fix: show current host if configured api url is /api/v1 instead of "" (#994)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: vikunja/frontend#994
Reviewed-by: dpschen <dpschen@noreply.kolaente.de>
Co-authored-by: konrad <k@knt.li>
Co-committed-by: konrad <k@knt.li>

src/components/misc/api-config.vue

@@ -67,7 +67,7 @@ export default {
 	},
 	computed: {
 		apiDomain() {
-			return parseURL(this.apiUrl).host
+			return parseURL(this.apiUrl).host || parseURL(window.location.href).host
 		},
 	},
 	props: {