- Move AgentsView to consume agents, loading state, and reload logic directly from useAgents
- Extend useAgents with filterState/showSystemAgents options and always pass includeEphemeral in fetch filters
- Remove duplicate initial fetch/SSE path in AgentsView and rely on hook-managed refresh behavior
- Add regression coverage for single initial load and system-agent visibility toggling behavior
- Update useAgents hook tests to assert the new includeEphemeral fetch contract
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