[FEATURE] Claude agents to show time since finished / stopped instead of when state transitioned

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

currently, claude agents state is recorded. but the session isn't updated back to working if you make another request after it's been labelled completed. So it will often finish, then get lost. when working with 5 or more claudes. its hard to keep track of what you need to test

Proposed Solution

have a live view in seconds since claude finished instead of when the state transition was made.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

Having 5+ claude sessions going, all different states. hard to see when claude finished. instead, greeted with time since initial work was finished / completed. Claude session that's just done a piece of work gets lost in huge list. i know this is a secondary issues to list / agents management. but deleting them removes niche context sometimes

Additional Context

_No response_