chore: commit pre-existing untracked work + finish archived-doc notes

Commits work that predated this session and was sitting untracked:
qualitative sell strategy module (src/quant_engine), the t20 outcome
ledger cron workflow, the QuantEngine masterpiece roadmap doc, a WBS
execution yaml, and shared Razor Pages partials (page header, delete
confirm modal) with their view models. Verified these build clean
(0 errors, 0 warnings) before committing.

Also includes the "ARCHIVED" header notes on 6 docs archived in the
previous commit - the git-mv landed there, but the note text itself
was missed from that commit's staged file list.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/WBS_EXECUTION_20260728.yaml

@@ -0,0 +1,40 @@
+version: "1.0.0"
+objective: "oms-wms-erp의 계약 중심 리팩토링을 안전한 증분 단위로 수행"
+scope:
+  canonical_code_root: "oms-wms-erp"
+  excluded_roots:
+    - "src/frontend"
+    - "Temp"
+    - "archive"
+work_items:
+  - id: "WBS-20260728-01"
+    title: "baseline 및 계약 경계 확인"
+    status: "in_progress"
+    success_data:
+      - "npm run type-check exit code 0"
+      - "npm run build exit code 0"
+      - "npm run test exit code 0"
+      - "python tools/validate_enterprise_crud_specification_v1.py exit code 0"
+  - id: "WBS-20260728-02"
+    title: "공통 계약·타입·오류 처리의 단일 진실원 확립"
+    status: "pending"
+    success_data:
+      - "중복 API 오류·감사·그리드 계약 0건"
+      - "기존 소비자 타입체크 통과"
+  - id: "WBS-20260728-03"
+    title: "삭제·동시성·금액 정합성 보호"
+    status: "pending"
+    success_data:
+      - "물리 삭제 경로 신규 추가 0건"
+      - "낙관적 잠금 실패가 명시적 오류 계약으로 매핑"
+      - "금액 계산의 부동소수점 암묵 변환 0건"
+  - id: "WBS-20260728-04"
+    title: "사후 검증·재현성·증빙 기록"
+    status: "pending"
+    success_data:
+      - "검증 명령과 결과가 Temp/ 증빙 파일에 존재"
+      - "변경 파일이 WBS 항목에 매핑됨"
+constraints:
+  - "가격·수량·공식은 quant-engine spec을 재계산하지 않음"
+  - "Temp/ 산출물은 직접 편집하지 않음"
+  - "기존 사용자 변경을 덮어쓰지 않음"