Refactor runner and API components to remove IP address handling. Update client and server logic to streamline runner registration and task distribution. Introduce write mutexes for connection management to enhance concurrency control. Clean up whitespace and improve code readability across multiple files.

web/app.js

@@ -241,7 +241,6 @@ function displayRunners(runners) {
                 <h3>${escapeHtml(runner.name)}</h3>
                 <div class="runner-info">
                     <span>Hostname: ${escapeHtml(runner.hostname)}</span>
-                    <span>IP: ${escapeHtml(runner.ip_address)}</span>
                     <span>Last heartbeat: ${lastHeartbeat.toLocaleString()}</span>
                 </div>
                 <div class="runner-status ${isOnline ? 'online' : 'offline'}">

web/src/components/AdminPanel.jsx

@@ -369,9 +369,6 @@ export default function AdminPanel() {
                     <th className="px-6 py-3 text-left text-xs font-medium text-gray-400 uppercase tracking-wider">
                       Hostname
                     </th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-400 uppercase tracking-wider">
-                      IP Address
-                    </th>
                     <th className="px-6 py-3 text-left text-xs font-medium text-gray-400 uppercase tracking-wider">
                       Status
                     </th>
@@ -403,9 +400,6 @@ export default function AdminPanel() {
                         <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-400">
                           {runner.hostname}
                         </td>
-                        <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-400">
-                          {runner.ip_address}
-                        </td>
                         <td className="px-6 py-4 whitespace-nowrap">
                           <span
                             className={`px-2 py-1 text-xs font-medium rounded-full ${