Rendi affidabile pausa con slate e conferma i controlli laterali.

Evita buchi HLS/YouTube in pausa (path slate ricreata, reload player, no patch recording inutili) e richiede conferma su tasti laterali app/regia.

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

backend/app/services/sessions/pause.rb

@@ -7,11 +7,13 @@ module Sessions
     def call
       cancel_timeout_job
       @session.pause! if @session.may_pause?
-      Mediamtx::PublisherSync.forget_recording_state!(@session.id)
       begin
         mtx = Mediamtx::Client.for_session(@session)
-        mtx.set_path_recording(@session, enabled: false)
-        mtx.set_always_available(@session, enabled: true)
+        # Ricrea/riallinea slate prima di spegnere l'RTMP del telefono.
+        mtx.ensure_path_with_slate!(@session)
+        # PATCH recording solo se era attivo (evita kill muxer HLS a ogni pausa).
+        mtx.disable_recording_if_active!(@session)
+        Mediamtx::PublisherSync.remember_recording_off!(@session.id)
       rescue Mediamtx::Client::Error => e
         Rails.logger.warn("[Sessions::Pause] MediaMTX: #{e.message}")
       end