Show pure-option source and net PnL on dashboard.

Restore 纯期权 label for non-hedge option rows and use close-preview net PnL instead of exchange upl.

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

tests/test_dashboard_position_source.py

@@ -51,8 +51,9 @@ class TestDashboardPositionSource(unittest.TestCase):
             "顺势加仓",
         )
 
-    def test_options_plain_is_dash(self):
-        self.assertEqual(_options_source_label({"source": "option", "source_label": "纯期权"}), "—")
+    def test_options_plain_is_pure(self):
+        self.assertEqual(_options_source_label({"source": "option", "source_label": "纯期权"}), "纯期权")
+        self.assertEqual(_options_source_label({"source": "option"}), "纯期权")
         self.assertEqual(
             _options_source_label({"source": "options_options", "source_label": "期期对冲"}),
             "期期对冲",