Audit 4.1 (t4:216): the manage-groups (create_new_folder) and sort
(swap_vert) actions now live in PluriRootHeader's own actions slot as
two icon buttons -- were an ActionChip inside the chip strip plus a
PopupMenuButton sharing a Row with it. The prototype's own back arrow
stays absent (binding decision: this root keeps its bottom tab bar,
unlike the prototype's pushed-with-back-arrow shape) -- this closes
the remaining gap in what was a partial fix.
Audit 4.2 (t4:219-221): group filter chips are solid brand teal with
dark text when active, listSurface + a faint border when not -- was
Material's own ChoiceChip theming (electricMagenta@24% selected).
Updated pantalla_favoritos_test.dart's two "Manage lists" text finders
to locate the relocated action by key instead (the action is now an
icon-only IconButton with a tooltip, not a labelled chip).
FreeTLab
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