io/games-on-whales/desktop:edge" and silently dropped back to
+        # the Moonlight app list with no other indication of failure. The
+        # games-on-whales/gow repo's apps/ directory names this app "xfce",
+        # and ghcr.io/games-on-whales/xfce:edge is the real, currently
+        # published image (confirmed against the GHCR package's own tag
+        # list). The icon path uses the same "xfce" naming.
+        icon='https://games-on-whales.github.io/wildlife/apps/xfce/assets/icon.png',
+        image='ghcr.io/games-on-whales/xfce:edge',
         # Shares the SAME persistent home (.config/.local/share) and
         # emulators/ -> ~/Applications mount as esde/retroarch below — a real
         # XFCE multi-window session is a much more reliable place to run a
@@ -3134,8 +3142,16 @@ CATALOG = {
     ),
     'desktop': dict(
         name='WolfDesktop', title='Desktop',
-        icon='https://games-on-whales.github.io/wildlife/apps/desktop/assets/icon.png',
-        image='ghcr.io/games-on-whales/desktop:edge',
+        # NOT "desktop" — ghcr.io/games-on-whales/desktop never existed.
+        # Confirmed live: Wolf logged "[DOCKER] error 404 - No such image:
+        # ghcr.io/games-on-whales/desktop:edge" and silently dropped back to
+        # the Moonlight app list with no other indication of failure. The
+        # games-on-whales/gow repo's apps/ directory names this app "xfce",
+        # and ghcr.io/games-on-whales/xfce:edge is the real, currently
+        # published image (confirmed against the GHCR package's own tag
+        # list). The icon path uses the same "xfce" naming.
+        icon='https://games-on-whales.github.io/wildlife/apps/xfce/assets/icon.png',
+        image='ghcr.io/games-on-whales/xfce:edge',
         # Shares the SAME persistent home (.config/.local/share) and
         # emulators/ -> ~/Applications mount as esde/retroarch below — a real
         # XFCE multi-window session is a much more reliable place to run a