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>

chanlun/indicators/ChanMACDSeg.py

@@ -0,0 +1,49 @@
+from chanlun.core.ChanEnum import Chan_MACDSEG_DIR
+
+
+class ChanMACDSeg():
+    def __init__(self, index, start_time, start_klu, pre_seg, seg_dir, start_unittf):
+        self.index = index
+        self.start_time = start_time
+        self.end_time = None
+        self.start_klu = start_klu
+        self.end_klu = None
+        self.klu_list = []
+        self.klu_list.append(start_klu)
+        self.unittf_list = []
+        self.seg_dir = seg_dir
+        self.pre = pre_seg
+        self.next = None
+        self.high_klu = start_klu
+        self.low_klu = start_klu
+        self.ref_klu = None
+        self.unittf_list.append(start_unittf)
+    def set_next(self, next_seg):
+        self.next = next_seg
+    def set_pre(self, pre_seg):
+        self.pre = pre_seg
+    def add_klu(self, klu):
+        if klu:
+            self.klu_list.append(klu)
+            klu.set_seg(self)
+            if self.seg_dir == Chan_MACDSEG_DIR.ABOVE:
+                if klu.macdhist > self.high_klu.macdhist:
+                    self.high_klu = klu
+                else:
+                    if klu.macdhist < self.low_klu.macdhist:
+                        self.low_klu = klu
+            else:
+                if klu.macdhist < self.high_klu.macdhist:
+                    self.high_klu = klu
+                else:
+                    if klu.macdhist > self.low_klu.macdhist:
+                        self.low_klu = klu
+            if self.high_klu.index != self.start_klu.index:
+                self.ref_klu = self.high_klu
+    def add_unittf(self, unittf):
+        self.unittf_list.append(unittf)
+        unittf.set_next(self)
+    def set_end_klu(self, end_klu):
+        self.add_klu(end_klu)
+        self.end_klu = end_klu
+        self.end_time = end_klu.time