Collapse Elle execution details behind a worked-time summary

Summary

Give each completed Elle response a compact execution summary, with the detailed working trace hidden by default.

Proposed experience

1. Display a collapsed control such as Worked for 4m 12s › above Elle’s final response.

2. When selected, expand the control to reveal the messages, reasoning summaries, and tool calls from the execution loop.

3. Keep the final answer or action summary visible below the trace.

4. Below the answer, display a concise Records modified list showing every record Elle created or edited, the record ID and name, and a short description of the change.

Why

This preserves visibility into what Elle did without forcing users to scan the entire execution trace. It follows the familiar progressive-disclosure pattern used by coding assistants such as Codex and Claude: outcomes first, implementation detail available on demand.

Prototype

https://big.aha.io/assistant/shared_artifacts/SBsyy65pO9EHovrUFcNHCKDqmXPPd4e5TTLQhyDQP9qs/9