test: add comprehensive test coverage structure

- Add accessibility tests for ResetPasswordPage component
- Add performance tests for schedule generation
- Add visual regression tests with snapshot baselines
- Establish testing patterns for UI accessibility compliance
- Include performance benchmarks for core utilities

tests/visual/ResetPassword.visual.test.tsx

@@ -0,0 +1,14 @@
+import React from 'react';
+import { render } from '@testing-library/react';
+import ResetPasswordPage from '../../components/auth/ResetPasswordPage';
+
+describe('Visual Baseline: ResetPasswordPage', () => {
+  beforeEach(() => {
+    window.history.replaceState({}, 'Test', '/reset-password?token=demo');
+  });
+
+  test('matches baseline layout for password reset screen', () => {
+    const { container } = render(React.createElement(ResetPasswordPage));
+    expect(container.firstChild).toMatchSnapshot();
+  });
+});