Replaces the flat TagManageRow list with a virtualized grid of
TagManageTile cards using @tanstack/react-virtual and dynamic measured
heights (46px idle, 82px when editing/confirming). Adds a filter input
and a sort dropdown (most-used / least-used / A-Z / Z-A). renameTag and
deleteTag no longer clear exploreTagEntries on invalidation so the
manager keeps its filter/sort state during the background refresh.
Light-theme overrides cover all new tag-manager class names.
LyAhn
af3c8418ee