feat: ECR-003 主站威科夫分析与图表叠层（已审）

独立 wyckoff 引擎 + 按需 include_wyckoff；主站 Lightweight 绘制区间/阶段/事件/VP。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/HANDOFF/ECR-003-engineer-to-reviewer.md

@@ -0,0 +1,27 @@
+# HANDOFF — ECR-003 engineer → reviewer
+
+**Date:** 2026-08-06  
+**From:** engineer  
+**To:** reviewer  
+
+## Summary
+
+主站威科夫 L2：独立分析包 + 按需 API + Lightweight 叠层。
+
+## Artifacts
+
+- IMPL: `docs/IMPLEMENTATION_REPORT/ECR-003.md`
+- TEST: `docs/TEST_REPORT/ECR-003.md`
+- SPEC: PRODUCT / ENG `docs/*/ECR-003-wyckoff-main.md`
+- RISK: N/A（展示分析）
+
+## How to verify
+
+```bash
+PYTHONPATH=.:web python -m pytest \
+  tests/test_wyckoff.py \
+  tests/test_golden_pipeline.py \
+  web/tests/test_analyze_contract.py -q
+```
+
+主站勾选「威科夫」→ 区间/阶段/事件/VP 可见。