New help-center module adds a question-mark icon to the sidebar with
an aside panel containing three sections: Documentation (permission-
gated links to docs viewer and API docs), Keyboard Shortcuts (inline
reference from HotkeyService with Mac/Win variants), and About
(application info). Visible to all logged-in users — individual
resource links respect existing permissions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>