Replaces the /settings/live-events placeholder with a working page that
streams server-wide events from /api/v1/attach. Shares the leader-owned
cross-tab EventSource so additional tabs subscribe without opening
parallel connections.
The page keeps an in-memory ring buffer (newest first, max 1,000) with
id or run_id:seq dedupe and resets on remount; live-only by design,
nothing is replayed on connect or persisted in the browser. Reuses the
existing event-debug filters, search, and details panel, and links each
row's run_id to /runs/:id. The category filter is the static set of
DebugCategory values so "All types" always matches.
Settings layout is now fullHeight-aware so the events page can fill the
viewport alongside the sub-nav. DebugEventDetailsPanel's event prop is
broadened to a shared EventDisplayPayload shape so it accepts both
EventEnvelope and the live payload.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
