fix: add trailingSlash for clean URLs, rename /legal/ to /policies/ (cPanel blocks /legal/ path)

- next.config.ts: enable trailingSlash:true so Next.js generates /page/index.html
  instead of /page.html, enabling Apache DirectoryIndex to serve clean URLs
- Rename src/app/legal/ to src/app/policies/ because cPanel/Apache blocks
  the /legal/ URL path (returns 403 regardless of file permissions)
- Update Footer.tsx and terms page links from /legal/ to /policies/
- .htaccess: add DirectoryIndex directive for subdirectory index.html serving
- All 15 pages verified live on dashcaddy.net returning HTTP 200

src/app/policies/terms/page.tsx

@@ -59,7 +59,7 @@ export default function TermsPage() {
             <h2 className="text-2xl font-semibold text-white mb-4">6. Privacy</h2>
             <p>
               We collect no data. See our{' '}
-              <a href="/legal/privacy" className="text-brand-400 hover:text-brand-300 font-medium">Privacy Policy</a>{' '}
+              <a href="/policies/privacy" className="text-brand-400 hover:text-brand-300 font-medium">Privacy Policy</a>{' '}
               for details.
             </p>
           </section>