merge prod to main

app/Models/SubjectCurriculumModel.php

@@ -27,6 +27,7 @@ class SubjectCurriculumModel extends Model
         return $this->where('class_id', $classId)
             ->where('subject', $subject)
             ->orderBy('unit_number', 'ASC')
+            ->orderBy("CAST(SUBSTRING_INDEX(chapter_name, '.', 1) AS UNSIGNED)", 'ASC', false)
             ->orderBy('chapter_name', 'ASC')
             ->findAll();
     }