feat(growth): same-day 1-day baselines for new videos

Let 1-day view growth use a zero baseline for videos published today, and the first successful sample for older videos ingested today, without mixing those into 7/30-day rankings.

tests/test_repository.py

@@ -296,6 +296,59 @@ def test_pending_snapshot_aids():
             db.close()
 
 
+def test_upsert_snapshot_preserves_view_open():
+    with tempfile.TemporaryDirectory() as tmp:
+        db, repo = setup(tmp)
+        try:
+            metrics = {
+                "view": 10, "like": 1, "favorite": 0, "coin": 0,
+                "share": 0, "reply": 0, "danmaku": 0,
+            }
+            repo.upsert_snapshot(
+                "2026-10-31", 1, metrics=metrics, ok=True, err=None, captured_at=10,
+            )
+            first = repo.get_snapshot("2026-10-31", 1)
+            assert first["view"] == 10
+            assert first["view_open"] == 10
+            assert first["open_captured_at"] == 10
+
+            metrics["view"] = 40
+            repo.upsert_snapshot(
+                "2026-10-31", 1, metrics=metrics, ok=True, err=None, captured_at=20,
+            )
+            second = repo.get_snapshot("2026-10-31", 1)
+            assert second["view"] == 40
+            assert second["view_open"] == 10
+            assert second["open_captured_at"] == 10
+            assert second["captured_at"] == 20
+
+            repo.upsert_snapshot(
+                "2026-10-31", 2, metrics=None, ok=False, err="x", captured_at=1,
+            )
+            failed = repo.get_snapshot("2026-10-31", 2)
+            assert failed["view_open"] is None
+            metrics["view"] = 7
+            repo.upsert_snapshot(
+                "2026-10-31", 2, metrics=metrics, ok=True, err=None, captured_at=5,
+            )
+            recovered = repo.get_snapshot("2026-10-31", 2)
+            assert recovered["view"] == 7
+            assert recovered["view_open"] == 7
+            assert recovered["open_captured_at"] == 5
+
+            copied = repo.copy_ok_snapshots(
+                "2026-10-31", "2026-11-01", captured_at=30, src="seed",
+            )
+            assert copied == 2
+            seeded = repo.get_snapshot("2026-11-01", 1)
+            assert seeded["view"] == 40
+            assert seeded["view_open"] == 40
+            assert seeded["open_captured_at"] == 30
+            assert seeded["src"] == "seed"
+        finally:
+            db.close()
+
+
 def test_up_follower_snapshot_and_backfill():
     with tempfile.TemporaryDirectory() as tmp:
         db, repo = setup(tmp)
@@ -367,6 +420,7 @@ def main():
     test_primary_folder_is_order_independent()
     test_dropped_invalid_preserves_original_title()
     test_pending_snapshot_aids()
+    test_upsert_snapshot_preserves_view_open()
     test_up_follower_snapshot_and_backfill()
     print("OK: 收藏夹/视频状态机与黑名单测试全部通过")