Polish mock policy server UI - #334122

PR classified as team-member.

✅ Head commit 9aca411 is signed by joshspicer with trusted key SHA256:AXXH2Jq+kmzX0LKCfEqsOtrDNgPQFtSsg1Dw+L1xikc — approval requirement reduced from 2 to 1.

✅ Collaborator approvals: 1/1 (dmitrivMS).

✅ No newly added runnable binary files.

✅ No protected engineering system files changed.