Sandbox set-up messages now always suggest claude sandbox install

What

The sandbox is a restricted environment Claude Code can run commands in, controlled with /sandbox. When it needs setting up again, Claude Code's messages no longer send you to your administrator:

• The guidance about commands excluded from the sandbox, and the hint shown when sandbox set-up fails, used to say your administrator could run the set-up again. They now suggest running claude sandbox install in a terminal, or /sandbox install inside Claude Code. Either way there is one elevation prompt, meaning one request for administrator permission.
• Whether sandbox settings are locked by policy no longer changes which command is suggested.
• After the Windows sandbox is removed, the message now always says to run claude sandbox install, or /sandbox install inside Claude Code. The separate message saying set-up was up to your administrator because settings are managed by policy is gone.

Why

On machines where an administrator manages the sandbox, you are now told to set it up yourself rather than to contact them.