Move minigame links from the user dropdown into a NavMinigames sidebar group, inline the admin link in AppSidebar via a new canAccessAdminPanel helper, guard NavCore against empty groups, drop the feedback secondary link, and add an empty navMap slot with a restore comment so the World Map ships hidden while /map stays live.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
