start mock of file bytes.

components/ui/__tests__/Settings.spec.tsx

@@ -8,6 +8,23 @@ import { Knex } from "knex";
 
 const RENDER_TIME = 1000;
 
+jest.mock('@/app/lib/whisper', () => {
+  const originalModule = jest.requireActual('@/app/lib/whisper');
+
+  return {
+    ...originalModule,
+    Whisper: class {
+      constructor(...args) {
+        originalModule.Whisper.apply(this, args);
+      }
+
+      targetFile = {
+        bytes: jest.fn().mockReturnValue(new Uint8Array([/* mock data */])),
+      };
+    },
+  };
+});
+
 jest.mock("@/app/i18n/api", () => {
   class LanguageServer {
     fetchLanguages = () => {