Improved client IP and UA handling.

frontend/src/components/RemoteAuthPermit.vue

@@ -53,7 +53,7 @@
       <!-- Device info display (shown when 3 words match a request) -->
       <div v-else-if="deviceInfo" class="device-info">
         <p class="device-permit-text">Permit {{ deviceInfo.action === 'register' ? 'registration' : 'login' }} to <strong>{{ deviceInfo.host }}</strong></p>
-        <p class="device-meta">{{ deviceInfo.user_agent_pretty }}</p>
+        <p class="device-meta">{{ deviceInfo.user_agent_pretty || '—' }}</p>
 
         <p v-if="error" class="error-message" style="margin-top: 0.5rem;">{{ error }}</p>
 

frontend/src/components/SessionList.vue

@@ -30,7 +30,7 @@
                 @keydown="handleItemKeydown($event, session)"
               >
                 <div class="item-top">
-                  <h4 class="item-title">{{ session.user_agent }}</h4>
+                  <h4 class="item-title">{{ session.user_agent || '—' }}</h4>
                   <div class="item-actions">
                     <span v-if="session.is_current && !hoveredIp && !hoveredCredentialUuid" class="badge badge-current">Current</span>
                     <span v-else-if="hoveredSession?.id === session.id" class="badge badge-current">Selected</span>