docs(changelog): highlight v0.5.0 performance work

Refresh the release summary to emphasize launch time, memory,
and efficiency improvements, and add an enhancement bullet
for the optimization audit

src/pages/changelog.astro

@@ -35,7 +35,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
           
            <div class="version-content">
             <div class="version-resume">
-              <p>This release continues polishing the editor and terminal experience while laying the groundwork for internationalization in Zaguán Blade.</p>
+              <p>This release focuses on deep performance work to improve launch time, reduce memory usage, and make Zaguán Blade more efficient overall.</p>
             </div>
             <div class="changes-section">
               <h3 class="changes-title">
@@ -43,6 +43,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
                 Enhancements
               </h3>
               <ul class="changes-list">
+                <li>Completed a deep audit to optimize <strong>launch time</strong>, <strong>memory usage</strong>, and overall <strong>efficiency</strong>.</li>
                 <li>Started work on <strong>i18n</strong> for <strong>Zaguán Blade</strong>, with <strong>English</strong> and <strong>Spanish (Spain)</strong> planned for this release.</li>
                 <li>Updated to <strong>Vite 8</strong>.</li>
                 <li>Updated <strong>CodeMirror</strong> modules to their latest versions.</li>