Summernote WYSIWYG was mangling Django template syntax ({{ }}, {% %})
on save, causing content to revert to corrupted state. Switched all
template types to the plain code editor textarea which preserves
content exactly as-is.
Also removed jQuery/Summernote JS dependencies from the editor page,
and fixed getEditorContent reference in preview code.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
fe2c657586