fix: search list courses

apps/course/views/course.py

@@ -32,11 +32,16 @@ class CourseListAPIView(ListAPIView):
     queryset = Course.objects.all().exclude(status=Course.StatusChoices.INACTIVE)
     serializer_class = CourseListSerializer
     filter_backends = [SearchFilter] 
-    search_fields = ['title']
+    search_fields = ['title', 'category__name', 'professor__fullname']
 
     @swagger_auto_schema(
     operation_description=doc_course_list(),
     manual_parameters=[
+        openapi.Parameter(
+            'search', openapi.IN_QUERY,
+            description="Search by course title, category name, or professor's full name",
+            type=openapi.TYPE_STRING,
+        ),
         openapi.Parameter(
             'category_slug', openapi.IN_QUERY,
             description="Category of the Course",