Fail gracefully on machines without osascript support

gnommo/cli.py

@@ -950,6 +950,14 @@ def _import_presenter_notes(
     Also exports slides as PNG images to media/slides/{project_name}/.
     Backs up existing manuscript.txt before overwriting.
     """
+    # osascript is macOS-only; skip gracefully on WSL/Linux/Windows
+    if shutil.which("osascript") is None:
+        print(
+            f"  Warning: osascript not available (not macOS) — skipping Keynote import for {keynote_file.name}.",
+            file=sys.stderr,
+        )
+        return
+
     print(f"  Extracting presenter notes from {keynote_file.name}...")
 
     # Find the JXA script (in the same directory as this module)