test: add dashboard redesign tests (refs #201)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/features/dashboard/components/__tests__/ActionBar.test.tsx

@@ -0,0 +1,38 @@
+import { render, screen, fireEvent } from '@testing-library/react';
+import { ActionBar } from '../ActionBar';
+
+describe('ActionBar', () => {
+  it('renders both buttons with correct text', () => {
+    const onAddVehicle = jest.fn();
+    const onLogFuel = jest.fn();
+
+    render(<ActionBar onAddVehicle={onAddVehicle} onLogFuel={onLogFuel} />);
+
+    expect(screen.getByText('Add Vehicle')).toBeInTheDocument();
+    expect(screen.getByText('Log Fuel')).toBeInTheDocument();
+  });
+
+  it('calls onAddVehicle when Add Vehicle button clicked', () => {
+    const onAddVehicle = jest.fn();
+    const onLogFuel = jest.fn();
+
+    render(<ActionBar onAddVehicle={onAddVehicle} onLogFuel={onLogFuel} />);
+
+    const addVehicleButton = screen.getByText('Add Vehicle');
+    fireEvent.click(addVehicleButton);
+
+    expect(onAddVehicle).toHaveBeenCalledTimes(1);
+  });
+
+  it('calls onLogFuel when Log Fuel button clicked', () => {
+    const onAddVehicle = jest.fn();
+    const onLogFuel = jest.fn();
+
+    render(<ActionBar onAddVehicle={onAddVehicle} onLogFuel={onLogFuel} />);
+
+    const logFuelButton = screen.getByText('Log Fuel');
+    fireEvent.click(logFuelButton);
+
+    expect(onLogFuel).toHaveBeenCalledTimes(1);
+  });
+});