Add Playwright e2e test suite

playwright.config.ts

@@ -0,0 +1,44 @@
+import { defineConfig } from '@playwright/test';
+
+const host = process.env.PLAYWRIGHT_HOST ?? '127.0.0.1';
+const port = Number(process.env.PLAYWRIGHT_PORT ?? '3400');
+const baseURL = process.env.PLAYWRIGHT_BASE_URL ?? `http://${host}:${port}`;
+
+export default defineConfig({
+  testDir: './e2e',
+  fullyParallel: true,
+  forbidOnly: Boolean(process.env.CI),
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  timeout: 30_000,
+  expect: {
+    timeout: 10_000
+  },
+  reporter: [
+    ['list'],
+    ['html', { open: 'never', outputFolder: 'output/playwright/report' }]
+  ],
+  outputDir: 'output/playwright/test-results',
+  use: {
+    baseURL,
+    browserName: 'chromium',
+    trace: 'retain-on-failure',
+    screenshot: 'only-on-failure',
+    video: 'retain-on-failure',
+    viewport: {
+      width: 1440,
+      height: 960
+    }
+  },
+  webServer: {
+    command: 'bun run e2e:webserver',
+    url: baseURL,
+    reuseExistingServer: false,
+    timeout: 120_000,
+    env: {
+      PLAYWRIGHT_BASE_URL: baseURL,
+      PLAYWRIGHT_HOST: host,
+      PLAYWRIGHT_PORT: String(port)
+    }
+  }
+});