docs(site): add remote-access (Tailscale/Cloudflare/ngrok) and honest iOS pages

New high-intent SEO pages:
- /remote-access/ — step-by-step Tailscale, Cloudflare Tunnel, ngrok setups
  for reaching a self-hosted opencode server from Android anywhere. HowTo +
  FAQ + BreadcrumbList structured data.
- /ios/ — honest 'no iOS app yet' page: current Android app, why, options,
  roadmap, how to follow. FAQ + BreadcrumbList structured data.

Added to sitemap.xml; internal links from index, guide, opencode-on-phone,
and troubleshooting.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs-site/guide/index.html

@@ -248,6 +248,7 @@ OPENCODE_SERVER_PASSWORD=yourpassword opencode serve --hostname 0.0.0.0 --port 4
           <li><strong>Cloudflare Tunnel / ngrok</strong> — get a public HTTPS URL such as <code>https://my-opencode.trycloudflare.com</code>.</li>
           <li><strong>Local network</strong> — if the phone and machine share Wi-Fi, use the machine's LAN IP, e.g. <code>http://192.168.1.100:4096</code>.</li>
         </ul>
+        <p class="muted">Need to reach your server from outside your home? See <a href="../remote-access/">access opencode from your phone remotely</a> for step-by-step Tailscale, Cloudflare Tunnel, and ngrok setups.</p>
       </li>
       <li id="step-install">
         <h3>Install OpenCode Mobile</h3>
@@ -305,6 +306,7 @@ OPENCODE_SERVER_PASSWORD=yourpassword opencode serve --hostname 0.0.0.0 --port 4
     <p>
       <a href="../">Home</a>
       <a href="../download/">Download</a>
+      <a href="../remote-access/">Remote access</a>
       <a href="../features/">Features</a>
       <a href="../troubleshooting/">Troubleshooting</a>
       <a href="https://github.com/dzianisv/opencode-mobile">GitHub</a>