- 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>
Add showToast() utility in api.js and a matching toast stylesheet.
apiFetch now automatically shows a toast for any 400+ response before
re-throwing, so callers can still .catch() for additional handling.
Toasts stack at the bottom-right, auto-dismiss after 4s, and support
error/warning/success/info levels via a left-border colour accent.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
caoqianming