fix(web): 自动刷新保留 K 线视窗；威科夫与图表增量更新

自动刷新改用 tail update 与 scrollToPosition 恢复视窗，避免 setData 后跳到最右；拆分 chart_tv 模块并扩展 analyze/recent API。同步威科夫分析、pipeline 增量构建及相关策略与配置。

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

chanlun/tests/test_incremental.py

@@ -0,0 +1,141 @@
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+import pandas as pd
+
+_CHAN = Path(__file__).resolve().parents[2]
+if str(_CHAN) not in sys.path:
+	sys.path.insert(0, str(_CHAN))
+
+from chanlun.pipeline.timeframe import TF_DF  # noqa: E402
+
+
+def _zigzag_df(n=160, step=8):
+	dates = pd.date_range("2024-01-01", periods=n, freq="5min")
+	rows = []
+	price = 100.0
+	for i, date in enumerate(dates):
+		up = (i // step) % 2 == 0
+		if up:
+			o = price
+			c = price + 1.5
+			h = c + 0.3
+			l = o - 0.2
+		else:
+			o = price
+			c = price - 1.5
+			h = o + 0.2
+			l = c - 0.3
+		price = c
+		rows.append(
+			{
+				"date": date,
+				"open": o,
+				"high": h,
+				"low": l,
+				"close": c,
+				"volume": 1.0,
+			}
+		)
+	return pd.DataFrame(rows)
+
+
+def _sure_bi_key(bi):
+	return (str(bi.start_time), bi.dir.name, round(float(bi.high), 6), round(float(bi.low), 6))
+
+
+def _zs_key(zs):
+	return (
+		str(zs.start_time),
+		round(float(zs.zg), 6),
+		round(float(zs.zd), 6),
+		len(zs.bi_list),
+	)
+
+
+class TestIncremental(unittest.TestCase):
+	def test_init_stream_matches_batch_push(self):
+		df = _zigzag_df()
+		stream = TF_DF()
+		stream.init_stream(df, 1, "5m")
+
+		batch = TF_DF()
+		indexed = batch.add_indicators(df.copy())
+		klu = batch.cal_kl_data(indexed)
+		klc = []
+		last = None
+		for k in klu:
+			batch._push_klu_into_klc_list(klc, k, last)
+			last = k
+		batch.klc_list = klc
+		batch.rebuild_bi_zs()
+
+		self.assertEqual(len(stream.klu_list), len(klu))
+		self.assertEqual(len(stream.klc_list), len(klc))
+		self.assertEqual(
+			[_sure_bi_key(b) for b in stream.bi_list if b.is_sure],
+			[_sure_bi_key(b) for b in batch.bi_list if b.is_sure],
+		)
+		self.assertEqual(
+			[_zs_key(z) for z in stream.bi_zs_list],
+			[_zs_key(z) for z in batch.bi_zs_list],
+		)
+
+	def test_append_bar_matches_init_stream(self):
+		df = _zigzag_df()
+		stream = TF_DF()
+		stream.init_stream(df, 1, "5m")
+
+		inc = TF_DF()
+		for _, row in df.iterrows():
+			inc.append_bar(row)
+
+		self.assertEqual(len(inc.klu_list), len(stream.klu_list))
+		self.assertEqual(len(inc.klc_list), len(stream.klc_list))
+		self.assertEqual(
+			[_sure_bi_key(b) for b in inc.bi_list if b.is_sure],
+			[_sure_bi_key(b) for b in stream.bi_list if b.is_sure],
+		)
+		self.assertEqual(
+			[_zs_key(z) for z in inc.bi_zs_list],
+			[_zs_key(z) for z in stream.bi_zs_list],
+		)
+
+	def test_replace_last_bar_keeps_count(self):
+		df = _zigzag_df(n=80)
+		tf = TF_DF()
+		tf.init_stream(df, 1, "5m")
+		n_klu = len(tf.klu_list)
+		last = df.iloc[-1].copy()
+		last["close"] = float(last["close"]) + 0.01
+		last["high"] = max(float(last["high"]), float(last["close"]))
+		tf.replace_last_bar(last)
+		self.assertEqual(len(tf.klu_list), n_klu)
+		self.assertGreater(len(tf.klc_list), 0)
+
+	def test_check_fx_skips_forming_right_wing(self):
+		from types import SimpleNamespace
+
+		from chanlun.core.ChanEnum import Chan_FX_TYPE
+
+		tf = TF_DF()
+		pre = SimpleNamespace(high=10, low=8)
+		nxt_open = SimpleNamespace(high=11, low=7, end_klu=None)
+		nxt_done = SimpleNamespace(high=11, low=7, end_klu=object())
+		center = SimpleNamespace(
+			pre=pre,
+			next=nxt_open,
+			high=12,
+			low=9,
+			set_fx=lambda *_a, **_k: None,
+		)
+		self.assertEqual(tf.check_fx(center), Chan_FX_TYPE.UNKNOWN)
+		center.next = nxt_done
+		self.assertEqual(tf.check_fx(center), Chan_FX_TYPE.TOP)
+
+
+if __name__ == "__main__":
+	unittest.main()