userscripts/redmine_enhancer.user.js

// ==UserScript==
// @name         Redmine Enhancer
// @namespace    https://www.cocus.de/
// @version      0.3.0
// @description  try to take over the world, or at least redmine!
// @author       Jens Rey, COCUS
// @encoding     utf-8
// @license      https://creativecommons.org/licenses/by-sa/4.0/
// @match        https://redmine.cocus.com/
// @match        https://redmine.cocus.com/my/page
// @updateURL    https://git.rey.nrw/jens/userscripts/raw/branch/master/redmine_enhancer.user.js
// @downloadURL  https://git.rey.nrw/jens/userscripts/raw/branch/master/redmine_enhancer.user.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    $(document).ready(function() {
        var url = 'https://redmine.cocus.com/issues?query_id=84';
        if ($('#account ul li').size() == 1) {
            window.location.href = 'https://redmine.cocus.com/login?back_url=' + decodeURI(url);
        } else {
            window.location.href = url;
        }
    });
})();