Issue 3 (feedback-pruebas): ReorderableListView.padding wrapped
header/rows/footer with a single horizontal value (16), which doubled
up on top of PluriRootHeader's own internal inset -- landing the
title at 36px instead of the 20px every other root uses -- while also
applying card-tier padding to the flat FilaEmisoraPlana rows (row
tier, matching the same widget's fix on Buscar) and leaving the
populated-state top gap at an unwired 4 that didn't match this same
screen's own empty state (0) or the footer CTA's prototype value (8).
Zeroes the list-level padding and gives the header, chip strip, rows,
and footer CTA their own correctly-tiered insets instead.