A post opened from the Supply archive is now read-only by the screen it is opened from, not by its list's status: SupplyRunPage takes an explicit readOnly mode, which the archive sets whenever a post is open. The current week's post — which the archive API includes — shows the Archived tag, no checkbox, no Send to Google Chat and no offer to make a list, so no PATCH can be sent from the archive. On desktop with no post open, the list beside the archive panel stays this week's editable Supply run. The Week view renders the periods the server sends with their headings, as Month and Year do, instead of flattening them. Maestro task 3cf3a22a-ae31-4f5f-989d-bf09824583d1. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>