An entry of a registry type with References saved without a reference
passed the dependent recheck (null is always among the options), then
resolved to nothing and vanished from the public tree with its children.
The admin save now refuses it (errors.reference_required).
- The admin refuses a parent from another menu than the one the form
names (errors.parent_menu) instead of moving the entry to the parent's
menu without a word; BeforeSave records the named menu
(MenuEntry.RequestedMenuID).
- An entry moved to another menu moves its descendants in the same
transaction, so the public tree no longer drops them.
- GET /_menu/api/v1/menus/{code}?locale=xx, anonymous, menu-public-api bucket (120/min per client IP)
- classes.BuildTree: published entries nested by parent, sort_order then id, scheme-checked URLs
- registry entries resolved through signpost with url_pattern as the item override and the locale's alternate
- list types keep stored URL and title, generated children follow stored ones; unresolvable entries left out
- TestMenuAPISmoke; README with API, CORS paths, import workflow and Winter adaptations
- go mod tidy records the test dependencies
