feat(policies): full CRUD + child editors + insurance lookups (plan phase 3)

Policy header, all five child collections, and the insurance reference
catalogs become create/edit/delete-able on the RBAC foundation.

API:
- Policy gains archivedAt (soft-delete); list/browser default to
  archivedAt=null with ?includeArchived opt-in.
- PoliciesService: header create/update/archive/restore (customer FK
  validated for a clean 404); add/update/remove for installments,
  vehicles, drivers, beneficiaries, claims — each scoped to its policy so
  one policy's id can't touch another's rows; lookups CRUD for providers,
  policy types, adjusters.
- PoliciesController write routes: header create/update need STAFF+
  (policy:create/update), archive/restore need MANAGER+ (policy:delete),
  every child route needs policy:update. New LookupsController at /lookups
  (read open; mutate needs lookup:manage / MANAGER+). Mutations audited.
- DTOs (policy header, children, lookups); dates coerced; shared coerce.ts.

Web:
- Generic ChildCollection editor (config-driven add/edit/remove table),
  reused by both the policy detail child editors and the catalogs screen.
- PolicyForm (header) with type/provider selects and a debounced
  CustomerPicker; /polizas/nuevo (accepts ?customerId prefill) and
  /polizas/[id]/editar. Policy detail: gated action bar (Editar/Archivar)
  + "Administrar detalles" child editors for all five collections.
- /catalogos admin screen (aseguradoras/tipos/ajustadores), nav-gated on
  lookup:manage. "Nueva póliza" buttons on the list and on the customer
  detail (prefilled). api.ts + types for all of the above.

Verified against dev: policy create (dates coerced, archivedAt null),
installment/vehicle add, VIEWER child-add 403, cross-policy child guard
404, lookups CRUD with VIEWER 403 / MANAGER 201, archive drops from the
default list and includeArchived surfaces it. Both apps compile clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/web/src/app/polizas/nuevo/page.tsx

@@ -0,0 +1,41 @@
+"use client";
+
+import { Suspense } from "react";
+import Link from "next/link";
+import { useSearchParams } from "next/navigation";
+import { AppShell } from "@/components/AppShell";
+import { PolicyForm } from "@/components/PolicyForm";
+import { useCan } from "@/lib/abilities";
+
+export default function NuevaPolizaPage() {
+  return (
+    <AppShell>
+      <Suspense fallback={null}>
+        <NuevaPoliza />
+      </Suspense>
+    </AppShell>
+  );
+}
+
+function NuevaPoliza() {
+  const allowed = useCan("policy:create");
+  const params = useSearchParams();
+  const customerId = params.get("customerId") ?? undefined;
+  const customerName = params.get("customerName") ?? undefined;
+
+  return (
+    <>
+      <div className="page-head">
+        <Link href="/polizas" className="back-link">← Pólizas</Link>
+        <h1 className="page-title">Nueva póliza</h1>
+      </div>
+      {allowed ? (
+        <PolicyForm fixedCustomerId={customerId} fixedCustomerName={customerName} />
+      ) : (
+        <div className="state-box state-error">
+          No tiene permisos para crear pólizas.
+        </div>
+      )}
+    </>
+  );
+}