Add control room help article and move ops docs

docs/help/en/admin/live-show-setup.md

@@ -11,6 +11,7 @@ translation_state: aligned
 last_reviewed_at: 2026-01-23
 owner: ops@fotospiel.app
 related:
+  - slug: control-room-moderation
   - slug: event-prep-checklist
 ---
 
@@ -32,7 +33,7 @@ related:
 - The player is read-only and works without login.
 
 ## During the event
-- Approve photos in the moderation view if review is enabled.
+- Approve photos in the Control Room if review is enabled.
 - If the show stutters, reduce effects or switch to single layout.
 
 ## Recommended hardware