Restore plain machine headers in environment picker

[ymichael]

Human comments

What was wrong

#3274 replaced plain machine names in the environment picker headers with MachineLabel, adding a tiny laptop icon beside every machine name, including servers and desktop machines.

What changed

Restore the previous status-dot-and-name header markup. Preserve name truncation and the conditional “this machine” badge. Update the existing picker test to assert that headers contain no laptop icon.

How you verified

• pnpm exec turbo run test --filter=@bb/app -- EnvironmentPicker.test.tsx — all 31 tests passed, including the “this machine” badge assertion.
• Captured and visually inspected the actual picker in Ladle with fixture machines, both with and without local-daemon detection. Headers have no laptop icons; the local fixture shows the badge. Screenshot animations were disabled for stable captures.
• git diff --check passed.

AGENT GENERATED