문서: MAIN_PLAN Export 폼 a11y(fieldset aria-describedby/help/id) 배치 기록 추가

MAIN_PLAN.md

@@ -291,6 +291,13 @@
   - 드래그 중 라이브리전 가이드 텍스트 노출 확인(가이드 x/y)
 - 결과: 회전 상태에서도 스냅 우선순위 일관성 확보, 라이브리전 가이드 동작 스모크 통과
 
+### Export 폼 a11y: radio fieldset aria-describedby/help/id 연결 (2025-11-18)
+- 테스트: `lib/exporter/formFieldset.a11y.test.ts`
+  - fieldset에 `aria-describedby`로 help id 연결(`field-*-help`)
+  - legend는 label과 동일 텍스트 사용
+  - 각 option은 고유 id(`field-*-opt-*`)와 label for 매핑, 동일 name 공유
+- 결과: 라디오 그룹 a11y 구조 회귀 스냅샷 확보(legend/fieldset/help/id 일관성)
+
 ## 목표
 - 비개발자도 사용 가능한 단일 페이지 랜딩 페이지 빌더.
 - 결과물: 정적 ZIP(HTML/CSS/JS) 다운로드. 이미지: 외부 URL 또는 로컬 업로드(서버 저장 없음, ZIP에 패키징). 폰트는 외부 CDN 허용.

lib/exporter/formError.regression.test.ts

@@ -0,0 +1,52 @@
+import { describe, it, expect } from 'vitest'
+import { exportPage } from '@/lib/exporter/html'
+import type { Page } from '@/lib/schema/page'
+
+const makePage = (overrides: Partial<Page> = {}): Page => ({
+  title: 'Form Error Regression',
+  locale: 'en',
+  theme: { primaryColor: '#0ea5e9', fontFamily: 'Inter' },
+  sections: [],
+  form: {
+    actionUrl: '',
+    fields: [
+      { type: 'text', name: 'name', label: 'Name', required: true, pattern: '^[A-Za-z ]+$', maxLength: 30, help: 'Enter your name' },
+      { type: 'email', name: 'email', label: 'Email', required: true, help: 'We will contact you' },
+      { type: 'textarea', name: 'msg', label: 'Message', required: false, maxLength: 200, help: 'Optional' },
+    ],
+    spamProtection: { honeypotFieldName: '_hp', minSubmitSeconds: 2 },
+  },
+  analytics: { ga4MeasurementId: '', metaPixelId: '', customHeadHtml: '' },
+  seo: { title: 'T', description: 'D' },
+  ...overrides,
+})
+
+describe('Exporter - form error/required/pattern regression', () => {
+  it('adds required/pattern/maxlength attributes and aria-describedby links', () => {
+    const page = makePage()
+    const { html } = exportPage(page)
+
+    // required/pattern on text
+    expect(html).toMatch(/<input[^>]*name="name"[^>]*required/)
+    expect(html).toMatch(/<input[^>]*name="name"[^>]*pattern="\^\[A-Za-z \]\+\$"/)
+    expect(html).toMatch(/<input[^>]*name="name"[^>]*maxlength="30"/)
+    // describedby via help
+    expect(html).toMatch(/<label for="field-name">Name<\/label>/)
+    expect(html).toMatch(/<input[^>]*id="field-name"[^>]*aria-describedby="field-name-help"/)
+    expect(html).toMatch(/<div id="field-name-help" class="form-help">Enter your name<\/div>/)
+
+    // email required + describedby
+    expect(html).toMatch(/<input[^>]*type="email"[^>]*name="email"[^>]*required/)
+    expect(html).toMatch(/<input[^>]*id="field-email"[^>]*aria-describedby="field-email-help"/)
+
+    // textarea maxlength + describedby
+    expect(html).toMatch(/<textarea[^>]*name="msg"[^>]*maxlength="200"/)
+    expect(html).toMatch(/<textarea[^>]*id="field-msg"[^>]*aria-describedby="field-msg-help"/)
+  })
+
+  it('CSS includes :invalid rule for error state', () => {
+    const page = makePage()
+    const { css } = exportPage(page)
+    expect(css).toMatch(/input:invalid,select:invalid,textarea:invalid\{[^}]*border-color/)
+  })
+})

lib/exporter/formFieldset.a11y.test.ts

@@ -0,0 +1,39 @@
+import { describe, it, expect } from 'vitest'
+import { exportPage } from '@/lib/exporter/html'
+import type { Page } from '@/lib/schema/page'
+
+const makePage = (overrides: Partial<Page> = {}): Page => ({
+  title: 'Fieldset A11y',
+  locale: 'en',
+  theme: { primaryColor: '#0ea5e9', fontFamily: 'Inter' },
+  sections: [],
+  form: {
+    actionUrl: '',
+    fields: [
+      { type: 'radio', name: 'plan', label: 'Plan', options: ['Basic','Pro'], required: false, help: 'Choose your plan' },
+    ],
+    spamProtection: { honeypotFieldName: '_hp', minSubmitSeconds: 2 },
+  },
+  analytics: { ga4MeasurementId: '', metaPixelId: '', customHeadHtml: '' },
+  seo: { title: 'T', description: 'D' },
+  ...overrides,
+})
+
+describe('Exporter - radio fieldset a11y', () => {
+  it('fieldset gets aria-describedby to help id; legend equals label; options share name', () => {
+    const page = makePage()
+    const { html } = exportPage(page)
+
+    // fieldset with describedby
+    expect(html).toMatch(/<fieldset[^>]*aria-describedby="field-plan-help"/)
+    // legend uses label
+    expect(html).toMatch(/<legend>Plan<\/legend>/)
+    // help element id matches describedby target
+    expect(html).toMatch(/<div id="field-plan-help" class="form-help">Choose your plan<\/div>/)
+    // radio inputs share name and ids are unique
+    expect(html).toMatch(/<input id="field-plan-opt-0" type="radio" name="plan"[^>]*value="Basic"/)
+    expect(html).toMatch(/<label for="field-plan-opt-0">Basic<\/label>/)
+    expect(html).toMatch(/<input id="field-plan-opt-1" type="radio" name="plan"[^>]*value="Pro"/)
+    expect(html).toMatch(/<label for="field-plan-opt-1">Pro<\/label>/)
+  })
+})

lib/exporter/html.ts

@@ -314,6 +314,7 @@ function buildCss(page: Page) {
   label{ display:block; margin: .5rem 0 }
   button{ background: var(--primary); color:#fff; border:none; padding:.75rem 1rem; border-radius:.5rem }
   button:focus, a:focus, input:focus, select:focus, textarea:focus{ outline: 3px solid #2563eb; outline-offset:2px }
+  input:invalid,select:invalid,textarea:invalid{ border-color:#ef4444 }
   .faq-list{ list-style:none; padding:0; margin:0 }
   .faq-item{ margin: .75rem 0 }
   .faq-q{ font-size: 1rem; font-weight:600; overflow-wrap:anywhere }