Refactor app structure and simplify team docs

incoming-files/served/ledger/README.md

@@ -4,8 +4,8 @@
 
 source-of-truth:
 
-- [frontend/apps/ledger](/home/hyunho/projects/mh-dashboard-organization/.dev-worktree-8081/frontend/apps/ledger)
-- 반영 스크립트: [scripts/publish_ledger_app.sh](/home/hyunho/projects/mh-dashboard-organization/.dev-worktree-8081/scripts/publish_ledger_app.sh)
+- [frontend/apps/ledger](../../../frontend/apps/ledger)
+- 반영 스크립트: [scripts/publish_ledger_app.sh](../../../scripts/publish_ledger_app.sh)
 
 - `index.html`: `/integrations/ledger` 응답 본문
   - `frontend/apps/ledger/index.html` 템플릿에서 publish 시 생성