refactor: 缠论引擎包化与 Web 分层（ECR-001）

将根目录引擎迁入 chanlun/ 并保留兼容 shim；拆分 TF_DF 与 web 服务；
前端模块化；strategies 改用 chanlun 导入；补充 ESS 文档与 golden 回归。

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

web/templates/chan_tv.html

@@ -147,9 +147,10 @@
   <!-- TV charting library -->
   <script src="/charting_library/charting_library.js"></script>
   <!-- 自定义模块 -->
-  <script src="/static/js/chan_engine.js?v=3"></script>
-  <script src="/static/js/tv_datafeed.js?v=5"></script>
-  <script src="/static/js/chan_indicator.js?v=9"></script>
+  <script src="/static/js/app/api_client.js?v=1"></script>
+  <script src="/static/js/app/chan_engine.js?v=4"></script>
+  <script src="/static/js/app/datafeed.js?v=6"></script>
+  <script src="/static/js/app/chan_indicator.js?v=10"></script>
 
   <script>
   (function () {