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/page.tsx

@@ -3,6 +3,7 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import Link from "next/link";
 import { AppShell } from "@/components/AppShell";
+import { useCan } from "@/lib/abilities";
 import {
   EXPIRY_WINDOW_DAYS,
   getPolicyFacets,
@@ -54,6 +55,7 @@ export default function PolizasPage() {
 }
 
 function PolizasBrowser() {
+  const canCreate = useCan("policy:create");
   const [stats, setStats] = useState<PolicyStats | null>(null);
   const [facets, setFacets] = useState<PolicyFacets | null>(null);
 
@@ -122,7 +124,13 @@ function PolizasBrowser() {
     <>
       <div className="page-head rise">
         <p className="eyebrow">Cartera de seguros</p>
-        <h1 className="page-title">Pólizas</h1>
+        <div style={{ display: "flex", alignItems: "center", gap: 16 }}>
+          <h1 className="page-title" style={{ margin: 0 }}>Pólizas</h1>
+          <span style={{ flex: 1 }} />
+          {canCreate && (
+            <Link href="/polizas/nuevo" className="btn btn-primary">+ Nueva póliza</Link>
+          )}
+        </div>
         <StatStrip
           stats={stats}
           status={status}