Two widgets of the same type (e.g. two Photos widgets) both showed up
as plain "Photos" with no way to tell which was which. The buttons API
now includes each widget's grid placement plus the frame's grid dims;
the UI derives a rough position ("top-left", "right", etc.) from that
and only appends a number+position suffix when a type actually
repeats on the frame, leaving the common single-widget-per-type case
unchanged.
Whiteboard rendering isn't fully reliable yet -- tag it (alpha)
everywhere it's user-facing (widget label, add-widget button, dialog
title, Settings' WebDAV section) via one shared WIDGET_LABELS map
(moved to common.js so both the Layout canvas and the new Configuration
tab section can use it).
Button assignments: a new "Button assignments" card on the
Configuration tab lets you assign an ordered list of (widget, action)
bindings to each physical NEXT/BACK button -- add/remove/reorder, all
autosaved. Backed by new GET/PUT /api/frames/{id}/buttons endpoints;
PUT replaces a button's whole list in one atomic, fully-validated call
rather than separate add/remove/reorder endpoints. Device-side
consumption already existed (routers/device.py's _run_button_actions);
this is the UI for what was previously only reachable via the default
migration mapping.