Wire CommandPalette/Provider into the frontend layout and add Cmd+K
hint in the SiteHeader. Register context-aware commands for banking,
helpdesk, mission RSVP, locker, shipments, and market pages.
Also removes the locker search's duplicate Cmd+K listener (now handled
globally), renames its button to 'Search Locker', and cleans up a
flappy page parenthetical.
Use the shadcn Alert component for the file-sharing hint instead of a bare Message element.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
