feat(exporter): 폰트 최적화 - preconnect(googleapis/gstatic) 및 system-ui 폴백 테스트 추가

lib/exporter/font.optimization.test.ts

@@ -0,0 +1,29 @@
+import { describe, it, expect } from 'vitest'
+import { exportPage } from '@/lib/exporter/html'
+import { pageSchema, type Page } from '@/lib/schema/page'
+
+function makePage(): Page {
+  return pageSchema.parse({
+    title: 'Font Opt',
+    locale: 'en',
+    theme: { primaryColor: '#2563eb', fontFamily: 'Inter' },
+    sections: [ { type: 'hero', props: { heading: 'Hello', subheading: 'World', imageUrl: 'https://img/h.png' } } ],
+    form: { actionUrl: '', fields: [], spamProtection: { honeypotFieldName: '_hp', minSubmitSeconds: 2 } },
+    seo: { title: 't', description: 'd' },
+  })
+}
+
+describe('Exporter - 폰트 최적화', () => {
+  it('head에 폰트 preconnect 링크가 포함된다(googleapis/gstatic)', () => {
+    const out = exportPage(makePage())
+    const html = out.html
+    expect(html).toMatch(/<link rel="preconnect" href="https:\/\/fonts\.googleapis\.com">/)
+    expect(html).toMatch(/<link rel="preconnect" href="https:\/\/fonts\.gstatic\.com" crossorigin>/)
+  })
+
+  it('CSS에 system-ui 폴백이 포함된다', () => {
+    const out = exportPage(makePage())
+    const css = out.css
+    expect(css).toMatch(/font-family:[^;]*system-ui/i)
+  })
+})