feat: undo mistaken moves, numbered pagination, and quieter Kanban messages

Moves: an order can go back one stage (BACK in app/runtime.py) with an
internal reason, flagged in the history as movements.back. The customer is
not notified and approved finals stay; "production started" and "ready" are
now enqueued once per order, so undoing and redoing a move sends nothing
twice. Dragging only goes forward and highlights the allowed column. Move
errors are in Portuguese.

Lists: the send log, payments (open, resolved as history, all) and quotes
are paged on the server with a total, 20 rows by default (10/20/50/100),
first/previous/page/next/last. The send log filters by destination, status,
event and order. Older finished orders load on demand. The board no longer
carries the send log or payment rows, only the open-payment count.

Kanban: Pagamentos and Integrações are separate tabs; messages are brief,
bottom notifications that clear themselves; wording is shorter.

Full CI integration sequence passes locally, with new checks for undo, paging
and filters.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/LOCAL_SETUP.md

@@ -80,10 +80,15 @@ operator interfaces.
    preselected instead (see "Print files"). Continue with the panel's main
    button through **Fila de impressão → Imprimindo → Finalizado**. **Pedir
    correção** asks for the reason the customer will see; from **Correção** the
-   order returns to **Arte recebida** or **Arte tratada**.
-8. The panel's **Histórico** lists every move. The **Pagamentos e
-   integrações** tab shows the Tiny connection, payments that need a person,
-   and the send log; with the fake adapters every send reads "Registrado
+   order returns to **Arte recebida** or **Arte tratada**. A move made by
+   mistake is undone with **Voltar para …**: one stage back, with an internal
+   reason recorded in the history. The customer is not notified, approved
+   finals stay, and "produção iniciada"/"pedido pronto" are sent only once per
+   order even if the stage is entered again. Dragging a card only goes forward;
+   the columns it can be dropped on are highlighted.
+8. The panel's **Histórico** lists every move. The **Pagamentos** tab lists
+   payments that need a person; **Integrações** shows the Tiny connection and
+   the send log; with the fake adapters every send reads "Registrado
    (simulado)". Download links expire after five minutes; click again for a new
    one. The previous Kanban is kept in git tag `ui-v1`.