phase-5: declarations, from generated numbers to a PDF you file yourself

Formulario 120 and 515 assembly, the review screen, approval, the PDF, and the
guided checklist that walks the user through presenting it in Marangatu.

Approval is a promise about what the user actually saw: the numbers are
recomputed on the way in, and if the documents moved since the declaration was
generated the answer is a 409 with the fresh figures stored as a draft, not a
silent approval of numbers nobody read. An approved declaration is never
regenerated or invalidated.

Editing, confirming, rejecting or reclassifying a document flips any ready
declaration covering its period back to draft, which is what the dashboard
reads to stop offering it for review.

The PDF is rendered once and cached against the declaration, so two downloads
are byte for byte the same document; every write that changes the numbers
clears the cache. Approval pre-renders it, and the route renders on demand, so
a failed job costs a wait rather than a missing file. It stays Spanish in both
locales, like the form it mirrors, and carries a BORRADOR watermark until it is
approved.

The seeded declarations are computed through the same code path the product
uses, so their figures agree with the documents behind them.

Three defects the screenshots caught: the floating scan button swallowed the
tap meant for Aprobar on a phone, the summary breakdown reused labels meant for
other screens, and five tab labels collided at 390px.

Tests that can avoid depending on a fresh seed now do; the ones that cannot say
so in the assertion rather than timing out. db:reset warns that the API has to
be stopped first, having learned that the hard way.

293 vitest tests, 59 Playwright tests, rules coverage still 100%, typecheck and
lint clean.

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

apps/web/app/[locale]/(app)/declaraciones/page.tsx

@@ -0,0 +1,12 @@
+import { setRequestLocale } from 'next-intl/server';
+import { DeclarationsScreen } from './declarations-screen';
+
+export default async function DeclarationsPage({
+  params,
+}: {
+  params: Promise<{ locale: string }>;
+}) {
+  const { locale } = await params;
+  setRequestLocale(locale);
+  return <DeclarationsScreen locale={locale} />;
+}