fix(trend): remove inferred DCA fill prices across all exchanges

Unify display on trend_leg_display_price: use recorded fills or grid triggers only; last done row avg comes from live entry, never back-solve trigger prices.

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

tests/test_trend_dca_enrich_fills.py

@@ -10,7 +10,10 @@ ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(ROOT))
 
 from strategy_snapshot_lib import attach_trend_dca_levels  # noqa: E402
-from strategy_trend_lib import calc_trend_plan_money_metrics  # noqa: E402
+from strategy_trend_lib import (  # noqa: E402
+    calc_trend_plan_money_metrics,
+    trend_leg_display_price,
+)
 
 
 class TestTrendDcaEnrichFills(unittest.TestCase):
@@ -62,8 +65,8 @@ class TestTrendDcaEnrichFills(unittest.TestCase):
         self.assertEqual(dca2["status"], "pending")
         self.assertAlmostEqual(dca2["price"], 0.343, places=4)
 
-    def test_missing_dca_fills_align_last_avg_with_header(self):
-        """缺补仓成交价时，末档加仓后均价应对齐计划头部 avg_entry_price。"""
+    def test_missing_dca_fills_use_grid_trigger_not_inferred_price(self):
+        """缺补仓成交价时：触发价用计划网格，末档均价对齐头部，禁止反推离谱成交价。"""
         plan = self._base_plan(
             legs_done=2,
             avg_entry_price=0.3507,
@@ -73,10 +76,25 @@ class TestTrendDcaEnrichFills(unittest.TestCase):
         )
         enriched = attach_trend_dca_levels(plan)
         levels = enriched["dca_levels"]
+        dca1 = levels[1]
         dca2 = levels[2]
+        self.assertEqual(dca1["status"], "done")
+        self.assertAlmostEqual(dca1["price"], 0.343, places=4)
         self.assertEqual(dca2["status"], "done")
+        self.assertAlmostEqual(dca2["price"], 0.343, places=4)
         self.assertAlmostEqual(dca2["avg_entry"], 0.3507, places=4)
-        self.assertGreater(dca2["price"], 0.343)
+        self.assertLess(dca2["price"], 0.36)
+
+    def test_display_price_never_infers_from_target_avg(self):
+        """四所共用：缺记录时只用网格，不因均价反推离谱触发价。"""
+        plan = self._base_plan(
+            legs_done=2,
+            avg_entry_price=0.3507,
+            leg_fill_prices_json=json.dumps([0.3436]),
+            grid_prices_json=json.dumps([0.343, 0.343, 0.3395, 0.336, 0.3325]),
+        )
+        self.assertAlmostEqual(trend_leg_display_price(plan, 2), 0.343, places=4)
+        self.assertLess(trend_leg_display_price(plan, 2), 0.36)
 
 
 if __name__ == "__main__":

tests/test_trend_hub_enrich_unified.py

@@ -81,7 +81,9 @@ class TestTrendHubEnrichUnified(unittest.TestCase):
         self.assertIn("dca_levels", hub)
         last_done = hub["dca_levels"][2]
         self.assertEqual(last_done["status"], "done")
+        self.assertAlmostEqual(last_done["price"], 0.343, places=4)
         self.assertAlmostEqual(last_done["avg_entry"], 0.3507, places=4)
+        self.assertLess(last_done["price"], 0.36)
         self.assertEqual(hub.get("monitor_source"), "趋势回调计划")
         self.assertEqual(hub.get("add_count"), 2)