Render the week's shopping list per mocks 1l, 2b and 2f: the "Supply run" kicker over the week label, the "Shopping list" title with the count still to buy of all items, the helper line, and one surface card per dinner with its Bagel name and day. Items toggle optimistically: a toggle is laid over the server's Supply run while it is pending, toggles are sent one at a time in one mutation scope, the counts follow the server's answers, and a refused toggle puts the item and the count back and says why, with Retry. From tablet up the cards sit in three masonry columns under the Archive link and a Send to Google Chat action that stays unavailable until Feature 19. Archived lists render read-only with an "Archived" tag. The week shown is the Plan's default week, or the Monday given as ?week=. Correct the Supply archive section of ARCHITECTURE.md: title jobs and Freeze are ordered by the shopping service's RWMutex, so a freeze waits for an in-flight title job to store its title or fail. Maestro task 40cc2de5-6628-4b32-a491-ab8e02911d88. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>