Admin protetto, dashboard KPI e aggiornamenti sito marketing.

Login admin con cambio password, metriche server (CPU/RAM/disco/banda), grafici e statistiche streaming; sezione piani ridimensionata.

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

backend/app/controllers/admin/dashboard_controller.rb

@@ -1,8 +1,19 @@
 module Admin
   class DashboardController < Admin::BaseController
     def index
-      @teams = Team.includes(:matches).order(:name)
-      @active_sessions = StreamSession.where(status: %w[live reconnecting connecting]).includes(:match)
+      @stats = DashboardStats.new.call
+      @host = HostMetrics.new.sample!
+      @active_sessions = StreamSession
+        .where(status: DashboardStats::ACTIVE_STATUSES)
+        .includes(match: :team)
+        .order(started_at: :desc)
+      @teams = Team.includes(:matches).order(:name).limit(8)
+    end
+
+    def metrics
+      host = HostMetrics.new.sample!
+      stats = DashboardStats.new.call
+      render json: { host: host, stats: stats, at: Time.current.iso8601 }
     end
   end
 end