refactor: ECR-002 拆分 runtime 包并加深 analyze 契约（已审）

将 web/services/runtime.py 拆为 runtime/ 子模块并保持门面兼容；补齐 ESS 文档、门面/契约/TF_DF 测试与 CODE_REVIEW Approve。

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

web/tests/test_runtime_facade.py

@@ -0,0 +1,55 @@
+"""ECR-002：runtime 门面公开符号 + 子模块可导入。"""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+sys.path.insert(0, str(ROOT))
+sys.path.insert(0, str(ROOT / "web"))
+
+REQUIRED = [
+    "get_kl_data",
+    "analyze_chan",
+    "add_indicators",
+    "serialize_chan_macd_data",
+    "clean_dataframe_for_json",
+    "classify_trend_stage",
+    "refresh_data_service_metadata",
+    "TIMEFRAMES",
+    "SYMBOLS",
+    "_zone_cache",
+    "macd_fast_period",
+    "is_smaller_or_equal_timeframe",
+    "get_uncompleted_seg_list",
+]
+
+
+def test_runtime_facade_exports():
+    from services import runtime as R
+
+    for name in REQUIRED:
+        assert hasattr(R, name), f"missing facade export: {name}"
+
+
+def test_runtime_submodules_importable():
+    from services.runtime import state, timeframes, market_data, indicators, analyze, serialize
+
+    assert state.exchange is not None
+    assert callable(timeframes.timeframe_to_minutes)
+    assert callable(market_data.get_kl_data)
+    assert callable(indicators.add_indicators)
+    assert callable(analyze.analyze_chan)
+    assert callable(serialize.convert_direction)
+
+
+def test_thin_shims_still_reexport():
+    from services import market_data as md
+    from services import chan_analyze as ca
+    from services import serializers as ser
+    from services import timeframes as tf
+
+    assert callable(md.get_kl_data)
+    assert callable(ca.analyze_chan)
+    assert callable(ser.serialize_chan_macd_data)
+    assert callable(tf.timeframe_to_minutes)