* feat: add kanban feature promotion with upgrade banner
Add a Kanban sidebar item visible to all users that shows a locked
feature promotion page. Super admins see an upgrade button linking to
fazer.ai, while non-admins see a message to contact their administrator.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: allow custom_role users to access kanban promotion page
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
