Add month/quarter/half-year/all list window presets with this month as default.

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

tests/test_history_window_lib.py

@@ -0,0 +1,47 @@
+"""history_window_lib 单元测试。"""
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timezone
+from unittest.mock import patch
+
+from lib.common.history_window_lib import (
+    PRESET_ALL,
+    PRESET_DEFAULT,
+    PRESET_UTC_LAST3M,
+    PRESET_UTC_THIS_MONTH,
+    resolve_window,
+)
+
+
+class TestHistoryWindowLib(unittest.TestCase):
+    def test_default_is_this_month(self):
+        self.assertEqual(PRESET_DEFAULT, PRESET_UTC_THIS_MONTH)
+
+    def test_resolve_this_month(self):
+        now = datetime(2026, 7, 8, 12, 0, 0, tzinfo=timezone.utc)
+        with patch("lib.common.history_window_lib.utc_now", return_value=now):
+            win = resolve_window({"win_preset": PRESET_UTC_THIS_MONTH})
+        self.assertEqual(win["preset"], PRESET_UTC_THIS_MONTH)
+        self.assertIn("本月", win["label"])
+        self.assertEqual(win["start_utc"].month, 7)
+        self.assertEqual(win["start_utc"].day, 1)
+
+    def test_resolve_last3m_and_all(self):
+        now = datetime(2026, 7, 8, 12, 0, 0, tzinfo=timezone.utc)
+        with patch("lib.common.history_window_lib.utc_now", return_value=now):
+            w3 = resolve_window({"win_preset": PRESET_UTC_LAST3M})
+            wall = resolve_window({"win_preset": PRESET_ALL})
+        self.assertEqual(w3["label"], "近3月")
+        self.assertEqual(wall["label"], "全部")
+        self.assertLess(wall["start_utc"].year, 2020)
+
+    def test_empty_preset_uses_default_month(self):
+        now = datetime(2026, 7, 8, 12, 0, 0, tzinfo=timezone.utc)
+        with patch("lib.common.history_window_lib.utc_now", return_value=now):
+            win = resolve_window({})
+        self.assertEqual(win["preset"], PRESET_UTC_THIS_MONTH)
+
+
+if __name__ == "__main__":
+    unittest.main()