Fix TP/SL exit classification when exchange fill slips past the tight band.

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

tests/test_trade_result_lib.py

@@ -1,4 +1,21 @@
-from lib.trade.trade_result_lib import normalize_result_with_pnl, normalize_display_result, is_winning_pnl
+from lib.trade.trade_result_lib import (
+    classify_exit_by_levels,
+    normalize_result_with_pnl,
+    normalize_display_result,
+    is_winning_pnl,
+)
+
+
+def test_classify_short_tp_with_slippage_past_tight_band():
+    # Gate BTC 空单:计划止盈 62600,实际成交约 62738(条件单滑点),旧窄带会误判为外部平仓
+    assert (
+        classify_exit_by_levels("short", 64256.2, 65400, 62600, 62738.0) == "止盈"
+    )
+
+
+def test_classify_long_sl_and_tp_basic():
+    assert classify_exit_by_levels("long", 100, 95, 110, 110.05) == "止盈"
+    assert classify_exit_by_levels("long", 100, 95, 110, 94.9) == "止损"
 
 
 def test_stop_loss_with_profit_becomes_trailing_tp():