Refactor custom startup script to set up shared Forge image cache and handle symlink creation

custom_startup.sh

@@ -9,5 +9,20 @@ if [[ -x $STARTUPDIR/maximize_window.sh ]]; then
   bash $STARTUPDIR/maximize_window.sh &
 fi
 
-# Run Forge and wait for it to close
+# Set up shared card image cache
+SHARED_CACHE="/forge-shared-cache"
+FORGE_CACHE="$HOME/.cache/forge/pics"
+
+mkdir -p "$(dirname "$FORGE_CACHE")"
+
+# Replace cache with symlink if needed
+if [ ! -L "$FORGE_CACHE" ]; then
+  rm -rf "$FORGE_CACHE"
+  ln -s "$SHARED_CACHE" "$FORGE_CACHE"
+  echo "✔ Forge image cache linked to $SHARED_CACHE"
+else
+  echo "ℹ Forge image cache already linked"
+fi
+
+# Launch Forge
 exec /opt/forge/forge.sh