feat(user): 전화번호 정규식 010-XXXX-XXXX 고정

[chanwoo7]

Summary

• 전화번호 검증을 ^010-\d{4}-\d{4}$ (13자 고정)로 강화
• 기존 ^[0-9-]+$ + 7~20자 정책은 '01-2-3' 같은 비정상 패턴도 통과시켜 사실상 비검증 상태였음
• 마이페이지 figma 명세에 맞춰 010 prefix만 허용

변경 사항

• PHONE_REGEX, PHONE_FORMAT_EXAMPLE 상수 추가 (user.constants.ts)
• MIN_PHONE_LENGTH, MAX_PHONE_LENGTH 상수 제거 (정규식으로 대체)
• normalizePhoneNumber: 정규식 단일 검증으로 단순화 + 명확한 에러 메시지
• 회귀 테스트: 정상 3건 + trim 1건 + 비정상 10건 (table-driven)

Breaking 여부

• 부분 Breaking: 기존에 통과하던 비-010 번호, 자릿수 다른 번호가 reject됨
• 영향 범위: completeOnboarding / updateMyProfile 입력 검증
• DB 기존 row: 영향 없음 (읽기 시 검증 안 함, 새 입력만 검증)
• DB 데이터 현재 0건 + 프론트 미개발 → 운영 영향 없음

Test plan

• 로컬 yarn test:cov 통과 (831 tests)
• CI check 통과
• CI coverage-report 통과
• CodeQL 통과

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/mypage-figma-phone-regex

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[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟢	Statements	96.57%	2788/2887
🟢	Branches	86.5%	1596/1845
🟢	Functions	93.08%	592/636
🟢	Lines	96.91%	2544/2625

Test suite run success

831 tests passing in 75 suites.

Report generated by 🧪jest coverage report action from f10dc2c

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!