- Remove SSE log stream (EventSource /api/logs/stream) and logView panel
- System events panel now occupies the full bottom-middle panel
- Each event renders as a single flex row: level badge, type, message, timestamp
- Remove logSource from state, logView from dom, startLogs from app bootstrap
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>