Rubymine Project View omits public directory markers

Rubymine’s Project view displays files without any visual indicator for those located in directories named 'public', leaving uncertainty about visibility boundaries.

The default File Watcher settings monitor all project directories without restriction, and the default Run configuration uses the project root as the working directory, which may unintentionally expose files to external processes.

What visual marker does Rubymine use to denote files in 'public' directories? Are there default restrictions in File Watcher that limit monitoring of such paths? Can the default Run configuration unintentionally expose all project files when executed outside the IDE?