Fix sports dashboard: training_groups uses is_active not status

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Modules/Disciplines/Controllers/SportsDashboardController.php

@@ -139,7 +139,7 @@ class SportsDashboardController extends Controller
                 SUM(CASE WHEN is_full = 1 THEN 1 ELSE 0 END) AS full_groups,
                 COALESCE(SUM(current_count), 0) AS total_players
             FROM training_groups
-            WHERE status = 'active'
+            WHERE is_active = 1
         ") ?: ['total' => 0, 'full_groups' => 0, 'total_players' => 0];
 
         // Pool utilization today