diff --git a/app.py b/app.py
index 858e1a3..3c4176e 100644
--- a/app.py
+++ b/app.py
@@ -4246,7 +4246,6 @@ def debug_socket():
     <button onclick="connect()">Polacz</button>
     <button onclick="disconnect()">Rozlacz</button>
     <button onclick="emitTest()">Emit Test</button>
-    <button onclick="simulateBackground()">Symuluj background (30s)</button>
     <button onclick="forcePolling()">Force Polling</button>
     
     <h3>Logi:</h3>
@@ -4259,7 +4258,8 @@ def debug_socket():
         
         function log(msg, color = '#fff') {
             const logEl = document.getElementById('log');
-            logEl.innerHTML += `[${new Date().toLocaleTimeString()}] ${msg}\n`;
+            const time = new Date().toLocaleTimeString();
+            logEl.innerHTML += `[${time}] ${msg}\n`;
             logEl.scrollTop = logEl.scrollHeight;
             logLines++;
             if (logLines > 200) {
@@ -4276,10 +4276,13 @@ def debug_socket():
         }
         
         function connect() {
-            if (socket) socket.disconnect();
+            if (socket) {
+                socket.disconnect();
+                socket = null;
+            }
             
             const transports = isPollingOnly ? ['polling'] : ['polling', 'websocket'];
-            log(`Laczenie transports: ${transports.join(', ')}`);
+            log(`Polaczenie z: ${transports.join(', ')}`);
             
             socket = io('', {
                 transports: transports,
@@ -4288,75 +4291,78 @@ def debug_socket():
                 forceNew: true
             });
             
-            socket.on('connect', () => {
-                log('CONNECTED OK', '#28a745');
+            socket.on('connect', function() {
+                log('CONNECTED OK');
                 updateStatus(true);
-                const transport = socket.io.engine.transport.name;
-                document.getElementById('transport').textContent = transport;
-                document.getElementById('sid').textContent = socket.id?.slice(0,8) + '...';
+                try {
+                    const transport = socket.io.engine.transport.name;
+                    document.getElementById('transport').textContent = transport;
+                    document.getElementById('sid').textContent = socket.id.substring(0,8) + '...';
+                } catch(e) {
+                    log('Transport info error: ' + e.message);
+                }
+                socket.emit('requestfulllist', {listid: 1});
             });
             
-            socket.on('disconnect', (reason) => {
-                log(`DISCONNECTED: ${reason}`, '#dc3545');
+            socket.on('disconnect', function(reason) {
+                log('DISCONNECTED: ' + reason);
                 updateStatus(false);
             });
             
-            socket.on('connect_error', (err) => {
-                log(`CONNECT ERROR: ${err.message} (${err.type})`, '#ffc107');
+            socket.on('connect_error', function(err) {
+                log('CONNECT ERROR: ' + err.message + ' (' + (err.type || 'unknown') + ')');
             });
             
-            socket.onAny((event, ...args) => {
-                log(`RECV ${event}: ${JSON.stringify(args).slice(0,100)}`);
-            });
-            
-            socket.io.engine.on('upgrade', (transport) => {
-                log(`UPGRADE --> ${transport.name}`);
+            socket.onAny(function(event, ...args) {
+                log('RECV ' + event + ': ' + JSON.stringify(args).substring(0,100));
             });
             
             socket.connect();
         }
         
         function disconnect() {
-            if (socket) socket.disconnect();
+            if (socket) {
+                socket.disconnect();
+                socket = null;
+            }
         }
         
         function emitTest() {
-            if (!socket?.connected) return log('Niepolaczony!', '#dc3545');
+            if (!socket || !socket.connected) {
+                log('Niepolaczony!');
+                return;
+            }
             const now = Date.now();
             socket.emit('pingtest', now);
-            log(`SENT pingtest ${now}`);
+            log('SENT pingtest ' + now);
         }
         
         function forcePolling() {
             isPollingOnly = !isPollingOnly;
-            log(`Polling only: ${isPollingOnly}`);
+            log('Polling only: ' + isPollingOnly);
             connect();
         }
         
-        function simulateBackground() {
-            log('Symulacja: zamknij/otworz karte (monitoruj reconnect)');
-        }
-        
-        // STATUS co 30s
-        setInterval(() => {
-            if (socket?.connected) {
-                const transport = socket.io.engine.transport.name;
-                log(`STATUS: ${transport} | SID: ${socket.id?.slice(0,8)} | RTT test --> Emit`);
+        // STATUS check co 30s
+        setInterval(function() {
+            if (socket && socket.connected) {
+                const transport = socket.io.engine ? socket.io.engine.transport.name : 'unknown';
+                log('STATUS OK: ' + transport + ' | SID: ' + (socket.id ? socket.id.substring(0,8) : 'none'));
                 emitTest();
             } else {
                 log('STATUS: Offline');
             }
         }, 30000);
         
-        // Auto start
+        // Start
         connect();
     </script>
-
 </body>
 </html>
     ''')
 
 
+
 # =========================================================================================
 # SOCKET.IO
 # =========================================================================================