Implementa pausa diretta con copertina slate e ripresa.

Metti in pausa ferma RTMP lato app mantenendo la camera aperta, MediaMTX
manda offline.mp4 agli spettatori e Chiudi termina definitivamente.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/webhooks/mediamtx_handler.rb

@@ -23,6 +23,8 @@ module Webhooks
     private
 
     def handle_connect(session)
+      return if session.paused?
+
       return if session.live? && session.stream_events.where(event_type: "connected").exists?
 
       if session.reconnecting?
@@ -38,6 +40,7 @@ module Webhooks
     end
 
     def handle_disconnect(session)
+      return if session.paused?
       return unless session.live? || session.connecting?
 
       if session.connecting?