fix: add serializer removed during rebase

- Add CourseHomeTabSerializer to v1/serializers/home.py (was imported by
  v3/views/home.py but never defined, causing ImportError on startup)
- Export it from v1/serializers/__init__.py
- Remove stale HomePageCoursesView from v1/views/__init__.py (class was
  dropped by revert commit during rebase but export remained)
- Remove unused UserFactory and CourseOverviewFactory imports from
  v1/views/tests/test_home.py (ruff F401 violations from rebase conflict)

Author: Faraz32123

cms/djangoapps/contentstore/rest_api/v1/serializers/__init__.py

@@ -9,7 +9,7 @@
 from .course_waffle_flags import CourseWaffleFlagsSerializer  # noqa: F401
 from .grading import CourseGradingModelSerializer, CourseGradingSerializer  # noqa: F401
 from .group_configurations import CourseGroupConfigurationsSerializer  # noqa: F401
-from .home import LibraryTabSerializer, StudioHomeSerializer  # noqa: F401
+from .home import CourseHomeTabSerializer, LibraryTabSerializer, StudioHomeSerializer  # noqa: F401
 from .proctoring import (
     LimitedProctoredExamSettingsSerializer,  # noqa: F401
     ProctoredExamConfigurationSerializer,  # noqa: F401

cms/djangoapps/contentstore/rest_api/v1/serializers/home.py

@@ -39,6 +39,13 @@ class LibraryTabSerializer(serializers.Serializer):
     libraries = LibraryViewSerializer(many=True, required=False, allow_null=True)
 
 
+class CourseHomeTabSerializer(serializers.Serializer):
+    """Serializer for the courses tab of the Studio home page."""
+    courses = CourseCommonSerializer(required=False, many=True)
+    archived_courses = CourseCommonSerializer(required=False, many=True)
+    in_process_course_actions = UnsucceededCourseSerializer(many=True, required=False, allow_null=True)
+
+
 class StudioHomeSerializer(serializers.Serializer):
     """Serializer for Studio home"""
     allow_course_reruns = serializers.BooleanField()

cms/djangoapps/contentstore/rest_api/v1/views/__init__.py

@@ -10,7 +10,7 @@
 from .grading import CourseGradingView  # noqa: F401
 from .group_configurations import CourseGroupConfigurationsView  # noqa: F401
 from .help_urls import HelpUrlsView  # noqa: F401
-from .home import HomePageCoursesView, HomePageLibrariesView, HomePageView  # noqa: F401
+from .home import HomePageLibrariesView, HomePageView  # noqa: F401
 from .proctoring import ProctoredExamSettingsView, ProctoringErrorsView  # noqa: F401
 from .settings import CourseSettingsView  # noqa: F401
 from .textbooks import CourseTextbooksView  # noqa: F401

cms/djangoapps/contentstore/rest_api/v1/views/tests/test_home.py

@@ -14,9 +14,6 @@
 from cms.djangoapps.contentstore.tests.utils import CourseTestCase
 from cms.djangoapps.modulestore_migrator import api as migrator_api
 from cms.djangoapps.modulestore_migrator.data import CompositionLevel, RepeatHandlingStrategy
-
-from common.djangoapps.student.tests.factories import UserFactory
-from openedx.core.djangoapps.content.course_overviews.tests.factories import CourseOverviewFactory
 from openedx.core.djangoapps.content_libraries import api as lib_api
 
 

cms/djangoapps/contentstore/rest_api/v3/views/home.py

@@ -50,7 +50,8 @@
 
 
 class _HomeAutoSchema(AutoSchema):
-    """Override _is_list_view so drf-spectacular treats 'list' as a single-object response."""
+    """Custom AutoSchema that treats the 'list' action as a single-object response."""
+
     def _is_list_view(self, serializer=None):
         if self.view.action == 'list':
             return False
@@ -59,7 +60,6 @@ def _is_list_view(self, serializer=None):
 
 @extend_schema(tags=["openedx-platform-sdk"])
 class HomeViewSet(StandardizedErrorMixin, viewsets.ViewSet):
-    schema = _HomeAutoSchema()
     """
     ViewSet for the Studio home page. Registered via DefaultRouter (basename ``home``).
 
@@ -69,6 +69,7 @@ class HomeViewSet(StandardizedErrorMixin, viewsets.ViewSet):
       GET  /api/contentstore/v3/home/libraries/ → libraries (library list only)
     """
 
+    schema = _HomeAutoSchema()
     authentication_classes = (JwtAuthentication, SessionAuthenticationAllowInactiveUser)
     permission_classes = (IsAuthenticated,)
     serializer_class = StudioHomeSerializer