feat(cli): default to current directory when no -d or -f specified

When neither --directory nor --files is provided, the CLI now defaults
to os.getcwd() so running `momoa "prompt"` operates on the current
working directory instead of doing nothing.

💘 Generated with Crush

Assisted-by: GLM 5.1 via Crush <crush@charm.land>

Author: anschmieg

client-cli/python_cli.py

@@ -561,6 +561,10 @@ def main():
 
     args = parser.parse_args()
 
+    # If no directory or files specified, default to current directory
+    if args.directory is None and not args.files:
+        args.directory = os.getcwd()
+    
     # --------------------------------------------------------------------------
     # MODIFIED: Check if --spec and --env arguments are file paths.
     # If they are, read the content from the file.