logs: handle logs not found (logrotated)

we show an error message in the UI now

frontend/src/components/LogsViewer.vue

@@ -26,7 +26,7 @@
 
 <script>
 
-import { Button, TopBar, MainLayout } from 'pankow';
+import { TopBar, MainLayout } from 'pankow';
 
 import LogsModel from '../models/LogsModel.js';
 import AppModel from '../models/AppModel.js';
@@ -36,7 +36,6 @@ const API_ORIGIN = import.meta.env.VITE_API_ORIGIN ? 'https://' + import.meta.en
 export default {
   name: 'LogsViewer',
   components: {
-    Button,
     MainLayout,
     TopBar
   },
@@ -159,7 +158,7 @@ export default {
     this.logsModel.stream((time, html) => {
       newLogLines.push({ time, html });
     }, function (error) {
-      console.error('Failed to start log stream:', error);
+      newLogLines.push({ time: error.time, html: error.html });
     })
   }
 };