feat: Implement Playwright testing setup

tests/helpers/page-objects/LoginPage.ts

@@ -0,0 +1,48 @@
+/**
+ * Login Page Object Model
+ * 
+ * Encapsulates interactions with the login page.
+ */
+
+import { Page, expect } from '@playwright/test';
+
+export class LoginPage {
+  constructor(private page: Page) {}
+
+  async goto() {
+    await this.page.goto('/auth');
+    await this.page.waitForLoadState('networkidle');
+  }
+
+  async login(email: string, password: string) {
+    await this.page.fill('input[type="email"]', email);
+    await this.page.fill('input[type="password"]', password);
+    await this.page.click('button[type="submit"]');
+  }
+
+  async expectLoginSuccess() {
+    // Wait for navigation away from auth page
+    await this.page.waitForURL('**/', { timeout: 10000 });
+    
+    // Verify we're on homepage or dashboard
+    await expect(this.page).not.toHaveURL(/\/auth/);
+  }
+
+  async expectLoginError(message?: string) {
+    // Check for error toast or message
+    if (message) {
+      await expect(this.page.getByText(message)).toBeVisible();
+    } else {
+      // Just verify we're still on auth page
+      await expect(this.page).toHaveURL(/\/auth/);
+    }
+  }
+
+  async clickSignUp() {
+    await this.page.click('text=Sign up');
+  }
+
+  async clickForgotPassword() {
+    await this.page.click('text=Forgot password');
+  }
+}