feat: 实现 Skills 跨榜去重与首日 baseline 模式判定

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

tests/test_wecom_delta.py

@@ -59,3 +59,44 @@ class NewsPushedLinksTests(unittest.TestCase):
                     out = filter_unpushed_items(items, date_str="2026-07-09")
             self.assertEqual(len(out), 1)
             self.assertEqual(out[0]["link"], "https://example.com/b")
+
+
+class SkillMovePartitionTests(unittest.TestCase):
+    def test_partition_dedupes_across_boards(self):
+        trending = [
+            {
+                "id": "a/b/foo",
+                "rank": 4,
+                "title": "foo",
+                "source": "a/b",
+                "installs": 1,
+                "link": "",
+                "description": "",
+            }
+        ]
+        hot = [
+            {
+                "id": "a/b/foo",
+                "rank": 2,
+                "title": "foo",
+                "source": "a/b",
+                "installs": 1,
+                "link": "",
+                "description": "",
+            }
+        ]
+        from daily.delta import partition_skill_moves_for_wecom
+
+        t_out, h_out = partition_skill_moves_for_wecom(trending, hot)
+        self.assertEqual(len(t_out), 1)
+        self.assertEqual(len(h_out), 0)
+        self.assertIn("Trending #4", t_out[0]["badge"])
+        self.assertIn("Hot #2", t_out[0]["badge"])
+
+    def test_effective_mode_fallback_full_without_baseline(self):
+        from daily.delta import effective_wecom_mode
+
+        with patch("daily.delta.find_previous_data", return_value=None):
+            with patch("daily.delta.wecom_mode", return_value="delta"):
+                with patch("daily.delta.delta_baseline_fallback", return_value="full"):
+                    self.assertEqual(effective_wecom_mode(date_str="2026-07-10"), "full")