fix(fe): fix contest problem url

[woo943]

Description

Contest 생성 후 Client Side에서 Problem에 접근하려고 하면 URL이 이상
예시 : https://stage.codedang.com/contest/27//problem/34

Additional context

closes TAS-2765

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[gemini-code-assist]

Code Review

This pull request simplifies the RenderProblemList component by removing the manual transformation of problem IDs. Instead, it passes the raw problemData.data directly to the DataTable component and introduces a new pathSegment="problem" prop to handle path construction. There are no review comments, so I have no feedback to provide.

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[skkuding-bot]

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[seoeun9]

@saeyeon-05 이거 1. management 페이지에서 콘테스트 생성하고 (시작 전으로) 2. 메인 페이지 쪽에서 콘테스트 탭 -> 문제 들어가보셔서 URL 테스트 해주시면 될 거 같아요!

콘테스트 생성 시 import problem에서 문제 아무거나 import해주시면 확인 가능합니다~~