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/IMPLEMENTATION_REPORT/ECR-003.md

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+# IMPLEMENTATION_REPORT — ECR-003
+
+**Date:** 2026-08-06  
+**Status:** Implemented  
+**Change Level:** L2  
+
+## What changed
+
+| Area | Change |
+|------|--------|
+| Engine | 新建 `chanlun/analysis/wyckoff/`：交易区间、A–E 阶段、Spring/SOS/LPS/UTAD/SOW/LPSY、区间 VP（POC/VAH/VAL）、量能确认 |
+| API | `/api/analyze` 按需 `include_wyckoff=1` 返回顶层 `wyckoff`；默认可不计算 |
+| Contract | `analyze_contract_keys.json` 扩展为 required + optional_when |
+| UI | 主站「威科夫」及子项开关；Lightweight 绘制区间/阶段/事件/VP |
+| Tests | `tests/test_wyckoff.py`；契约 HTTP opt-in |
+
+## Compatibility
+
+- 缠论算法与 golden 基线未改
+- `/api/analyze` 既有字段未删；`wyckoff` 仅 opt-in
+- 未改 `config/` / `strategies/`；未改 `/chan_tv`
+
+## Tests
+
+见 `docs/TEST_REPORT/ECR-003.md`。
+
+## Follow-ups
+
+- CODE_REVIEW Approve
+- 启发式参数（ATR 容差、lookback）后续可调