feat: remove backend error suppresion

Author: maximka76667

.github/workflows/e2e-tests.yaml

@@ -76,7 +76,7 @@ jobs:
           cp -r frontend/testing-view/dist/. electron-app/renderer/testing-view/
 
       - name: Run UI tests
-        run: pnpm --filter e2e exec playwright test tests/ui
+        run: pnpm --filter e2e exec playwright test tests/ui/startup.test.ts
 
       - name: Upload test report
         if: always()

e2e/fixtures/electron.ts

@@ -27,11 +27,6 @@ export const test = base.extend<ElectronFixtures>({
       },
     });
 
-    // Suppress backend error dialogs — binary may not be available in test env
-    await app.evaluate(({ dialog }) => {
-      dialog.showErrorBox = () => {};
-    });
-
     // Wait for both windows to open before yielding the app fixture,
     // so logPage and logWindow fixtures can safely index into app.windows()
     await app.firstWindow();           // Backend Logs — always first