Add roll leg avg/TP profit display and reduce instance nav flicker

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

tests/test_strategy_roll_ui_lib.py

@@ -0,0 +1,44 @@
+"""strategy_roll_ui_lib 单元测试。"""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT))
+
+import strategy_roll_ui_lib as roll_ui
+
+
+def test_compute_roll_chain_metrics_short():
+    group = {
+        "id": 1,
+        "direction": "short",
+        "initial_take_profit": 60.0,
+    }
+    legs = [
+        {"id": 10, "leg_index": 1, "amount": 3.0, "fill_price": 65.0, "status": "filled"},
+        {"id": 11, "leg_index": 2, "amount": 5.0, "fill_price": 64.0, "status": "filled"},
+    ]
+    per_leg, group_metrics = roll_ui.compute_roll_chain_metrics(
+        group,
+        legs,
+        qty_live=8.0,
+        entry_live=63.5,
+        monitor={"trigger_price": 66.0, "order_amount": 3.0},
+    )
+    assert per_leg[10]["avg_entry_after"] is not None
+    assert per_leg[11]["avg_entry_after"] is not None
+    assert group_metrics["reward_at_tp_usdt"] is not None
+    assert per_leg[11]["reward_at_tp_usdt"] >= per_leg[10]["reward_at_tp_usdt"]
+
+
+def test_infer_initial_position_from_live():
+    legs = [{"amount": 2.0, "fill_price": 64.0, "status": "filled"}]
+    q0, e0 = roll_ui.infer_initial_position(5.0, 63.0, legs)
+    assert q0 == 3.0
+    assert abs(e0 - 62.3333333333) < 0.001
+
+
+def test_reward_at_tp_long():
+    assert roll_ui.reward_at_tp_usdt("long", 100.0, 110.0, 2.0) == 20.0