feat(efectivo): the EFE cash receipt book, folio and posting in one step

The office still issues cash receipts from Access (EFE MENU -> EFE). This is
that form: cliente, fecha, monto + moneda, concepto, elaboró (the logged-in
user), fecha de depósito, and a folio that continues the legacy book.

- cash_receipts, folio unique. Next folio = one past the highest of the
  platform's receipts and the imported utilities EFECTIVO journal, so after
  the cutover import it lands on the office's next number (13935 on prod
  today). A typed folio the legacy book already used is refused.
- Issuing a receipt posts its credit in the same database transaction, as
  legacy posted to DATOS2: reference C<folio>, CASH DEPOSIT, pseudo check
  CASH<MMDD><P|D>. Dollars with a rate credit a pesos ledger (1,500 USD at
  16.80 -> 25,200 MXN, as C13830 did). Voiding that row voids the receipt.
- /efectivo: issue, search, record the deposit date; /efectivo/<folio>
  prints the receipt.
- Reporte de efectivo now lists platform receipts by receipt, not by check,
  so each is counted once.

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

apps/web/src/app/efectivo/[folio]/page.tsx

@@ -0,0 +1,98 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { getCashReceipt } from "@/lib/api";
+import { formatDate, formatMoney } from "@/lib/labels";
+import type { CashReceipt, CompanyHeader } from "@/lib/types";
+
+/**
+ * One EFE receipt, laid out to print and hand to the customer. No app shell:
+ * the page is the paper.
+ */
+export default function CashReceiptPrint({ params }: { params: { folio: string } }) {
+  const [r, setR] = useState<(CashReceipt & { company: CompanyHeader }) | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    getCashReceipt(Number(params.folio))
+      .then(setR)
+      .catch((e) => setError((e as Error)?.message ?? "No se encontró el recibo."));
+  }, [params.folio]);
+
+  if (error) return <div className="state-box state-error">{error}</div>;
+  if (!r) return <div className="state-box">Cargando…</div>;
+
+  const c = r.company;
+  const voided = r.transaction.voidedAt != null;
+  const converted = r.exchangeRate != null;
+
+  return (
+    <div style={{ maxWidth: 720, margin: "24px auto", padding: 24, fontSize: 14 }}>
+      <style>{"@media print { .no-print { display: none } body { background: #fff } }"}</style>
+      <div className="no-print" style={{ marginBottom: 16 }}>
+        <button type="button" className="btn btn-primary" onClick={() => window.print()}>
+          Imprimir
+        </button>
+      </div>
+
+      <div style={{ border: "1px solid #333", padding: 24 }}>
+        <div style={{ display: "flex", justifyContent: "space-between", gap: 16 }}>
+          <div>
+            <strong style={{ fontSize: 18 }}>{c.name}</strong>
+            <div>{c.addressLine1}</div>
+            {c.addressLine2 && <div>{c.addressLine2}</div>}
+            <div>{c.cityState}</div>
+            {c.mailingAddress && <div>{c.mailingAddress}</div>}
+            <div>
+              {c.phone} · {c.email}
+            </div>
+            {c.taxId && <div>RFC {c.taxId}</div>}
+          </div>
+          <div style={{ textAlign: "right" }}>
+            <div style={{ fontSize: 18, fontWeight: 700 }}>RECIBO DE EFECTIVO</div>
+            <div style={{ fontSize: 22, fontWeight: 700 }}>Folio {r.folio}</div>
+            <div>{formatDate(r.receivedAt)}</div>
+            {voided && <div style={{ color: "#b00", fontWeight: 700 }}>ANULADO</div>}
+          </div>
+        </div>
+
+        <table style={{ width: "100%", marginTop: 24, borderCollapse: "collapse" }}>
+          <tbody>
+            <Row label="Cliente">
+              {r.customer.name}
+              {r.customer.folderNumber != null && ` · Carpeta ${r.customer.folderNumber}`}
+            </Row>
+            <Row label="Monto">
+              <strong>{formatMoney(r.amount, r.currency)}</strong>
+              {converted &&
+                ` (abonado ${formatMoney(r.transaction.amount, r.transaction.currency)} a T.C. ${Number(r.exchangeRate).toFixed(4)})`}
+            </Row>
+            <Row label="Concepto">{r.concept}</Row>
+            <Row label="Elaboró">{r.preparedBy.name}</Row>
+            {r.depositedAt && <Row label="Fecha de depósito">{formatDate(r.depositedAt)}</Row>}
+          </tbody>
+        </table>
+
+        <div style={{ marginTop: 56, display: "flex", justifyContent: "space-between" }}>
+          <div style={{ borderTop: "1px solid #333", width: 240, textAlign: "center", paddingTop: 4 }}>
+            Recibí
+          </div>
+          <div style={{ borderTop: "1px solid #333", width: 240, textAlign: "center", paddingTop: 4 }}>
+            Entregó
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+function Row({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <tr>
+      <td style={{ padding: "6px 12px 6px 0", width: 160, color: "#555", verticalAlign: "top" }}>
+        {label}
+      </td>
+      <td style={{ padding: "6px 0" }}>{children}</td>
+    </tr>
+  );
+}