feat(ui): add NextPM firmware version button on sensors page

Add a "Firmware Version" button next to "Get Data" in the NextPM card
that calls firmware_version.py and displays the result as a badge.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

html/launcher.php

@@ -608,6 +608,13 @@ if ($type == "npm") {
     echo $output;
 }
 
+if ($type == "npm_firmware") {
+    $port=$_GET['port'];
+    $command = 'sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/NPM/firmware_version.py ' . $port;
+    $output = shell_exec($command);
+    echo $output;
+}
+
 if ($type == "envea") {
     $port=$_GET['port'];
     $name=$_GET['name'];