feat(web): Playwright E2E test suite for critical paths (#152)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/e2e/helpers/auth.ts

@@ -0,0 +1,23 @@
+import type { Page } from '@playwright/test';
+
+export const TEST_USER = {
+  email: process.env['E2E_USER_EMAIL'] ?? 'e2e@example.com',
+  password: process.env['E2E_USER_PASSWORD'] ?? 'password123',
+  name: 'E2E Test User',
+};
+
+export const ADMIN_USER = {
+  email: process.env['E2E_ADMIN_EMAIL'] ?? 'admin@example.com',
+  password: process.env['E2E_ADMIN_PASSWORD'] ?? 'adminpass123',
+  name: 'E2E Admin User',
+};
+
+/**
+ * Fill the login form and submit. Waits for navigation after success.
+ */
+export async function loginAs(page: Page, email: string, password: string): Promise<void> {
+  await page.goto('/login');
+  await page.getByLabel('Email').fill(email);
+  await page.getByLabel('Password').fill(password);
+  await page.getByRole('button', { name: /sign in/i }).click();
+}