Add spacing between command display and download button

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

templates/index.html

@@ -498,7 +498,7 @@
             <div class="download-section" id="downloadSection">
                 <div class="download-info" id="downloadInfo"></div>
                 <div class="command-display" id="commandDisplay"></div>
-                <button class="btn btn-success" id="downloadFileBtn" onclick="downloadFile()" data-i18n="downloadFileBtn">
+                <button class="btn btn-success" id="downloadFileBtn" onclick="downloadFile()" style="margin-top: 15px;" data-i18n="downloadFileBtn">
                     💾 Télécharger le fichier
                 </button>
             </div>