Group class offerings now carry real dates: the add/edit form takes a
start date plus a sessions control (one-off, or weekly for N sessions;
the end date is computed as start + (N-1) weeks via
Offering::weeklyTermEnd). Dates are validated strictly (Y-m-d) and shown
in the offerings list and on the student-facing class card, including
the weekly session count.
[us_group_classes offering="<id>"] (block attribute offeringId, chosen
from a dropdown of active classes fetched from the public offerings
endpoint) restricts the page to a single class so the enrolment flow can
be embedded on a page dedicated to that class; a pinned class that is no
longer offered reports itself closed instead of falling back to the
catalog.
Offerings are now editable from the admin screen: an Edit button
prefills the shared add/edit form and saving posts usc_action=update.
Updates always preserve the original owner and currency, and non-admin
instructors can only load and update their own offerings. The form also
gains the previously missing description field and an Active toggle (the
admin-UI counterpart of the REST is_active flag) so an edit cannot wipe
data the form never collected.
Closes#59
Co-Authored-By: Claude Fable 5 <[email protected]>
