[ENHANCEMENT] Suppress actionable controls for already-resolved tool asks

[roomote]

Problem (one or two sentences)

The webview can keep showing actionable approval controls for a tool ask even after that ask has already been resolved. That makes auto-approved read-only asks feel visually unstable.

Context (who is affected and when)

This affects users with read-only auto-approve enabled and contributors reviewing the chat UI behavior. It is the smallest user-facing containment step for issue #102.

Desired behavior (conceptual, not technical)

Once a tool ask is already resolved, the user should not keep seeing active Approve / Reject controls for it.

Constraints / preferences (optional)

Keep this as a frontend-only containment pass. Do not turn it into a broad approval-pipeline rewrite.

Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Zoo Code Task Links (optional)

• https://app.roomote.dev/task/2t7u9db2gc882

Acceptance criteria (optional)

• Already-resolved tool asks do not keep actionable approval controls visible in the webview.
• ChatView coverage proves the containment behavior.
• The change remains small and reviewable as a 1 SP slice under [ENHANCEMENT] Reduce approval-control flash for auto-approved read-only asks #102.

Proposed approach (optional)

Use the extracted ask/footer-state seam from #103 to suppress actionable controls when a tool ask has already been answered/resolved, without changing the backend approval sequencing yet.

Trade-offs / risks (optional)

This is an interim containment step, not the root-cause fix. It should reduce UI inconsistency, but the backend sequencing work in #105 is still needed.