test: add playwright e2e test setup with smoke tests

tests/e2e/smoke.e2e.ts

@@ -0,0 +1,23 @@
+import { expect, test } from "@playwright/test";
+
+test("redirects protected pages to login", async ({ page }) => {
+  const response = await page.goto("/");
+
+  expect(response?.status()).toBeLessThan(400);
+  await expect(page).toHaveURL(/\/login$/u);
+});
+
+test("renders the login page", async ({ page }) => {
+  await page.goto("/login");
+
+  await expect(page.getByRole("textbox", { name: /email address/iu })).toBeVisible();
+  await expect(page.locator('input[name="password"]')).toBeVisible();
+  await expect(page.getByRole("button", { name: /sign in/iu })).toBeVisible();
+});
+
+test("serves static assets without authentication", async ({ request }) => {
+  const response = await request.get("/dist/tailwind.css");
+
+  expect(response.status()).toBe(200);
+  expect(response.headers()["content-type"]).toContain("text/css");
+});