flash works when not in EXE

flash_tool/templates/index.html

@@ -298,7 +298,7 @@
             <p class="subtitle">Firmware Flasher</p>
         </div>
 
-        <form id="flashForm">
+        <form id="flashForm" onsubmit="return false;">
             <div class="port-section">
                 <div class="form-group">
                     <label for="port">Serial Port</label>
@@ -444,6 +444,8 @@
 
         document.getElementById('flashForm').addEventListener('submit', async (e) => {
             e.preventDefault();
+            e.stopPropagation();
+            e.stopImmediatePropagation();
 
             const flashBtn = document.getElementById('flashBtn');
             const progressBar = document.getElementById('progressBar');