docs(agents): finalize UI settings closeout

[blakinio]

Lifecycle-only closeout after verified UI/settings promotion #562.

This PR changes exactly one already-archived task record. It replaces pre-merge placeholders with terminal facts:

• source PR docs(track-a): research official-client UI settings model #544 = CLOSED UNMERGED AS SUPERSEDED;
• source audit review 4969134238 = ACCEPT_WITH_EDITS;
• clean promotion PR docs(track-a): promote verified UI settings evidence #562 head bff3df609175aa14a55967b6aea6817ecdc32848;
• promotion base 34e41a04d62e642ef0ae67c79354f183473270a3;
• promotion compare ahead_by=1, behind_by=0;
• promotion CI 32232600817 = SUCCESS;
• promotion static model 32232600573 = SUCCESS;
• promotion review 4970081454;
• promotion merge f3df2ee606058ba5ef7bec72b91f77f60eaffb59;
• ownership released;
• runtime authority closed (runtime_access:none, mutation_authorized:false).

No research conclusion, product/runtime behavior, PR #536 coverage path, credential state or gameplay state is changed.