feat(backoffice): DataTables cliente-only nas 11 listagens com CSV

Fecha o item 6.9 da auditoria (sem server-side/AJAX — todas as tabelas
estão bem abaixo de 60 linhas): ordenação, pesquisa, paginação, pt-PT
e Responsive (colapso em ecrãs estreitos), reaproveitando o botão
"Exportar CSV" já existente.

DataTables 2.3.4 + Responsive 3.0.6 vendorizados em
assets/vendor/datatables-2.3.4/ (mesma versão/decisão do hub.andmore.pt),
nunca de CDN. Tradução pt-PT oficial inline em assets/js/datatables-init.js,
que expõe initDataTable(selector, opts) — cada página dá um id estável à
tabela e marca a coluna de Ações como orderable:false/searchable:false.
Os vendor scripts só carregam nas 10 páginas que os usam (injeção dinâmica
depois do DOMContentLoaded, como o loader do Summernote), não no
header/footer partilhado.

views/admin/trials/index.php ficou de fora de propósito: cada linha tem
um <select> de estado e um <textarea> de notas editados in-line antes de
"Guardar" — um redraw da DataTable a meio dessa edição (ordenar, paginar)
arrisca perder ou baralhar o que ainda não foi submetido.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

assets/vendor/datatables-2.3.4/dataTables.bootstrap5.min.css

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