feat: warm-up deps — ts-reset, web-vitals, RHF devtool, query-broadcast

Four low-risk adds before the Zod 4 / drizzle-zod headliner:

- @total-typescript/ts-reset: tightens TS stdlib types globally (JSON.parse
  → unknown, fetch().json() → unknown, .filter(Boolean) narrows, Set
  literals respect typed Set targets). Caught 179 latent type errors;
  fixed all production sites (8 files) and added `any` cast escape hatch
  in test files (ESLint exemption scoped to tests/).
- web-vitals + /api/v1/internal/vitals endpoint + WebVitalsReporter
  client component: establishes Core Web Vitals baseline (LCP/INP/CLS/
  FCP/TTFB) via navigator.sendBeacon. Required before optimisation work.
- @hookform/devtools + FormDevtool wrapper: dev-only RHF state inspector,
  lazy-loaded via next/dynamic so the chunk is excluded from prod
  bundles entirely.
- @tanstack/query-broadcast-client-experimental: cross-tab cache sync
  via BroadcastChannel — wired in query-provider.tsx, 1-liner.

Audit doc updated with sections 35 + 36 (PDF stack overhaul + comprehensive
second-pass package sweep) covering ~20 package adoption candidates and
4-5 deprecation candidates.

Verified: tsc clean, vitest 1293/1293 pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/unit/services/documenso-place-fields.test.ts

@@ -130,7 +130,7 @@ describe('placeFields v2 dispatch', () => {
     const [url, init] = fetchMock.mock.calls[0]!;
     expect(url).toBe('https://documenso.test/api/v2/envelope/field/create-many');
     expect((init as RequestInit).method).toBe('POST');
-    const body = JSON.parse(String((init as RequestInit).body));
+    const body = JSON.parse(String((init as RequestInit).body)) as any;
     expect(body.envelopeId).toBe('env-123');
     expect(body.fields[0]).toMatchObject({
       recipientId: 'rec-a',
@@ -198,7 +198,7 @@ describe('placeFields v1 dispatch', () => {
     expect(fetchMock).toHaveBeenCalledTimes(2);
     const firstCall = fetchMock.mock.calls[0]!;
     expect(firstCall[0]).toBe('https://documenso.test/api/v1/documents/doc-123/fields');
-    const firstBody = JSON.parse(String((firstCall[1] as RequestInit).body));
+    const firstBody = JSON.parse(String((firstCall[1] as RequestInit).body)) as any;
     expect(firstBody).toMatchObject({
       recipientId: 42,
       type: 'SIGNATURE',
@@ -227,7 +227,7 @@ describe('placeFields v1 dispatch', () => {
       ],
       'port-1',
     );
-    const body = JSON.parse(String((fetchMock.mock.calls[0]![1] as RequestInit).body));
+    const body = JSON.parse(String((fetchMock.mock.calls[0]![1] as RequestInit).body)) as any;
     expect(body.recipientId).toBe(99);
   });
 
@@ -267,7 +267,7 @@ describe('placeDefaultSignatureFields integration', () => {
       'port-1',
     );
     expect(fetchMock).toHaveBeenCalledTimes(1);
-    const body = JSON.parse(String((fetchMock.mock.calls[0]![1] as RequestInit).body));
+    const body = JSON.parse(String((fetchMock.mock.calls[0]![1] as RequestInit).body)) as any;
     expect(body.fields).toHaveLength(3);
     expect(body.fields.every((f: { type: string }) => f.type === 'SIGNATURE')).toBe(true);
     expect(body.fields.every((f: { pageNumber: number }) => f.pageNumber === 4)).toBe(true);
@@ -293,7 +293,7 @@ describe('placeDefaultSignatureFields integration', () => {
     expect(fetchMock).toHaveBeenCalledTimes(2);
     for (const call of fetchMock.mock.calls) {
       expect(call[0]).toBe('https://documenso.test/api/v1/documents/doc-z/fields');
-      const body = JSON.parse(String((call[1] as RequestInit).body));
+      const body = JSON.parse(String((call[1] as RequestInit).body)) as any;
       expect(body.type).toBe('SIGNATURE');
       expect(body.pageNumber).toBe(1);
       // 88% of 842 = 741 (footer band)