Des scripts, c'est :noel:

// ==UserScript==
// @author        SirSeingeur
// @name          Sir Select Cite
// @namespace     https://avenoel.org/forum
// @version       0.1
// @icon          https://avenoel.org/favicon.ico
// @match         *://avenoel.org/*
// @grant         GM_addStyle
// @grant         GM_log
// ==/UserScript==

(function() {

    if (!$(".message-actions").length) {
        GM_log("there's no '.message-actions' on this page");
    } else if (!$("#form").length) {
        GM_log("there's no '#form' on this page");
    } else {
        GM_addStyle(`
            .ssc-open:hover {
                cursor: pointer;
            }
        `);

        let postContent = $(".post-content").last();

        $(".message-actions").each(function() {
            let pseudo = "undefined";
            let msgContent = $(this).closest(".message-wrapper").find(".message-content");
            let msgUrl = $(this).find(".message-quote").attr("href");

            // https://i.imgur.com/7j1k8I2.png
            // https://i.imgur.com/fMr3nE3.png

            let htmlIcon = $(`
                <li>
                    <a class='message-quote ssc-open' title='Citer une partie du message'>
                        <img src='https://i.imgur.com/7j1k8I2.png' alt='Icône citation partiel'/>
                    </a>
                </li>
            `);

            let htmlSelect = $(`
                <div hidden>
                    <textarea readonly class="form-control ssc-message" style='margin-bottom: 15px;' rows='8'></textarea>
                    <div>
                        <button type='button' class='btn btn-primary ssc-cancel'>Annuler</button>
                        <button type='button' class='btn btn-primary ssc-cite'>Citer la sélection</button>
                    </div>
                </div>
            `);

            let btOpen = htmlIcon.find(".ssc-open");
            let btCite = htmlSelect.find(".ssc-cite");
            let btCancel = htmlSelect.find(".ssc-cancel");
            let txMessage = htmlSelect.find(".ssc-message");
            let initialized = false;

            function hideSelect() {
                htmlSelect.hide();
                msgContent.show();
            }

            function showSelect() {
                msgContent.hide();
                htmlSelect.show();
            }

            btOpen.on("click", () => {
                if (htmlSelect.is(':visible')) {
                    hideSelect();
                } else {
                    if (initialized) {
                        showSelect();
                        return;
                    }

                    $.get(msgUrl).done(t => {
                        if (null !== t.error)
                            alert(t.error);
                        else {
                            initialized = true;
                            pseudo = t.quote.split("\n")[0].slice(2);
                            let message = t.quote.split("\n").slice(1).map(l => l.slice(2)).join("\n");
                            txMessage.val(message);
                            showSelect();
                        }
                    });
                }
            });

            btCancel.on("click", hideSelect);
            btCite.on("click", () => {
                let cite = txMessage.selection().split("\n").map(l => "> " + l).join("\n");
                postContent.val(`${postContent.val()}\n>>${pseudo}\n${cite}`);
                hideSelect();
                document.location = "#form";
                postContent.change();
            });

            $(this).append(htmlIcon);
            msgContent.after(htmlSelect);
        })
    }

})();

/*
function(t) {
  t.preventDefault();
  $(this).parents(".topic-message").attr("id");
  $.get($(this).attr("href")).done(function(t) {
    null !== t.error ? alert(t.error) : ($(".post-content").last().val($(".post-content").last().val() + t.quote), $(".post-content").last().focus(), document.location = "#form")
  })
}
*/