Without this, the Geschichten feature ships dark on prod day-one — no group holds BLOG_WRITE, so the editor controls never render even for admins. The mapping "anyone who can write documents can also author family stories" is the safest default and admins can revoke afterwards via the new checkbox UI. Closes Tobias's review S5 on PR #382. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>