Update frontend to support file scanning via VirusTotal

frontend/index.html

@@ -52,6 +52,18 @@
     <button type="submit">Analyze Audio</button>
   </form>
   <pre id="audioResult"></pre>
+  <hr>
+
+  <!-- FILE (VirusTotal) -->
+  <h2>General File Analysis (PDF, ZIP, EXE, etc. via VirusTotal)</h2>
+  <form id="fileForm">
+    <label>Upload any suspicious file:<br>
+      <input type="file" id="fileInput">
+    </label><br>
+    <button type="submit">Analyze File</button>
+  </form>
+  <pre id="fileResult"></pre>
+
 
   <script>
     const BASE = "";
@@ -117,6 +129,13 @@
       if (!file) return;
       postFile("/analyze/audio", file, "audioResult", null);
     });
+
+    document.getElementById("fileForm").addEventListener("submit", e => {
+      e.preventDefault();
+      const file = document.getElementById("fileInput").files[0];
+      if (!file) return;
+      postFile("/analyze/file", file, "fileResult", null);
+    });
   </script>
 </body>
 </html>