Auto-fill journal direction from trade records.

Add a required direction field on the review form, persist it, and set long/short when clicking 填入复盘.

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

tests/test_journal_form_lib.py

@@ -5,6 +5,7 @@ import unittest
 
 from lib.instance.journal_form_lib import (
     journal_entry_reason_valid,
+    normalize_journal_direction,
     normalize_journal_entry_reason,
 )
 from lib.strategy.strategy_trade_labels import (
@@ -58,6 +59,13 @@ class JournalFormLibTests(unittest.TestCase):
         self.assertTrue(journal_entry_reason_valid("顺势/大分歧A", opts))
         self.assertFalse(journal_entry_reason_valid("趋势单", opts))
 
+    def test_normalize_journal_direction(self):
+        self.assertEqual(normalize_journal_direction("short"), "short")
+        self.assertEqual(normalize_journal_direction("做空"), "short")
+        self.assertEqual(normalize_journal_direction("long"), "long")
+        self.assertEqual(normalize_journal_direction("做多"), "long")
+        self.assertEqual(normalize_journal_direction(""), "")
+
 
 if __name__ == "__main__":
     unittest.main()