- Fix `ContentPage.store_id is None` (Python identity check, always
False) → use `.is_(None)` for proper SQLAlchemy NULL filtering
- Create pages for ALL platforms instead of only OMS
- Merge create_platform_pages.py into create_default_content_pages.py
(5 overlapping pages, only platform_homepage was unique)
- Delete redundant create_platform_pages.py
- Update Makefile, install.py, and docs references
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>