Add revision history log and music files ZIP backup

templates/admin/settings.html

@@ -364,6 +364,16 @@
         </form>
       </div>
 
+      <!-- Uploads backup -->
+      <div class="section">
+        <h2>Music Files Backup</h2>
+        <p class="copy-hint">Download all uploaded MP3 and archived revision files as a single ZIP.</p>
+        <form method="POST">
+          <input type="hidden" name="action" value="download_uploads_zip">
+          <button type="submit">Download Music Files ZIP</button>
+        </form>
+      </div>
+
       <!-- System reset spans both columns -->
       <div class="danger-zone">
         <h2>⚠️ Reset System</h2>