Add embedded Swagger UI page with auto-injected JWT auth

- New /swagger route with lazy-loaded SwaggerPage that initializes
  swagger-ui-dist and injects the session JWT via requestInterceptor
- Move API link from primary nav to navRight utility area (pill style)
- Code-split swagger chunk (~1.4 MB) so main bundle stays lean

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/swagger/SwaggerPage.module.css

@@ -0,0 +1,5 @@
+.container {
+  max-width: 1440px;
+  margin: 0 auto;
+  padding: 24px;
+}

ui/src/pages/swagger/SwaggerPage.tsx

@@ -0,0 +1,29 @@
+import { useEffect, useRef } from 'react';
+import { useAuthStore } from '../../auth/auth-store';
+import SwaggerUI from 'swagger-ui-dist/swagger-ui-es-bundle.js';
+import 'swagger-ui-dist/swagger-ui.css';
+import styles from './SwaggerPage.module.css';
+
+export function SwaggerPage() {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const token = useAuthStore((s) => s.accessToken);
+
+  useEffect(() => {
+    if (!containerRef.current) return;
+    containerRef.current.innerHTML = '';
+
+    SwaggerUI({
+      url: '/api/v1/api-docs',
+      domNode: containerRef.current,
+      deepLinking: true,
+      requestInterceptor: (req: Record<string, unknown>) => {
+        if (token) {
+          (req.headers as Record<string, string>)['Authorization'] = `Bearer ${token}`;
+        }
+        return req;
+      },
+    });
+  }, [token]);
+
+  return <div ref={containerRef} className={styles.container} />;
+}