fix(desktop): enable default context menu for copy/paste across the app

packages/desktop/src/main.ts

@@ -17,6 +17,7 @@ import {
   getWindowBackgroundColor,
   resolveSystemWindowTheme,
   setupWindowResizeEvents,
+  setupDefaultContextMenu,
   setupDragDropPrevention,
 } from "./window/window-manager.js";
 import { registerDialogHandlers } from "./features/dialogs.js";
@@ -108,6 +109,7 @@ async function createMainWindow(): Promise<void> {
   });
 
   setupWindowResizeEvents(mainWindow);
+  setupDefaultContextMenu(mainWindow);
   setupDragDropPrevention(mainWindow);
   mainWindow.once("ready-to-show", () => {
     mainWindow.show();

packages/desktop/src/window/window-manager.ts

@@ -1,4 +1,4 @@
-import { app, BrowserWindow, ipcMain, nativeTheme } from "electron";
+import { app, BrowserWindow, Menu, ipcMain, nativeTheme } from "electron";
 
 export function readBadgeCount(input: unknown): number {
   if (typeof input !== "number" || !Number.isSafeInteger(input) || input < 0) {
@@ -217,6 +217,18 @@ export function setupWindowResizeEvents(win: BrowserWindow): void {
   });
 }
 
+export function setupDefaultContextMenu(win: BrowserWindow): void {
+  win.webContents.on("context-menu", (_event, params) => {
+    const menu = Menu.buildFromTemplate([
+      { role: "copy", enabled: params.selectionText.length > 0 },
+      { role: "paste" },
+      { type: "separator" },
+      { role: "selectAll" },
+    ]);
+    menu.popup({ window: win });
+  });
+}
+
 /**
  * Prevent Electron from navigating to files dragged onto the window.
  * The renderer handles drag-drop via standard HTML5 APIs instead.