feat(ui): add WiFi/network info to self-test

Add informational network status check at the beginning of self-test:
- Shows connection mode (Hotspot, WiFi, or Ethernet)
- Displays SSID/connection name
- Shows IP address and hostname.local
- Add wifi_status endpoint in launcher.php using nmcli

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

html/launcher.php

@@ -542,6 +542,53 @@ if ($type == "linux_memory") {
     echo $output;
 }
 
+if ($type == "wifi_status") {
+    header('Content-Type: application/json');
+
+    $result = array(
+        'connected' => false,
+        'mode' => 'unknown',
+        'ssid' => '',
+        'ip' => '',
+        'hostname' => ''
+    );
+
+    // Get hostname
+    $result['hostname'] = trim(shell_exec('hostname'));
+
+    // Get wlan0 connection info
+    $connection = trim(shell_exec("nmcli -t -f GENERAL.CONNECTION device show wlan0 2>/dev/null | cut -d: -f2"));
+
+    if (!empty($connection) && $connection != '--') {
+        $result['connected'] = true;
+        $result['ssid'] = $connection;
+
+        // Check if it's a hotspot
+        if (strpos(strtolower($connection), 'hotspot') !== false || strpos($connection, 'nebuleair') !== false) {
+            $result['mode'] = 'hotspot';
+        } else {
+            $result['mode'] = 'wifi';
+        }
+
+        // Get IP address
+        $ip = trim(shell_exec("nmcli -t -f IP4.ADDRESS device show wlan0 2>/dev/null | head -1 | cut -d: -f2 | cut -d/ -f1"));
+        if (!empty($ip)) {
+            $result['ip'] = $ip;
+        }
+    } else {
+        // Check if eth0 is connected
+        $eth_ip = trim(shell_exec("nmcli -t -f IP4.ADDRESS device show eth0 2>/dev/null | head -1 | cut -d: -f2 | cut -d/ -f1"));
+        if (!empty($eth_ip)) {
+            $result['connected'] = true;
+            $result['mode'] = 'ethernet';
+            $result['ssid'] = 'Ethernet';
+            $result['ip'] = $eth_ip;
+        }
+    }
+
+    echo json_encode($result);
+}
+
 if ($type == "sshTunnel") {
     $ssh_port=$_GET['ssh_port'];
     $command = 'sudo ssh -i /var/www/.ssh/id_rsa -f -N -R "'.$ssh_port.':localhost:22" -p 50221 -o StrictHostKeyChecking=no "airlab_server1@aircarto.fr"';