Separate chart S/R from gate target ladder

tests/unit/test_backtest_service.py

@@ -942,12 +942,16 @@ def test_window_setups_routes_explicit_range_grid(
 def test_window_setups_routes_full_explicit_target_ladder(monkeypatch):
     captured = {}
 
-    def fake_detector(*args, **kwargs):
-        captured.update(kwargs)
+    def fake_detector(highs, lows, closes):
+        captured.update({
+            "highs": highs,
+            "lows": lows,
+            "closes": closes,
+        })
         return []
 
     monkeypatch.setenv("BACKTEST_SR_VARIANT", bt.EXPLICIT_TARGET_LADDER_VARIANT)
-    monkeypatch.setattr(bt, "detect_sr_levels_legacy", fake_detector)
+    monkeypatch.setattr(bt, "detect_gate_target_ladder", fake_detector)
     records = [
         SimpleNamespace(
             date=date(2024, 1, 1) + timedelta(days=i),
@@ -961,7 +965,11 @@ def test_window_setups_routes_full_explicit_target_ladder(monkeypatch):
     ]
 
     assert bt._window_setups(records, {}, {}) == []
-    assert captured == {"explicit_range_grid": True}
+    assert captured == {
+        "highs": [101.0] * bt.MIN_LOOKBACK,
+        "lows": [99.0] * bt.MIN_LOOKBACK,
+        "closes": [100.0] * bt.MIN_LOOKBACK,
+    }
 
 
 @pytest.mark.parametrize(