wolf: seed Steam libraryfolders.vdf into Wolf session home dir

Steam reads libraryfolders.vdf from /home/retro/.local/share/Steam/steamapps/
which Wolf serves from /etc/wolf/<session-id>/Steam/. Seeding it only in
/mnt/games/steam/steamapps/ was ignored since Steam doesn't know to look there.

- Seed the VDF into any existing /etc/wolf/<id>/Steam session dirs at install time
- manage.sh fix-perms now propagates the VDF from game storage into every
  Wolf session dir so running fix-perms is the one-command remedy on existing
  installs

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs

services/wolf.sh

@@ -701,10 +701,12 @@ UDEV
              "$GAME_STORAGE_DIR/firefox" "$GAME_STORAGE_DIR/minecraft" \
              "$GAME_STORAGE_DIR/kodi" "$GAME_STORAGE_DIR/emulators"
 
-    # Pre-seed Steam library config so it uses /mnt/games/steam on first launch
-    # without requiring the user to navigate Settings → Storage inside Steam.
-    cat > "$GAME_STORAGE_DIR/steam/steamapps/libraryfolders.vdf" << 'VDFEOF'
-"libraryfolders"
+    # Pre-seed Steam library config. Wolf mounts each app's home from
+    # /etc/wolf/<id>/Steam — Steam reads libraryfolders.vdf from there.
+    # We stash a copy in game storage and manage.sh fix-perms propagates it
+    # into every Wolf session dir after Wolf has run once.
+    local _VDF_CONTENT
+    _VDF_CONTENT='"libraryfolders"
 {
 	"0"
 	{
@@ -713,8 +715,17 @@ UDEV
 		"mounted"	"1"
 		"contentid"	"1"
 	}
-}
-VDFEOF
+}'
+    mkdir -p "$GAME_STORAGE_DIR/steam/steamapps"
+    echo "$_VDF_CONTENT" > "$GAME_STORAGE_DIR/steam/steamapps/libraryfolders.vdf"
+    # Also seed into any Wolf session dirs that already exist
+    for _wdir in /etc/wolf/[0-9]*/Steam; do
+        [ -d "$_wdir" ] || continue
+        mkdir -p "$_wdir/.local/share/Steam/steamapps"
+        echo "$_VDF_CONTENT" > "$_wdir/.local/share/Steam/steamapps/libraryfolders.vdf"
+        chown -R 1000:1000 "$_wdir"
+    done
+
     # Pre-create ES-DE ROM directories so the user knows where to drop files
     # and ES-DE shows the system in its list immediately on first launch.
     local _ESDE_SYSTEMS=(
@@ -1204,6 +1215,18 @@ PYEOF
             echo "  fixed: $GAME_DIR"
             found=1
         fi
+        # Propagate the Steam library seed into every Wolf session home so Steam
+        # uses /mnt/games/steam rather than defaulting to /home/retro.
+        if [ -n "$GAME_DIR" ] && [ -f "$GAME_DIR/steam/steamapps/libraryfolders.vdf" ]; then
+            for _wdir in /etc/wolf/[0-9]*/Steam; do
+                [ -d "$_wdir" ] || continue
+                sudo mkdir -p "$_wdir/.local/share/Steam/steamapps"
+                sudo cp "$GAME_DIR/steam/steamapps/libraryfolders.vdf" \
+                        "$_wdir/.local/share/Steam/steamapps/libraryfolders.vdf"
+                sudo chown -R 1000:1000 "$_wdir"
+                echo "  seeded libraryfolders.vdf → $_wdir"
+            done
+        fi
         [ "$found" = 0 ] && echo "  Nothing to fix (no Wolf app dirs found yet)."
         echo "Done. Reconnect from Moonlight to relaunch the app."
         ;;