fix(trend): align hub and four-exchange trend plan display

Unify gate_bot with shared enrich_trend_plan for strategy pages and hub monitor, reconcile DCA avg with live entry price, and fix missing fill price display.

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

tests/test_trend_dca_enrich_fills.py

@@ -62,6 +62,22 @@ 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。"""
+        plan = self._base_plan(
+            legs_done=2,
+            avg_entry_price=0.3507,
+            order_amount_open=161,
+            leg_fill_prices_json=json.dumps([0.3436]),
+            grid_prices_json=json.dumps([0.343, 0.343, 0.3395, 0.336, 0.3325]),
+        )
+        enriched = attach_trend_dca_levels(plan)
+        levels = enriched["dca_levels"]
+        dca2 = levels[2]
+        self.assertEqual(dca2["status"], "done")
+        self.assertAlmostEqual(dca2["avg_entry"], 0.3507, places=4)
+        self.assertGreater(dca2["price"], 0.343)
+
 
 if __name__ == "__main__":
     unittest.main()