[AliAlfaifi]

Summary

POST /api/fx/courses/v1/courses/ creates the course with modulestore().create_course(...) directly, so it bypasses Studio's course-creation code. The platform fork is gaining an opt-in setting, NEW_COURSE_CATALOG_VISIBILITY (nelc/edx-platform#106), that makes new courses start with a configured catalogue visibility (for example hidden until an author publishes them). This applies the same setting here so API-created courses behave like Studio-created ones.

Change

CourseCreateSerializer.create: when settings.NEW_COURSE_CATALOG_VISIBILITY is set, add catalog_visibility to the fields passed to create_course. Unset / None / not defined → no change.

Testing

• New parametrized test test_create_catalog_visibility_setting (set, None, not defined).
• Full suite on the teak environment: 2,253 passed, 100% coverage gate met.
• flake8, pycodestyle, pydocstyle, isort --check-only, mypy clean; pylint 10.00/10 on the changed files.
• Not run: redwood and sumac environments.

Notes

• No version bump in this PR.
• Seen, not changed here: update_course_discussions_settings calls update_item from the LMS without draft_preferred — the same class of issue fixed for certificates in fix: write course certificate settings to the draft branch #395.

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