fix(desktop): paste as text no longer doubles the pasted text

apps/desktop/src/window/DesktopApplicationMenu.test.ts

@@ -183,6 +183,37 @@ describe("DesktopApplicationMenu", () => {
     }),
   );
 
+  // Chromium pastes as plain text for the accelerator on its own. Dispatching
+  // the action as well injects a second paste, which doubles the pasted text.
+  it.effect("leaves the accelerator to Chromium instead of injecting a paste", () =>
+    Effect.gen(function* () {
+      const selectedAction = yield* Deferred.make<string>();
+      const applicationMenuTemplate =
+        yield* Deferred.make<readonly Electron.MenuItemConstructorOptions[]>();
+
+      yield* configureMenu(selectedAction, applicationMenuTemplate);
+
+      const template = yield* Deferred.await(applicationMenuTemplate);
+      const editMenu = template.find((item) => item.label === "Edit");
+      if (!Array.isArray(editMenu?.submenu)) {
+        throw new Error("Expected Edit menu submenu to be an array.");
+      }
+      const pasteAsTextItem = editMenu.submenu.find((item) => item.label === "Paste as Text");
+      if (typeof pasteAsTextItem?.click !== "function") {
+        throw new Error("Expected Paste as Text menu item to have a click handler.");
+      }
+
+      pasteAsTextItem.click(
+        {} as Electron.MenuItem,
+        {} as Electron.BrowserWindow,
+        {
+          triggeredByAccelerator: true,
+        } as unknown as KeyboardEvent,
+      );
+      assert.isFalse(yield* Deferred.isDone(selectedAction));
+    }),
+  );
+
   // Zoom must route through DesktopWindow.zoomMain instead of the Electron
   // zoom roles: the roles zoom whichever webContents has focus, which breaks
   // app zoom while an embedded preview WebContentsView holds focus.

apps/desktop/src/window/DesktopApplicationMenu.ts

@@ -137,7 +137,17 @@ export const make = Effect.gen(function* () {
     const settingsClick = () => {
       runMenuEffect("open-settings", dispatchMenuAction("open-settings"));
     };
-    const pasteAsTextClick = () => {
+    // Chromium already pastes as plain text for this chord, so the accelerator
+    // needs nothing from the menu: the composer and the terminal each arm
+    // themselves from the same keydown. Routing it through the renderer anyway
+    // lands a second, injected paste and doubles the text. Only a menu click,
+    // which produces no keystroke for them to see, needs that round trip.
+    const pasteAsTextClick = (
+      _item: Electron.MenuItem,
+      _window: Electron.BaseWindow | undefined,
+      event: Electron.KeyboardEvent,
+    ) => {
+      if (event.triggeredByAccelerator === true) return;
       runMenuEffect("paste-as-text", dispatchMenuAction("paste-as-text"));
     };
     const zoomClick = (direction: DesktopWindow.MainWindowZoomDirection) => () => {