Migliora sessioni admin e rende robusto il logout web.

Aggiunge filtri/colonne (società, orari) e dettaglio leggibile; evita 422 CSRF su logout e non cancella le cover slate custom in sync prod.

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

backend/app/models/stream_session.rb

@@ -10,6 +10,7 @@ class StreamSession < ApplicationRecord
   belongs_to :stream_node, optional: true
   has_many :stream_events, dependent: :destroy
   has_one :score_state, dependent: :destroy
+  has_one :recording
   has_many :device_states, dependent: :destroy
 
   validates :platform, inclusion: { in: PLATFORMS }