feat: generate 以 board_select 为唯一列表主人并写回 shown keys

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

tests/test_board_history.py

@@ -60,6 +60,33 @@ class ShownKeysTests(unittest.TestCase):
         )
         self.assertEqual(merged["wecom_shown_keys"]["github_trending"], ["shown/one"])
 
+    def test_persist_shown_keys_differs_from_baseline_keys(self):
+        from daily.board_select import board_select
+
+        raw = [{"repo": f"o/r{i}"} for i in range(10)]
+        recent = {f"o/r{i}" for i in range(3)}
+        selected = board_select(
+            board="github_trending",
+            items=raw,
+            recent_keys=recent,
+            limit=5,
+            pool_size=50,
+            kind="github",
+        )
+        baseline_keys = [x["repo"] for x in raw[:5]]
+        shown = extract_shown_keys("github_trending", selected)
+        data = {
+            "movement_baseline": {
+                "github_trending": [{"repo": k} for k in baseline_keys],
+            },
+        }
+        merged = merge_wecom_shown_into_data(data, {"github_trending": shown})
+        self.assertNotEqual(
+            set(merged["wecom_shown_keys"]["github_trending"]),
+            {x["repo"] for x in merged["movement_baseline"]["github_trending"]},
+        )
+        self.assertEqual(shown, ["o/r3", "o/r4", "o/r5", "o/r6", "o/r7"])
+
 
 if __name__ == "__main__":
     unittest.main()