主图增加笔/线段背驰与面积数字，并修正 SD99999 显示。

三周期分开关控制，只画数字不画图标；线段面积比沿用同向笔面积口径。

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

web/tests/test_analyze_contract.py

@@ -105,6 +105,32 @@ def test_analyze_chan_keys_on_fixture():
         assert k in result["chan_macd"]
 
 
+def test_bi_and_seg_area_div_computed():
+    from services.runtime import add_indicators, analyze_chan
+
+    df = add_indicators(make_ohlcv(400))
+    result = analyze_chan(df, symbol="TEST/USDT:USDT", timeframe="5m")
+    bis = result["bi_list"]
+    segs = result["seg_list"]
+    assert bis, "fixture should produce bi"
+    assert all(hasattr(bi, "macd_div") for bi in bis)
+    assert all(hasattr(seg, "macd_div") for seg in segs)
+    assert all(hasattr(bi, "macd_hist") for bi in bis)
+    assert all(hasattr(seg, "macd_hist") for seg in segs)
+    same_dir_bis = [bi for bi in bis if getattr(bi, "pre", None) and getattr(bi.pre, "pre", None)]
+    if same_dir_bis:
+        bi = same_dir_bis[-1]
+        prev = bi.pre.pre
+        if prev.macd_hist:
+            assert abs(bi.macd_div - (bi.macd_hist / prev.macd_hist)) < 1e-9
+    same_dir_segs = [seg for seg in segs if getattr(seg, "pre", None) and getattr(seg.pre, "pre", None)]
+    if same_dir_segs:
+        seg = same_dir_segs[-1]
+        prev = seg.pre.pre
+        if prev.macd_hist:
+            assert abs(seg.macd_div - (seg.macd_hist / prev.macd_hist)) < 1e-9
+
+
 def test_serialize_chan_macd_shape():
     from pytz import timezone