chore: finalize electron desktop migration

packages/app/src/desktop/electron/invoke.ts

@@ -0,0 +1,12 @@
+import { getDesktopHost } from "@/desktop/host";
+
+export async function invokeDesktopCommand<T>(
+  command: string,
+  args?: Record<string, unknown>
+): Promise<T> {
+  const invoke = getDesktopHost()?.invoke;
+  if (typeof invoke !== "function") {
+    throw new Error("Desktop invoke() is unavailable in this environment.");
+  }
+  return (await invoke(command, args)) as T;
+}