- Remove Stop buttons from active/paused/running/error in both grid and list
views; Pause/Resume/Retry cover the reversible transitions and Delete stays
available on idle/terminated for teardown. Matches the existing shape of
AgentDetailView after the earlier cleanup.
- Drop the redundant interval badge next to the heartbeat dropdown — the
selected <option> already shows the current value.
- Add a "Next: HH:MM:SS" indicator alongside "Last:" for active/running
agents, derived from lastHeartbeatAt + configuredIntervalMs (full timestamp
in the tooltip). Paused/idle/error/terminated agents show Last only since
there's no scheduled next tick.
- Remove now-unused Square and Heart icon imports.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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