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/services/admin/dashboard_stats.rb

@@ -0,0 +1,27 @@
+module Admin
+  class DashboardStats
+    ACTIVE_STATUSES = %w[live reconnecting connecting paused].freeze
+
+    def call
+      now = Time.current
+      day_start = now.beginning_of_day
+      month_start = now.beginning_of_month
+
+      ended_today = StreamSession.where(status: "ended").where("ended_at >= ?", day_start)
+      ended_month = StreamSession.where(status: "ended").where("ended_at >= ?", month_start)
+
+      {
+        active_sessions: StreamSession.where(status: ACTIVE_STATUSES).count,
+        sessions_today: ended_today.count,
+        sessions_month: ended_month.count,
+        stream_minutes_today: (ended_today.sum(:total_duration_secs).to_i / 60.0).round,
+        stream_minutes_month: (ended_month.sum(:total_duration_secs).to_i / 60.0).round,
+        teams_count: Team.count,
+        users_count: User.count,
+        matches_count: Match.count,
+        recordings_count: Recording.count,
+        recordings_ready: Recording.where(status: "ready").count
+      }
+    end
+  end
+end