docs(changelog): add Gemini 3.1 Pro and performance enhancements

- Add Google Gemini 3.1 Pro to new features in Zaguán Coder Daemon
- Add Enhancements section detailing streaming and context sync optimizations

src/pages/changelog.astro

@@ -41,12 +41,23 @@ import BaseLayout from '../layouts/BaseLayout.astro';
                 New Features
               </h3>
               <ul class="changes-list">
+                <li><strong>Google Gemini 3.1 Pro.</strong> Added Google Gemini 3.1 Pro in Zaguán Coder Daemon.</li>
                 <li><strong>Chunk counting.</strong> Added chunk counting and display for write operations tool calls.</li>
                 <li><strong>Qwen3.5 support.</strong> Added support for Qwen3.5 models in Zaguán Coder Daemon.</li>
                 <li><strong>Claude Sonnet 4.6.</strong> Enabled Claude Sonnet 4.6 in Zaguán Coder Daemon. Restart application to access it.</li>
               </ul>
             </div>
 
+            <div class="changes-section">
+              <h3 class="changes-title">
+                <span class="changes-icon">✨</span>
+                Enhancements
+              </h3>
+              <ul class="changes-list">
+                <li><strong>Performance.</strong> Optimized streaming performance and conversation context synchronization.</li>
+              </ul>
+            </div>
+
             <div class="changes-section">
               <h3 class="changes-title">
                 <span class="changes-icon">🐛</span>