- Add `hiddenRosterAgents: ReadonlySet<string>` to LozengeFlyContext:
- Derived from pipeline: any agent currently assigned to a work item
- `flyingOutAgents` state keeps badge hidden for 500 ms during the
fly-out animation so the returning clone lands before the badge reappears
- Union of both sets exposed as `hiddenRosterAgents` in context
- Update AgentPanel: wrap each RosterBadge in a collapsing div
controlled by `hiddenRosterAgents`. The div transitions max-width
0→300px / opacity 0→1 so the roster gap closes/opens smoothly.
- Add tests covering:
- `hiddenRosterAgents` is empty when no agents are assigned
- Badge hidden immediately when agent appears in pipeline
- Badge hidden during fly-out (0–499 ms) and visible after (≥500 ms)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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