test(a11y): @axe-core/playwright smoke check for major pages

Phase 4 — wires `@axe-core/playwright` into the smoke suite so any
critical/serious WCAG 2.1 A/AA violation on the main authenticated
pages fails CI.

tests/e2e/smoke/20-accessibility.spec.ts:
  Iterates 6 routes (dashboard, clients, yachts, interests, berths,
  admin/branding) — each navigates after login, waits for
  networkidle, runs AxeBuilder with WCAG2/2.1 A+AA tags, asserts no
  critical/serious violations.

  DISABLED_RULES list trims two known-noisy rules that fire on Radix
  primitives + design-pass-pending muted text:
    - tabindex  (Radix focus traps)
    - color-contrast  (muted body text, pending design pass)

  The list is intentionally small; new entries require a comment and
  an audit. Easier to widen than narrow.

Run: pnpm exec playwright test --project=smoke

No vitest impact (1298/1298 still green); the spec only runs on the
e2e playwright project so the unit suite stays fast.

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

pnpm-lock.yaml

@@ -266,6 +266,9 @@ importers:
         specifier: ^5.0.13
         version: 5.0.13(@types/react@19.2.14)(immer@11.1.7)(react@19.2.6)(use-sync-external-store@1.6.0(react@19.2.6))
     devDependencies:
+      '@axe-core/playwright':
+        specifier: ^4.11.3
+        version: 4.11.3(playwright-core@1.60.0)
       '@eslint/eslintrc':
         specifier: ^3.3.5
         version: 3.3.5
@@ -381,6 +384,11 @@ packages:
   '@asamuzakjp/nwsapi@2.3.9':
     resolution: {integrity: sha512-n8GuYSrI9bF7FFZ/SjhwevlHc8xaVlb/7HmHelnc/PZXBD2ZR49NnN9sMMuDdEGPeeRQ5d0hqlSlEpgCX3Wl0Q==}
 
+  '@axe-core/playwright@4.11.3':
+    resolution: {integrity: sha512-h/kfksv4F0cVIDlKpT4700OehdRgpvuVskuQ2nb7/JmtWUXpe9ftHAPtwyXGvVSsa6SJ64A9ER7Zrzc/sIvC4w==}
+    peerDependencies:
+      playwright-core: '>= 1.0.0'
+
   '@babel/code-frame@7.29.0':
     resolution: {integrity: sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==}
     engines: {node: '>=6.9.0'}
@@ -6160,6 +6168,11 @@ snapshots:
 
   '@asamuzakjp/nwsapi@2.3.9': {}
 
+  '@axe-core/playwright@4.11.3(playwright-core@1.60.0)':
+    dependencies:
+      axe-core: 4.11.4
+      playwright-core: 1.60.0
+
   '@babel/code-frame@7.29.0':
     dependencies:
       '@babel/helper-validator-identifier': 7.28.5