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/config/routes.rb

@@ -184,7 +184,7 @@ Rails.application.routes.draw do
     post "signup", to: "registrations#create"
     get "login", to: "sessions#new"
     post "login", to: "sessions#create"
-    delete "logout", to: "sessions#destroy"
+    match "logout", to: "sessions#destroy", via: %i[delete get]
     patch "locale", to: "locales#update", as: :locale
     get "password/forgot", to: "password_resets#new", as: :password_forgot
     post "password/forgot", to: "password_resets#create"