chore: PS 데이터 잔재 전면 제거 + 국어 통계 차단 확인

- backend study-logs: psProblemId input/include/응답매핑/검증 제거 - frontend study-logs/[id]: PS 전용 렌더링(PsTypeBadge, TierBadge, BOJ 링크, normalizePsTags, getTierColor 등) 전부 제거, problem null 시 fallback 유지 - frontend study/history: PS 뱃지 렌더링/헬퍼 제거 - frontend onboarding: GoalType 'ps' 항목, BOJ 핸들 연결 UI, 관련 state 제거 - frontend api.ts: GoalType 'ps', psProblem 타입, getBojTierLabel 제거 국어 통계는 backend stats.service 의 name='수학' 필터로 이미 차단 확인. Prisma schema 의 PsProblem/PsBookmark 모델은 유지 (마이그레이션 없음).
2026-04-16 11:52:04 +09:00
parent 03ce2c64fd
commit 07be0c581a
5 changed files with 24 additions and 399 deletions
--- a/backend/src/study-logs/study-logs.service.ts
+++ b/backend/src/study-logs/study-logs.service.ts
@@ -18,7 +18,6 @@ export interface CreateStudyLogInput {
  subjectId: number;
  tagId?: number;
  problemId?: number;
-  psProblemId?: number;
  title: string;
  difficulty: number;
  baseCorrectRate?: number | null;
@@ -306,15 +305,6 @@ export class StudyLogsService {
      include: {
        subject: { select: { id: true, name: true, color: true } },
        tag: { select: { id: true, name: true } },
-        psProblem: {
-          select: {
-            bojId: true,
-            title: true,
-            titleKo: true,
-            level: true,
-            tags: true,
-          },
-        },
        reviewSchedules: {
          orderBy: { scheduledAt: "desc" },
          take: 1,
@@ -332,15 +322,6 @@ export class StudyLogsService {
      include: {
        subject: { select: { id: true, name: true, color: true } },
        tag: { select: { id: true, name: true } },
-        psProblem: {
-          select: {
-            bojId: true,
-            title: true,
-            titleKo: true,
-            level: true,
-            tags: true,
-          },
-        },
        problem: {
          include: {
            passage: true,
@@ -370,16 +351,6 @@ export class StudyLogsService {
      baseCorrectRate: log.baseCorrectRate,
      subject: log.subject,
      tag: log.tag,
-      psProblem: log.psProblem
-        ? {
-            bojId: log.psProblem.bojId,
-            title: log.psProblem.title,
-            titleKo: log.psProblem.titleKo,
-            level: log.psProblem.level,
-            tags: log.psProblem.tags,
-            bojUrl: `https://www.acmicpc.net/problem/${log.psProblem.bojId}`,
-          }
-        : null,
      problem: log.problem
        ? {
            id: log.problem.id,
@@ -466,12 +437,6 @@ export class StudyLogsService {
      if (!problem) throw new NotFoundException("problem");
    }

-    if (input.psProblemId) {
-      const psProblem = await db.psProblem.findUnique({
-        where: { id: input.psProblemId },
-      });
-      if (!psProblem) throw new NotFoundException("psProblem");
-    }
  }

  private async createInTransaction(
@@ -492,7 +457,6 @@ export class StudyLogsService {
        subjectId: input.subjectId,
        tagId: input.tagId ?? null,
        problemId: input.problemId ?? null,
-        psProblemId: input.psProblemId ?? null,
        title: input.title,
        difficulty: clamp01(input.difficulty),
        baseCorrectRate: input.baseCorrectRate ?? null,
--- a/frontend/src/app/onboarding/page.tsx
+++ b/frontend/src/app/onboarding/page.tsx
@@ -16,7 +16,6 @@ import { theme, PERSONA_ORDER } from '@/styles/theme';
 type Step = 1 | 2 | 3 | 4;

 const STEP_COUNT = 4;
-const BOJ_HANDLE_REGEX = /^[a-zA-Z0-9_-]{3,20}$/;
 const DEFAULT_REVIEW_INTENSITY: ReviewIntensity = 'moderate';
 const GOAL_TYPE_OPTIONS: Array<{
  value: GoalType;
@@ -28,11 +27,6 @@ const GOAL_TYPE_OPTIONS: Array<{
    label: '수학 수능',
    desc: '수능 수학 단원별 복습 + 4단원 전략',
  },
-  {
-    value: 'ps',
-    label: 'PS (Solved.ac)',
-    desc: '백준 문제 풀이 이력을 자동으로 복습 큐에 편입',
-  },
  {
    value: 'certificate',
    label: '자격증 시험',
@@ -76,16 +70,8 @@ function OnboardingBody() {
  const [currentGrade, setCurrentGrade] = useState(4);
  const [targetGrade, setTargetGrade] = useState(2);
  const [focusUnits, setFocusUnits] = useState<MathUnit[]>(['common']);
-  const [bojHandle, setBojHandle] = useState('');
-  const [syncAfterSave, setSyncAfterSave] = useState(false);
  const [persona, setPersona] = useState<Persona>('mid');

-  useEffect(() => {
-    if (goalType !== 'ps' && syncAfterSave) {
-      setSyncAfterSave(false);
-    }
-  }, [goalType, syncAfterSave]);
-
  useEffect(() => {
    let cancelled = false;

@@ -95,15 +81,15 @@ function OnboardingBody() {
        if (cancelled) return;
        const me = response.data;
        setNickname(me.nickname);
+        const rawGoal = me.goalType as string | null | undefined;
        const nextGoal: GoalType =
-          me.goalType ??
-          (me.focusUnits && me.focusUnits.length > 0
-            ? 'math-suneung'
-            : me.bojHandle
-              ? 'ps'
+          rawGoal && rawGoal !== 'ps'
+            ? (rawGoal as GoalType)
+            : me.focusUnits && me.focusUnits.length > 0
+              ? 'math-suneung'
              : me.targetExamYear === null
                ? 'none'
-                : 'math-suneung');
+                : 'math-suneung';
        setGoalType(nextGoal);
        setTargetExamYear(me.targetExamYear ?? upcomingExamYear);
        setCurrentGrade(me.currentGrade ?? 4);
@@ -111,8 +97,6 @@ function OnboardingBody() {
        const nextUnits =
          me.focusUnits && me.focusUnits.length > 0 ? me.focusUnits : (['common'] as MathUnit[]);
        setFocusUnits(nextUnits);
-        setBojHandle(me.bojHandle ?? '');
-        setSyncAfterSave(false);
        setPersona(me.persona);
      })
      .catch(() => {
@@ -131,7 +115,7 @@ function OnboardingBody() {
    };
  }, [upcomingExamYear]);

-  const skipGradeStep = goalType === 'none' || goalType === 'ps';
+  const skipGradeStep = goalType === 'none';
  const effectiveStepCount = skipGradeStep ? STEP_COUNT - 1 : STEP_COUNT;
  const visibleStep = skipGradeStep && step >= 3 ? step - 1 : step;

@@ -166,17 +150,6 @@ function OnboardingBody() {
        setErr('최소 1개 이상의 단원을 선택해 주세요.');
        return;
      }
-      if (goalType === 'ps') {
-        const trimmedHandle = bojHandle.trim();
-        if (trimmedHandle && !BOJ_HANDLE_REGEX.test(trimmedHandle)) {
-          setErr('BOJ 핸들을 다시 확인해 주세요.');
-          return;
-        }
-        if (!trimmedHandle && syncAfterSave) {
-          setErr('동기화를 하려면 BOJ 핸들을 입력해야 합니다.');
-          return;
-        }
-      }
    }

    setStep((current) => Math.min(current + 1, STEP_COUNT) as Step);
@@ -204,7 +177,6 @@ function OnboardingBody() {
    setSaving(true);
    setErr(null);

-    const trimmedHandle = bojHandle.trim();
    const trimmedNickname = nickname.trim();
    const payload: Record<string, unknown> = {
      nickname: trimmedNickname,
@@ -213,7 +185,6 @@ function OnboardingBody() {
      focusSubjects: goalType === 'none' ? [] : ['수학'],
      focusUnits: goalType === 'math-suneung' ? focusUnits : [],
      onboarded: true,
-      bojHandle: goalType === 'ps' ? trimmedHandle || null : null,
    };

    if (goalType === 'math-suneung') {
@@ -223,11 +194,7 @@ function OnboardingBody() {
    }

    const requestBody = Object.fromEntries(
-      Object.entries(payload).filter(([key, value]) => {
-        if (value === undefined) return false;
-        if (value === null && key !== 'bojHandle') return false;
-        return true;
-      }),
+      Object.entries(payload).filter(([, value]) => value !== undefined && value !== null),
    ) as Record<string, unknown>;

    try {
@@ -248,10 +215,6 @@ function OnboardingBody() {
      if (goalType === 'math-suneung' && focusUnits.length === 0) {
        setFocusUnits(['common']);
      }
-      if (goalType === 'ps') {
-        setBojHandle('');
-        setSyncAfterSave(false);
-      }
      setStep(4);
      return;
    }
@@ -344,9 +307,7 @@ function OnboardingBody() {
                  </FieldHint>
                ) : (
                  <FieldHint>
-                    {goalType === 'ps'
-                      ? 'PS 트랙은 D-day 없이 Solved.ac 동기화만 설정하면 됩니다.'
-                      : '해당 GoalType 전용 콘텐츠는 준비 중입니다. 기본 루틴으로 먼저 시작할 수 있어요.'}
+                    해당 GoalType 전용 콘텐츠는 준비 중입니다. 기본 루틴으로 먼저 시작할 수 있어요.
                  </FieldHint>
                )}
              </Field>
@@ -408,40 +369,9 @@ function OnboardingBody() {

                <SelectionMeta>{focusUnits.length}개 선택됨</SelectionMeta>
              </>
-            ) : goalType === 'ps' ? (
-              <>
-                <StepTitle>백준 핸들을 연결합니다.</StepTitle>
-                <StepDesc>Solved.ac 계정을 연결하면 최신 풀이 이력을 자동으로 동기화합니다.</StepDesc>
-
-                <Field>
-                  <FieldName>BOJ 핸들</FieldName>
-                  <TextInput
-                    value={bojHandle}
-                    onChange={(event) => setBojHandle(event.target.value)}
-                    placeholder="예) reloop_dev"
-                    maxLength={20}
-                  />
-                  <FieldHint>영문/숫자/-/_ 3~20자. 동기화 시 정확하게 입력해 주세요.</FieldHint>
-                </Field>
-
-                <ToggleRow>
-                  <ToggleControl>
-                    <ToggleCheckbox
-                      type="checkbox"
-                      checked={syncAfterSave}
-                      onChange={(event) => setSyncAfterSave(event.target.checked)}
-                    />
-                    <ToggleVisual $active={syncAfterSave}>
-                      <span />
-                    </ToggleVisual>
-                    <ToggleLabel>지금 동기화</ToggleLabel>
-                  </ToggleControl>
-                  <ToggleHint>저장 직후 최근 100문제를 불러옵니다.</ToggleHint>
-                </ToggleRow>
-              </>
            ) : (
              <>
-                <StepTitle>현재는 수학 · PS 트랙을 우선 지원하고 있어요.</StepTitle>
+                <StepTitle>현재는 수학 트랙을 우선 지원하고 있어요.</StepTitle>
                <StepDesc>다른 GoalType은 준비 중입니다. 기본 루틴으로 먼저 시작할 수 있습니다.</StepDesc>
                <PlaceholderCard>
                  <PlaceholderText>
@@ -805,61 +735,6 @@ const SelectionMeta = styled.div`
  font-family: ${theme.font.mono};
 `;

-const ToggleRow = styled.div`
-  margin-top: 8px;
-  display: flex;
-  flex-direction: column;
-  gap: 6px;
-`;
-
-const ToggleControl = styled.label`
-  position: relative;
-  display: inline-flex;
-  align-items: center;
-  gap: 10px;
-  cursor: pointer;
-  user-select: none;
-  width: fit-content;
-`;
-
-const ToggleCheckbox = styled.input`
-  position: absolute;
-  width: 0;
-  height: 0;
-  opacity: 0;
-  pointer-events: none;
-`;
-
-const ToggleVisual = styled.span<{ $active: boolean }>`
-  width: 42px;
-  height: 24px;
-  border-radius: 999px;
-  background: ${({ $active }) => ($active ? theme.color.brandIndigo : 'rgba(255, 255, 255, 0.15)')};
-  padding: 3px;
-  display: inline-flex;
-  align-items: center;
-
-  span {
-    width: 18px;
-    height: 18px;
-    border-radius: 999px;
-    background: #fff;
-    transform: translateX(${({ $active }) => ($active ? '18px' : '0')});
-    transition: transform 0.2s ease;
-  }
-`;
-
-const ToggleLabel = styled.span`
-  color: ${theme.color.textBright};
-  font-weight: 600;
-  font-size: 14px;
-`;
-
-const ToggleHint = styled.span`
-  color: ${theme.color.textSub};
-  font-size: 12px;
-`;
-
 const PlaceholderCard = styled.div`
  border-radius: 18px;
  border: 1px dashed ${theme.color.borderSoftAlpha};
--- a/frontend/src/app/study-logs/[id]/page.tsx
+++ b/frontend/src/app/study-logs/[id]/page.tsx
@@ -14,7 +14,6 @@ import {
 import { Icon } from '@/components/ui/Icon';
 import { Button, Card, Textarea } from '@/components/ui/primitives';
 import {
-  getBojTierLabel,
  getStudyLog,
  resolveUploadUrl,
  updateStudyLog,
@@ -87,9 +86,6 @@ function StudyLogDetailBody() {
  const problemImageUrl = detail ? resolveUploadUrl(problem?.imageUrl ?? problem?.pageImageUrl) : null;
  const passageImageUrl = detail ? resolveUploadUrl(passage?.imageUrl) : null;
  const shortAnswer = isShortAnswerProblem(problem);
-  const psProblem = !problem && detail?.psProblem ? detail.psProblem : null;
-  const psTags = useMemo(() => normalizePsTags(psProblem?.tags ?? null), [psProblem]);
-  const psTierLabel = psProblem ? getBojTierLabel(psProblem.level) : null;

  const saveMemo = async () => {
    if (!detail) return;
@@ -133,17 +129,15 @@ function StudyLogDetailBody() {
        <HeaderTop>
          <div>
            <Eyebrow>
-              {psProblem
-                ? `Solved.ac PS · BOJ ${psProblem.bojId}`
-                : problem
-                  ? `${problem.number}번 · ${problemSet?.year ?? '-'}학년도 ${problemSet?.examType ?? ''} ${problemSet?.subjectName ?? ''}`
-                  : '일반 학습 기록'}
+              {problem
+                ? `${problem.number}번 · ${problemSet?.year ?? '-'}학년도 ${problemSet?.examType ?? ''} ${problemSet?.subjectName ?? ''}`
+                : '일반 학습 기록'}
            </Eyebrow>
            <Title>
-              {psProblem ? psProblem.titleKo ?? psProblem.title : problem?.title ?? '문제 정보가 없는 학습 기록'}
+              {problem?.title ?? '문제 정보가 없는 학습 기록'}
            </Title>
            <MetaLine>
-              {(psProblem ? detail.subject.name : problemSet?.title ?? detail.subject.name) ?? detail.subject.name}
+              {(problemSet?.title ?? detail.subject.name) ?? detail.subject.name}
              {detail.tag ? ` · ${detail.tag.name}` : ''}
            </MetaLine>
          </div>
@@ -161,34 +155,8 @@ function StudyLogDetailBody() {
      <ContentGrid>
        <MainColumn>
          <SectionCard>
-            <SectionTitle>{psProblem ? 'PS 문제' : '문제 보기'}</SectionTitle>
-            {psProblem ? (
-              <PsProblemPreview>
-                <PsBadgeRow>
-                  <PsTypeBadge>PS</PsTypeBadge>
-                  {psTierLabel ? (
-                    <TierBadge $tierColor={getTierColor(psProblem.level)}>{psTierLabel}</TierBadge>
-                  ) : null}
-                </PsBadgeRow>
-                <PsMeta>백준 BOJ {psProblem.bojId}</PsMeta>
-                {psTags ? (
-                  <PsTagList>
-                    {psTags.map((tag) => (
-                      <PsTag key={tag.key}>{tag.displayName}</PsTag>
-                    ))}
-                  </PsTagList>
-                ) : null}
-                <PsNotice>
-                  이 문제는 Solved.ac 에서 가져온 PS 문항입니다. 문제 본문은 백준 사이트에서 확인하세요.
-                </PsNotice>
-                <Link href={psProblem.bojUrl} target="_blank" rel="noreferrer">
-                  <ExternalLinkButton as="span" $variant="secondary">
-                    백준에서 보기
-                    <Icon name="arrow-right" size={16} />
-                  </ExternalLinkButton>
-                </Link>
-              </PsProblemPreview>
-            ) : (
+            <SectionTitle>문제 보기</SectionTitle>
+            {problem ? (
              <>
                {passage && (
                  <PassageBlock
@@ -200,11 +168,13 @@ function StudyLogDetailBody() {
                )}
                <ProblemStage
                  imageUrl={problemImageUrl}
-                  alt={`${problemSet?.subjectName ?? detail.subject.name} ${problem?.number ?? ''}번`}
+                  alt={`${problemSet?.subjectName ?? detail.subject.name} ${problem.number}번`}
                />
              </>
+            ) : (
+              <NoProblemNotice>문제 정보가 없습니다.</NoProblemNotice>
            )}
-            {!psProblem && (detail.chosenAnswer !== null || problem?.answerNumber !== null) ? (
+            {(detail.chosenAnswer !== null || problem?.answerNumber !== null) ? (
              <ChoiceList>
                {shortAnswer ? (
                  <AnswerSummary>
@@ -617,63 +587,8 @@ const StateCard = styled(Card)`
  border-radius: 18px;
 `;

-const PsProblemPreview = styled.div`
-  display: flex;
-  flex-direction: column;
-  gap: 12px;
-`;
-
-const PsBadgeRow = styled.div`
-  display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: 8px;
-`;
-
-const PsTypeBadge = styled.span`
-  padding: 4px 10px;
-  border-radius: 999px;
-  background: rgba(248, 113, 113, 0.12);
-  border: 1px solid rgba(248, 113, 113, 0.32);
-  font-size: 12px;
-  font-weight: 700;
-  letter-spacing: 0.08em;
-  color: ${theme.color.textBright};
-`;
-
-const TierBadge = styled.span<{ $tierColor: string }>`
-  padding: 4px 12px;
-  border-radius: 999px;
-  background: ${({ $tierColor }) => `${$tierColor}22`};
-  border: 1px solid ${({ $tierColor }) => `${$tierColor}7a`};
-  font-size: 12px;
-  font-weight: 600;
-  color: ${theme.color.textBright};
-`;
-
-const PsMeta = styled.p`
+const NoProblemNotice = styled.p`
  margin: 0;
-  color: ${theme.color.textSub};
-  font-size: 14px;
-`;
-
-const PsTagList = styled.div`
-  display: flex;
-  flex-wrap: wrap;
-  gap: 8px;
-`;
-
-const PsTag = styled.span`
-  padding: 4px 10px;
-  border-radius: 999px;
-  border: 1px solid rgba(255, 255, 255, 0.1);
-  background: rgba(255, 255, 255, 0.04);
-  font-size: 12px;
-  color: ${theme.color.textBright};
-`;
-
-const PsNotice = styled.p`
-  margin: 8px 0 0;
  padding: 12px;
  border-radius: 14px;
  border: 1px dashed ${theme.color.borderSoftAlpha};
@@ -682,56 +597,3 @@ const PsNotice = styled.p`
  font-size: 13px;
  line-height: 1.4;
 `;
-
-const ExternalLinkButton = styled(Button)`
-  align-self: flex-start;
-  margin-top: 4px;
-`;
-
-type NormalizedPsTag = { key: string; displayName: string };
-
-function normalizePsTags(raw: unknown): NormalizedPsTag[] | null {
-  if (!Array.isArray(raw)) return null;
-  const tags: NormalizedPsTag[] = [];
-  for (const entry of raw) {
-    if (!entry || typeof entry !== 'object') continue;
-    const key = typeof (entry as { key?: unknown }).key === 'string' ? (entry as { key: string }).key : null;
-    if (!key) continue;
-    const asAny = entry as { displayName?: unknown; displayNames?: unknown };
-    const displayName =
-      (typeof asAny.displayName === 'string' && asAny.displayName) ||
-      pickPreferredDisplayName(asAny.displayNames) ||
-      key;
-    tags.push({ key, displayName });
-  }
-  return tags.length > 0 ? tags : null;
-}
-
-function pickPreferredDisplayName(raw: unknown): string | null {
-  if (!Array.isArray(raw)) return null;
-  let fallback: string | null = null;
-  for (const entry of raw) {
-    if (!entry || typeof entry !== 'object') continue;
-    const name = typeof (entry as { name?: unknown }).name === 'string' ? (entry as { name: string }).name : null;
-    if (!name) continue;
-    const language =
-      typeof (entry as { language?: unknown }).language === 'string'
-        ? (entry as { language: string }).language.toLowerCase()
-        : null;
-    if (language === 'ko') {
-      return name;
-    }
-    if (!fallback) {
-      fallback = name;
-    }
-  }
-  return fallback;
-}
-
-const TIER_COLORS = ['#cd7f32', '#b0bec5', '#fbbf24', '#38bdf8', '#60a5fa', '#f472b6'];
-
-function getTierColor(level: number) {
-  if (!level || level <= 0) return theme.color.border;
-  const tierIndex = Math.min(TIER_COLORS.length - 1, Math.max(0, Math.floor((level - 1) / 5)));
-  return TIER_COLORS[tierIndex] ?? theme.color.brandIndigo;
-}
--- a/frontend/src/app/study/history/page.tsx
+++ b/frontend/src/app/study/history/page.tsx
@@ -7,7 +7,7 @@ import AppShell from '@/components/layout/AppShell';
 import DatePicker from '@/components/ui/DatePicker';
 import { Icon } from '@/components/ui/Icon';
 import Select from '@/components/ui/Select';
-import { api, getBojTierLabel, type StudyLog, type StudyResult, type Subject } from '@/lib/api';
+import { api, type StudyLog, type StudyResult, type Subject } from '@/lib/api';
 import { theme } from '@/styles/theme';

 const PAGE_SIZE = 20;
@@ -309,7 +309,6 @@ function HistoryBody() {
                      <RowLink href={`/study-logs/${log.id}`}>
                        <ItemTitleGroup>
                          <ItemTitle>{log.title}</ItemTitle>
-                          {renderPsBadges(log.psProblem)}
                        </ItemTitleGroup>
                        <ItemMeta>
                          {log.subject?.name ?? '과목 미지정'}
@@ -363,7 +362,6 @@ function HistoryBody() {
                  <MobileCardTop>
                    <MobileTitleStack>
                      <MobileItemTitle>{log.title}</MobileItemTitle>
-                      {renderPsBadges(log.psProblem)}
                    </MobileTitleStack>
                    <ResultChip $result={log.result}>
                      <Icon name={resultIcon(log.result)} size={14} weight="bold" />
@@ -532,18 +530,6 @@ function getVisiblePages(
  return [1, 'ellipsis', currentPage - 1, currentPage, currentPage + 1, 'ellipsis', totalPages];
 }

-function renderPsBadges(psProblem: StudyLog['psProblem'] | null | undefined) {
-  if (!psProblem) return null;
-  const tierLabel = getBojTierLabel(psProblem.level);
-  const tierColor = getTierColor(psProblem.level);
-  return (
-    <PsBadgeRow>
-      <PsBadge>PS</PsBadge>
-      <PsTierBadge $tierColor={tierColor}>{tierLabel}</PsTierBadge>
-    </PsBadgeRow>
-  );
-}
-
 function resultLabel(result: StudyResult): string {
  if (result === 'correct') return '맞음';
  if (result === 'partial') return '부분';
@@ -614,14 +600,6 @@ function formatDuration(seconds: number | null): string {
  return `${minutes}m ${remainSeconds}s`;
 }

-const TIER_COLORS = ['#cd7f32', '#b0bec5', '#fbbf24', '#38bdf8', '#60a5fa', '#f472b6'];
-
-function getTierColor(level: number) {
-  if (!level || level <= 0) return theme.color.border;
-  const tierIndex = Math.min(TIER_COLORS.length - 1, Math.max(0, Math.floor((level - 1) / 5)));
-  return TIER_COLORS[tierIndex] ?? theme.color.brandIndigo;
-}
-
 const PageWrap = styled.div`
  display: flex;
  flex-direction: column;
@@ -1005,34 +983,6 @@ const TagText = styled.span`
  font-size: 13px;
 `;

-const PsBadgeRow = styled.div`
-  display: inline-flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: 6px;
-`;
-
-const PsBadge = styled.span`
-  padding: 2px 8px;
-  border-radius: 999px;
-  background: rgba(248, 113, 113, 0.16);
-  border: 1px solid rgba(248, 113, 113, 0.32);
-  font-size: 11px;
-  font-weight: 700;
-  letter-spacing: 0.08em;
-  color: ${theme.color.textBright};
-`;
-
-const PsTierBadge = styled.span<{ $tierColor: string }>`
-  padding: 2px 8px;
-  border-radius: 999px;
-  background: ${({ $tierColor }) => `${$tierColor}22`};
-  border: 1px solid ${({ $tierColor }) => `${$tierColor}6a`};
-  font-size: 11px;
-  font-weight: 600;
-  color: ${theme.color.textBright};
-`;
-
 const DatePrimary = styled.div`
  color: ${theme.color.textMain};
  font-size: 13px;
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -40,7 +40,7 @@ export type StudyResult = 'correct' | 'incorrect' | 'partial';
 export type ReviewStatus = 'pending' | 'done' | 'skipped' | 'expired';
 export type SubscriptionTier = 'free' | 'pro' | 'school';
 export type OrganizationRole = 'admin' | 'teacher' | 'student';
-export type GoalType = 'math-suneung' | 'ps' | 'certificate' | 'language' | 'none';
+export type GoalType = 'math-suneung' | 'certificate' | 'language' | 'none';
 export type MathUnit = 'common' | 'prob_stat' | 'calculus' | 'geometry';

 export const MATH_UNIT_LABEL: Record<MathUnit, string> = {
@@ -299,13 +299,6 @@ export interface StudyLog {
  timeSpent: number | null;
  subject?: { id: number; name: string; color: string };
  tag?: { id: number; name: string } | null;
-  psProblem?: {
-    bojId: number;
-    title: string;
-    titleKo: string | null;
-    level: number;
-    tags: unknown;
-  } | null;
  reviewSchedules?: Array<{
    id: number;
    scheduledAt: string;
@@ -328,14 +321,6 @@ export interface StudyLogDetail {
  baseCorrectRate: number | null;
  subject: { id: number; name: string; color: string };
  tag: { id: number; name: string } | null;
-  psProblem: {
-    bojId: number;
-    title: string;
-    titleKo: string | null;
-    level: number;
-    tags: unknown;
-    bojUrl: string;
-  } | null;
  problem: {
    id: number;
    number: number;
@@ -734,14 +719,3 @@ export async function getReviewDay(date: string): Promise<DayResponse> {
  return response.data;
 }

-// ─── BOJ Tier ──────────────────────────────────────────────────────────────
-
-const BOJ_TIER_NAMES = ['Bronze', 'Silver', 'Gold', 'Platinum', 'Diamond', 'Ruby'] as const;
-const BOJ_TIER_DIVISIONS = ['V', 'IV', 'III', 'II', 'I'] as const;
-
-export function getBojTierLabel(level: number) {
-  if (!level || level <= 0) return 'Unrated';
-  const tierIndex = Math.min(BOJ_TIER_NAMES.length - 1, Math.max(0, Math.floor((level - 1) / 5)));
-  const divisionIndex = Math.max(0, (level - 1) % 5);
-  return `${BOJ_TIER_NAMES[tierIndex]} ${BOJ_TIER_DIVISIONS[divisionIndex]}`;
-}