feat: add copy to clipboard when you press c on a message, stripping the newline at the end

frontend/src/sound.ts

@@ -3,6 +3,7 @@ const audioContext = new AudioContext();
 const soundFiles = {
     intro: 'intro.wav',
     login: 'login.wav',
+    copy: 'copy.wav',
     uploadFailed: 'uploadfail.wav'
 } as const;
 

frontend/src/views/main.ts

@@ -247,6 +247,11 @@ export class MainView extends View {
             this.openMessageDialog(message);
         })
         itm.onKeyDown(async(key: string, alt: boolean | undefined, shift: boolean | undefined, ctrl: boolean | undefined) => {
+            if (key === "c") {
+                navigator.clipboard.writeText(message.content.trim());
+                playSound("copy");
+            }
+
             if (key === "Delete") {
                 await this.removeMessage(message.id);
                 if (this.messageList.children.length === 0) {