AI Implementation feature(892): Admin Area General Settings and Categories 1.10 (#32)

docs/api/system.md

@@ -1,9 +1,9 @@
 ---
 type: api
 title: System Endpoints
-description: Bootstrap payload, public event status, public/authenticated SSE streams, and public event-window timestamps.
-tags: [api, system, bootstrap, event, sse, settings]
-timestamp: 2026-07-22T13:40:00Z
+description: Bootstrap payload, public event status, public/authenticated SSE streams, and public event-window timestamps; the public `event/stream` also forwards `general` topic frames carrying `registrationsEnabled`.
+tags: [api, system, bootstrap, event, sse, settings, registrations]
+timestamp: 2026-07-22T16:15:00Z
 ---
 
 # Endpoints
@@ -130,6 +130,14 @@ Public, flattened event stream that emits the legacy payload shape
 1-second tick and on hub pushes. Preserved for backward compatibility
 with the original landing page status badge.
 
+`admin/general` updates are also broadcast on this stream as
+`{ topic: 'general', themeKey, registrationsEnabled }` so the public
+landing page can refresh its cached bootstrap whenever an admin toggles
+the registrations flag (or any other general setting) without forcing
+the user to hard-refresh. The frame is interleaved with the legacy
+event-status frames. The legacy event-status frames are still emitted
+on the 1-second tick so existing consumers are unaffected.
+
 # `GET /api/v1/scoreboard/stream`
 
 Public SSE stream that pushes a flattened solve payload whenever a new