docs(changelog): enable GPT-5.4, tighten grep_search, fix editor test

src/pages/changelog.astro

@@ -49,6 +49,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
                 <li><strong>Zaguán Coder Daemon.</strong> Working on making the Mercury 2 system prompt stronger and better.</li>
                 <li><strong>Zaguán Coder Daemon.</strong> Replaced Gemini 3 Flash Preview with Gemini 3.1 Flash Lite Preview.</li>
                 <li><strong>Zaguán Coder Daemon.</strong> Initial testing support for <a href="https://www.inceptionlabs.ai/blog/introducing-mercury-2" target="_blank" rel="noopener">Inception Mercury 2</a>.</li>
+                <li><strong>Zaguán Coder Daemon.</strong> Enabled OpenAI GPT-5.4 with low and medium reasoning.</li>
               </ul>
             </div>
 
@@ -112,6 +113,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
                 <li><strong>UI.</strong> Added the Project Name to the header and to the window title.</li>
                 <li><strong>Zaguán Blade.</strong> Now sending the local time and date to the model. This helps with year hallucinations and other time related issues.</li>
                 <li><strong>Zaguán Coder Daemon.</strong> Used gemini-cli source code to get the best information on how to handle it in the best possible manner.</li>
+                <li><strong>Zaguán Coder Daemon.</strong> Tightened up <code>grep_search</code> command with a timeout and excluding certain directories to speed things up.</li>
               </ul>
             </div>
 
@@ -141,6 +143,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
                 <li><strong>Terminal.</strong> Fixed a bug where pasting content into the Terminal would paste twice.</li>
                 <li><strong>Chat Panel.</strong> It's now possible to resize the chat panel again.</li>
                 <li><strong>Terminal.</strong> Removed the horizontal resize bar.</li>
+                <li><strong>Editor Test.</strong> Fixed a test case in the editor.</li>
               </ul>
             </div>
           </div>