Two defects, both found by driving the real editor in Firefox:
1. The editor drew grab handles with a grab cursor on sets it refuses to
reorder, so the live Food menu looked draggable and did nothing. Handles and
the move buttons are now rendered only when reordering is possible, and the
notice says what can still be done.
2. Reordering was saved only from dragend. Browsers suppress mouse events during
a drag and dragend is not guaranteed to arrive, which left the rows visibly
reordered while the server kept the old order — the drag looked like it
worked and then reverted on reload. The order now commits from dragover after
a pause in the drag, with drop/dragend/mouse events as faster paths, deduped
against the last confirmed order and reported in the page.
To make (1) coherent the Current set may now be reordered while its Pages stay
fixed: order is presentation, media URLs are content-hashed and pages are
rendered per request, so nothing stale can be served (ADR 0006). Archives stay
frozen. Admin pages are no-store and assets cache for 5 minutes, so a fix like
this one is not masked by a stale admin.js.
scripts/check-dnd.mjs drives the real editor and asserts the drag persists; it
is the only automated check that reaches this path.
The store keeps a Menu Set's state in the directory layout (drafts/ versus
published/) and its metadata in a manifest, with publishing as a single
directory rename. Editing is allowed on Drafts only, so a published menu can
never change under a customer. Stages 2 and 3 of docs/plan.md, with tests.
tanshu