fix: instance ticker (#8260)

* add type and default values

* remove unnecessary string operation

packages/client/src/components/instance-ticker.vue

@@ -7,15 +7,27 @@
 
 <script lang="ts" setup>
 import { } from 'vue';
+import { instanceName } from '@/config';
 
 const props = defineProps<{
-	instance: any; // TODO
+	instance?: {
+		faviconUrl?: string
+		name: string
+		themeColor?: string
+	}
 }>();
 
-const themeColor = props.instance.themeColor || '#777777';
+// if no instance data is given, this is for the local instance
+const instance = props.instance ?? {
+	faviconUrl: '/favicon.ico',
+	name: instanceName,
+	themeColor: (document.querySelector('meta[name="theme-color-orig"]') as HTMLMetaElement)?.content
+};
+
+const themeColor = instance.themeColor ?? '#777777';
 
 const bg = {
-	background: `linear-gradient(90deg, ${themeColor}, ${themeColor + '00'})`
+	background: `linear-gradient(90deg, ${themeColor}, ${themeColor}00)`
 };
 </script>