fix(i18n): add translation for favorite project description

Resolves https://community.vikunja.io/t/missing-strings-in-language-files/3532

frontend/src/i18n/lang/en.json

@@ -226,6 +226,7 @@
     "unfavorite": "Remove this project from favorites",
     "openSettingsMenu": "Open project settings menu",
     "description": "Project description",
+    "favoriteDescription": "This project has all tasks marked as favorites.",
     "create": {
       "header": "New project",
       "titlePlaceholder": "The project's title goes here…",

frontend/src/views/project/ProjectInfo.vue

@@ -27,11 +27,14 @@
 import {computed} from 'vue'
 import DOMPurify from 'dompurify'
 import {useProjectStore} from '@/stores/projects'
+import {useI18n} from 'vue-i18n'
 
 const props = defineProps<{
 	projectId: number
 }>()
 
+const {t} = useI18n()
+
 const projectStore = useProjectStore()
 const project = computed(() => projectStore.projects[props.projectId])
 const htmlDescription = computed(() => {
@@ -39,6 +42,10 @@ const htmlDescription = computed(() => {
 	if (description === '') {
 		return ''
 	}
+	
+	if (project.value.id === -1) {
+		return t('project.favoriteDescription')
+	}
 
 	return DOMPurify.sanitize(description, {ADD_ATTR: ['target']})
 })