a3c92b68dc
v1 coverage-audit: the last unbuilt design-brief §5 debug pane. #11's blocker was already satisfied (admin key carries admin.events.read). Completes the admin/debug-observability core. - sse_client.py: AdminEvent dataclass + stream_admin_events — a new long-lived SSE consumer for the admin lifecycle stream (envelope {id,type,timestamp,data}), admin-scoped (bearer-override), Last-Event-ID resume. non-200 -> SseConnectFailed; mid-drop -> SseConnectionDropped. - tui.py: "AdminEvents" TabPane + _format_admin_event + _admin_event_matches (design-brief §6 filter: active-session + non-heartbeat system.*) + _stream_admin_events long-lived best-effort worker (unconditional on_mount; self-labels not-configured / unavailable / stream-ended). - Contract-skipped for stream_admin_events (out of #1's turn-SSE scope; spec § Admin Event Stream is the reference). TDD: 4 sse_client + 5 tui tests. Suite 561 green. - LIVE-AUTH-PROVEN on :8081 (GET /admin/events -> HTTP 200 under admin key). Coverage: REST 12/40. Tier 1 debug-observability core complete.