When viewing repo-level Actions secrets or variables, also display
inherited org-level entries as read-only with an "overridden by
repository" badge when a repo entry shadows an org entry. Includes
a link to org settings for management.
Closes#78
Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>