PromptManagerConfig.save_to_file and the settings endpoint write
config.json through write_private_json: created with mode 0600 (chmod on
POSIX, best effort on Windows) because the file can hold an API key.
_persist_settings merges web_ui and gallery.monitoring.directories into
the existing file instead of overwriting it, so the integrations section
and any other key survive a settings save.
The test-link diagnostic no longer stores a client-supplied path; it
records a marker file name under the output directory.
Vito Sansevero
675168deff