The compact board view was a duplicate of the list view with fewer affordances
— no heartbeat dropdown, no Last/Next indicators, and its own copy of the
action buttons that kept drifting out of sync with the list view's. Drop it
entirely and migrate any saved "board" preference to "list" on load.
- Remove Board toggle button (LayoutGrid icon) and the "board" state value.
- Remove the entire board rendering branch.
- Simplify getStateCardClass to the single "agent-card" prefix.
- Remove unused LayoutGrid import.
Tree and Org Chart views remain unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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