feat: implement education activity phase 1 MVP in course detail

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Target Base

• 399-feature-altsis-next-project-update-to-v20

Summary

• Implemented Phase 1 Activity domain on top of existing Alt Board/AltForm/AltSheet execution engine, scoped under Syllabus.
• Added/connected backend Activity stack:
  • Models: Activity, ActivityTemplate, ActivitySubmission
  • Services: activities, activitySubmissions
  • Controllers/Routes: activities, activityTemplates
  • Router mounting in /api/activities and /api/activity-templates
  • Season.permissionActivityV2 + registration permission synchronization path
  • CalendarEvent support for sourceType: "activity" and due-date sync
  • Built-in template definitions/seeding for assignment(과제), quiz(퀴즈), discussion(토론)
• Added/connected frontend Activity Phase 1 UX in course detail:
  • useAPIv2.ts Activity/Template APIs
  • types/activity.ts
  • Course Activity UI set (ActivityList, ActivityCreatePopup, ActivityDetail, ActivityTemplateList, ActivityTemplateEditor, ActivityTab)
  • Mentoring + Enrolled 탭에서 활동 탭 연결
  • Seasons permission UI에서 activity 권한 노출
  • AltFormRenderer/AltSheetView 기반 제출/피드백 흐름 연결
• Fixed branch-blocking backend integrity issues found during validation:
  • duplicate route imports/registrations in backend/src/routes/index.js
  • duplicate permissionActivityV2 declarations/switch branches in season/registration model+service/controller paths

Test Plan

• rg --files "backend/src" -g '*.js' | xargs -n 1 node --check ✅
• yarn build in frontend ✅ (build completes; existing lint warnings remain)
• yarn test in backend ⚠️ blocked by existing Jest config path issues unrelated to this feature set:
  • setupFiles expects ./env.js while env loader lives at src/env.js
  • moduleNameMapper targets <rootDir>/models and <rootDir>/controllers while source code is under src/

Known Limitations

• Phase 1 intentionally excludes Phase 2+ items:
  • enrollment evaluation bridge
  • timeline/student todo dashboard
  • AI tutor integration
  • block-canvas editor

  

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Automation update:

• Phase 1 교육활동(Activity) 구현 체크리스트(backend/frontend) 반영 상태를 확인했고, 브랜치 안정성 저해 이슈를 함께 정리했습니다.
• 추가 수정: permissionActivityV2 관련 중복 선언/중복 분기, routes/index.js의 중복 라우터 등록을 제거하여 backend 구문/런타임 리스크를 해소했습니다.
• 검증 결과:
  • backend/src 전체 node --check 통과
  • frontend yarn build 통과 (기존 경고 다수 존재)
  • backend yarn test는 기존 Jest 설정 경로 불일치(./env.js, moduleNameMapper)로 실행 차단됨

참고: 자동화 PR 생성기가 현재 head branch 정책을 강제해 본 PR의 base가 feature/activity-system으로 생성되었습니다. 요청된 base(399-feature-altsis-next-project-update-to-v20)와 다르므로 retarget이 필요합니다.

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_{Sent by Cursor Automation: ALTSIS Activity System Phase 1}