Include head_trainer groups in trainer attendance view

Trainers now see sessions for groups where they are head_trainer_id
in addition to explicit assignments, ensuring no sessions are missed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Livewire/Attendance/QuickAttendance.php

@@ -125,14 +125,20 @@ public function render()
         $user = auth()->user();
         $today = now()->toDateString();
 
-        // Get group IDs assigned to this trainer
+        // Get group IDs assigned to this trainer (via assignments OR head_trainer_id)
         $assignedGroupIds = Assignment::active()
             ->forUser($user->id)
             ->where('assignable_type', TrainingGroup::class)
             ->pluck('assignable_id');
 
+        $headTrainerGroupIds = TrainingGroup::where('head_trainer_id', $user->id)
+            ->whereIn('status', ['active', 'forming'])
+            ->pluck('id');
+
+        $allGroupIds = $assignedGroupIds->merge($headTrainerGroupIds)->unique();
+
         // Today's sessions for assigned groups
-        $todaySessions = TrainingSession::whereIn('training_group_id', $assignedGroupIds)
+        $todaySessions = TrainingSession::whereIn('training_group_id', $allGroupIds)
             ->where('session_date', $today)
             ->whereIn('status', [SessionStatus::Scheduled, SessionStatus::InProgress, SessionStatus::Completed])
             ->with('group')