refactor: replace orderBy with orderByDesc for consistent descending sort order across sessions, assignments, and attendance dates

app/Filament/Resources/Learning/ClassSessions/Pages/ListCourseSessions.php

@@ -58,7 +58,7 @@ public function sessions(): Collection
 
         return $this->course->classSessions()
             ->withCount(['attendances', 'materials', 'assignments'])
-            ->orderBy('session_number', 'asc')
+            ->orderByDesc('session_number')
             ->get()
             ->map(fn ($session) => (object) [
                 'id' => $session->id,

app/Http/Controllers/ShareAssignmentController.php

@@ -19,7 +19,7 @@ public function show(Request $request, Course $course): View
 
         $availableAssignments = Assignment::where('course_id', $course->id)
             ->with('classSession')
-            ->orderBy('created_at', 'desc')
+            ->orderByDesc('created_at')
             ->get();
 
         $assignmentId = $request->query('assignment_id');

app/Http/Controllers/ShareAttendanceController.php

@@ -38,7 +38,7 @@ public function show(Request $request, Course $course): View
         })
             ->select('date')
             ->distinct()
-            ->orderBy('date', 'desc')
+            ->orderByDesc('date')
             ->get()
             ->pluck('date');