Add comprehensive .gitignore

maternal-web/jest.setup.ts

@@ -0,0 +1,42 @@
+import '@testing-library/jest-dom'
+
+// Mock Next.js router
+jest.mock('next/navigation', () => ({
+  useRouter: () => ({
+    push: jest.fn(),
+    replace: jest.fn(),
+    prefetch: jest.fn(),
+    back: jest.fn(),
+    pathname: '/',
+    query: {},
+    asPath: '/',
+  }),
+  usePathname: () => '/',
+  useSearchParams: () => new URLSearchParams(),
+}))
+
+// Mock window.matchMedia
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: jest.fn().mockImplementation((query) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(),
+    removeListener: jest.fn(),
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  })),
+})
+
+// Mock IntersectionObserver
+global.IntersectionObserver = class IntersectionObserver {
+  constructor() {}
+  disconnect() {}
+  observe() {}
+  takeRecords() {
+    return []
+  }
+  unobserve() {}
+}