Settings ▸ Faces let the switch be turned on with no recognition model
chosen or installed: the box ticked, Settings closed without a word, and
recognition was on with nothing to run. Now the box is enabled only with a
chosen, installed recogniser (and a build that can run models), says
"Choose a model below (Use) to start." on hover, and that hint stays under
it on or off; a box left on by an older build can still be switched off.
faces.enable {enabled: true} refuses without such a model, so the control
channel and MCP cannot reach that state either, and removing the last
recogniser switches recognition off instead of leaving it on with nothing
chosen. Installing a model still chooses it and switches recognition on.
Tests: tests_face_models::recognition_cannot_be_turned_on_without_a_chosen_model
and tests_panels::recognise_faces_stays_off_until_a_model_is_chosen (fails
on main at the first click). Docs: faces.md, parity LR-PREF-PEOPLE.
Jason Baldwin
8a60e3cd30