better installer and portable mode

tools/createshortcut.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# PLWL portable shortcut creator — bundled inside the release tarball.
+# Installs the icon into the user icon theme and creates a .desktop entry
+# pointing at ./olcxja.plwl/olcxja.plwl in the folder this script lives in
+# (portable mode — no files are copied anywhere).
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+APP_DIR="$HOME/.local/share/applications"
+ICON_BASE="$HOME/.local/share/icons/hicolor"
+ICON_SRC="$SCRIPT_DIR/olcxja.plwl.png"
+EXE="$SCRIPT_DIR/olcxja.plwl/olcxja.plwl"
+
+[ -f "$EXE" ] || { echo "createshortcut.sh: olcxja.plwl runtime not found in $SCRIPT_DIR" >&2; exit 1; }
+chmod +x "$EXE" 2>/dev/null || true
+
+echo "1. Installing icon..."
+if [ -f "$ICON_SRC" ]; then
+  for dir in 16x16 32x32 48x48 256x256; do
+    mkdir -p "$ICON_BASE/$dir/apps"
+    cp "$ICON_SRC" "$ICON_BASE/$dir/apps/olcxja.plwl.png"
+  done
+fi
+
+echo "2. Creating shortcut..."
+mkdir -p "$APP_DIR"
+cat > "$APP_DIR/olcxja.plwl.desktop" << EOF
+[Desktop Entry]
+Type=Application
+Name=PLWL
+Comment=Portable Linux Wine Launcher
+Exec="$EXE"
+Icon=olcxja.plwl
+Terminal=false
+Categories=Game;
+EOF
+chmod +x "$APP_DIR/olcxja.plwl.desktop"
+command -v update-desktop-database >/dev/null 2>&1 && update-desktop-database "$APP_DIR" 2>/dev/null || true
+
+echo "Shortcut created: $APP_DIR/olcxja.plwl.desktop -> $EXE"