feat: harden content workflows and staging smoke tests

proto/playwright.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig, devices } from '@playwright/test'
+
+export default defineConfig({
+  testDir: './e2e',
+  timeout: 30_000,
+  retries: process.env.CI ? 1 : 0,
+  reporter: [['list'], ['html', { open: 'never' }]],
+  use: {
+    baseURL: process.env.BASE_URL || 'https://stage.mozdit.hu',
+    trace: 'retain-on-failure',
+    screenshot: 'only-on-failure',
+    video: 'retain-on-failure',
+  },
+  projects: [{ name: 'chromium', use: { ...devices['Desktop Chrome'] } }],
+})