feat: add replyMentionToggle plugin

src/plugins/replyMentionToggle/index.tsx

@@ -0,0 +1,47 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2024 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Devs } from "@utils/constants";
+import definePlugin from "@utils/types";
+import { findStoreLazy } from "@webpack";
+import { FluxDispatcher, SelectedChannelStore } from "@webpack/common";
+
+const isMac = navigator.platform.includes("Mac");
+const PendingReplyStore = findStoreLazy("PendingReplyStore");
+
+export default definePlugin({
+    name: "ReplyMentionToggle",
+    description: "Quickly toggle reply mentions by pressing alt+backspace",
+    authors: [Devs.katlyn],
+
+    start() {
+        document.addEventListener("keydown", onKeyDown);
+    },
+    stop() {
+        document.removeEventListener("keydown", onKeyDown);
+    }
+});
+
+function onKeyDown(e: KeyboardEvent) {
+    const isBackspace = e.key === "Backspace";
+    const altPressed = e.altKey || (!isMac && e.metaKey);
+    if (altPressed && isBackspace) {
+        toggleReplyMention();
+    }
+}
+
+function toggleReplyMention(shouldMention?: boolean) {
+    const channelId = SelectedChannelStore.getChannelId();
+    const reply = PendingReplyStore.getPendingReply(channelId);
+
+    if (!reply) return;
+
+    FluxDispatcher.dispatch({
+        type: "SET_PENDING_REPLY_SHOULD_MENTION",
+        channelId,
+        shouldMention: shouldMention === undefined ? !reply.shouldMention : shouldMention
+    });
+}