[Refactor/#277] Lighthouse CI 임계값 warn → error 상향

[Seojegyeong]

🚨 관련 이슈

#277

✨ 변경사항

• 🐞 BugFix Something isn't working
• 💻 CrossBrowsing Browser compatibility
• 🌏 Deploy Deploy
• 🎨 Design Markup & styling
• 📃 Docs Documentation writing and editing (README.md, etc.)
• ✨ Feature Feature
• 🔨 Refactor Code refactoring
• ⚙️ Setting Development environment setup
• ✅ Test Test related (storybook, jest, etc.)

✏️ 작업 내용

• perf/no-skeleton 임시 브랜치에서 OverviewDashboard · PlatformDashboard Skeleton 제거 후 BEFORE 수치 측정
• main 브랜치에서 AFTER 수치 측정 (Skeleton 적용 상태)
• lighthouserc.cjs 임계값 warn → error 상향 및 실측값 기반으로 확정

측정 결과 (Desktop / Navigation / /dashboard 3회 평균)

지표	BEFORE (Skeleton 없음)	AFTER (Skeleton 적용)	변화
LCP	1180ms	1048ms	-132ms (-11%) ✅
CLS	0.000172	0.000304	+0.000132
TBT	54ms	54ms	변화 없음

확정된 Lighthouse CI 임계값

지표	임계값	기준
LCP	2000ms	AFTER 평균 1048ms × 2배 마진
CLS	0.1	실측값 0.000304로 사실상 0 수준
TBT	200ms	AFTER 평균 54ms × 2배 마진

😅 미완성 작업

N/A

📢 논의 사항 및 참고 사항

CLS가 BEFORE보다 AFTER에서 소폭 증가(0.000172 → 0.000304)한 것은 Skeleton → 실제 콘텐츠 전환 시 미세한 레이아웃 이동이 발생하기 때문.
두 값 모두 0.1 기준 대비 사실상 0 수준이므로 실사용자 체감 영향 없음.

💬 리뷰어 가이드 (P-Rules)
P1: 필수 반영 (Critical) - 버그 가능성, 컨벤션 위반. 해결 전 머지 불가.
P2: 적극 권장 (Recommended) - 더 나은 대안 제시. 가급적 반영 권장.
P3: 제안 (Suggestion) - 아이디어 공유. 반영 여부는 드라이버 자율.
P4: 단순 확인/칭찬 (Nit) - 사소한 오타, 칭찬 등 피드백.

[coderabbitai]

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Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/#277

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[github-actions]

📚 Storybook 배포 완료

항목	링크
📖 Storybook	https://69a147b60a56365d9e2185ef-jpblvmksef.chromatic.com/
🔍 Chromatic	https://www.chromatic.com/build?appId=69a147b60a56365d9e2185ef&number=440

[jjjsun]

P4: 확인헀습니다!