fix: make sure global error handler handles unrejected promises correctly

Resolves https://kolaente.dev/vikunja/frontend/issues/2992

src/message/index.ts

@@ -1,38 +1,40 @@
 import {i18n} from '@/i18n'
 import {notify} from '@kyvg/vue3-notification'
 
-export const getErrorText = (r) => {
-
-	if (r.response && r.response.data) {
-		if(r.response.data.code) {
-			const path = `error.${r.response.data.code}`
+export function getErrorText(r): string {
+	let data = undefined
+	if (r?.response?.data) {
+		data = r.response.data
+	}
+	
+	if (r?.reason?.response?.data) {
+		data = r.reason.response.data
+	}
+	
+	if (data) {
+		if(data.code) {
+			const path = `error.${data.code}`
 			const message = i18n.global.t(path)
 
 			// If message and path are equal no translation exists for that error code
 			if (path !== message) {
-				return [
-					r.message,
-					message,
-				]
+				return message
 			}
 		}
 
-		if (r.response.data.message) {
-			return [
-				r.message,
-				r.response.data.message,
-			]
+		if (data.message) {
+			return data.message
 		}
 	}
 
-	return [r.message]
+	return r.message
 }
 
 export function error(e, actions = []) {
 	notify({
 		type: 'error',
 		title: i18n.global.t('error.error'),
-		text: getErrorText(e),
+		text: [getErrorText(e)],
 		actions: actions,
 	})
 }
@@ -41,7 +43,7 @@ export function success(e, actions = []) {
 	notify({
 		type: 'success',
 		title: i18n.global.t('error.success'),
-		text: getErrorText(e),
+		text: [getErrorText(e)],
 		data: {
 			actions: actions,
 		},