feat(hub): exchange price precision, entry price, and trend DCA display

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

tests/test_hub_agent_entry_price.py

@@ -0,0 +1,32 @@
+"""子代理持仓：四所开仓价字段统一解析。"""
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "manual_trading_hub"))
+
+from agent import _position_entry_price  # noqa: E402
+
+
+class TestHubAgentEntryPrice(unittest.TestCase):
+    def test_binance_entry_price(self):
+        px = _position_entry_price({"entryPrice": 65851.6, "info": {}})
+        self.assertAlmostEqual(px, 65851.6)
+
+    def test_okx_avg_px(self):
+        px = _position_entry_price({"info": {"avgPx": "72.731"}})
+        self.assertAlmostEqual(px, 72.731)
+
+    def test_gate_info_entry(self):
+        px = _position_entry_price({"info": {"entry_price": "0.2232"}})
+        self.assertAlmostEqual(px, 0.2232)
+
+    def test_missing_returns_none(self):
+        self.assertIsNone(_position_entry_price({"info": {}}))
+
+
+if __name__ == "__main__":
+    unittest.main()