normalize user input

webextension/options.js

@@ -63,6 +63,7 @@ async function saveSettingsAndLogin(event) {
   const backendUrl = backendUrlInput.value.trim();
   const username = usernameInput.value.trim();
   const password = passwordInput.value;
+  const otp = otpInput.value.trim();
 
   if (!backendUrl || !username || !password) {
     setStatus(t('fillAllFields'), true);
@@ -73,7 +74,7 @@ async function saveSettingsAndLogin(event) {
     const response = await fetch(`${backendUrl}/api/auth/login`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ username, password, otp: otpInput.value.trim() || null })
+      body: JSON.stringify({ username, password, otp: otp || null })
     });
 
     if (!response.ok) {