fix(cli): preserve notes during sync moves

- Leave sync and watch notes empty by default instead of writing placeholder text.
- Preserve existing remote notes when moving or adopting files without --note.
- Detect tracked local moves by SHA-256 and update remote metadata safely.
- Skip files that vanish during watch scans instead of aborting the sync cycle.
- Bump NanoShare to 1.24.0 and the standalone CLI to 0.3.0.

cli/nanoshare_client/client.py

@@ -25,13 +25,14 @@ def upload(client, node: str, path: Path, remote_name: str, note: str, expires:
   result = client.call(node, 'files.upload', params)
   return result if isinstance(result, dict) else {'result': result}
 
-def update_remote(client, node: str, file_id: str, file_name: str, file_path: str, note: str, expires: str) -> None:
+def update_remote(client, node: str, file_id: str, file_name: str, file_path: str, note: str | None, expires: str) -> None:
   params = {
     'file_id': file_id,
     'file_name': file_name,
     'file_path': file_path,
-    'note': note,
   }
+  if note is not None:
+    params['note'] = note
   if expires:
     params['expires'] = expires
   client.call(node, 'files.update', params)