fix(growth): require a 1000-view baseline on the rate board

Keep small-base videos on the delta board only, and raise the smoothing prior to 1000 so videos that just clear the floor do not dominate the ranking.

tests/test_config.py

@@ -146,7 +146,7 @@ def test_analytics_defaults_and_validation():
         assert cfg.analytics.video_shrink_minutes == 60
         assert cfg.analytics.shrink_minutes is None
         assert cfg.analytics.home_growth_days == "auto"
-        assert cfg.analytics.growth_rate_prior == 500
+        assert cfg.analytics.growth_rate_prior == 1000
         assert cfg.schedule.recent_snapshot_minutes == 60
         assert cfg.schedule.recent_video_days == 2
         assert cfg.schedule.snapshot_at == "23:15"
@@ -160,7 +160,7 @@ def test_analytics_defaults_and_validation():
             "video_shrink_minutes": 30,
             "shrink_minutes": 90,
             "home_growth_days": 1,
-            "growth_rate_prior": 1000,
+            "growth_rate_prior": 2000,
         }
         data["schedule"] = {
             "discover_minutes": 30,
@@ -178,7 +178,7 @@ def test_analytics_defaults_and_validation():
         assert cfg.analytics.video_shrink_minutes == 30
         assert cfg.analytics.shrink_minutes == 90
         assert cfg.analytics.home_growth_days == 1
-        assert cfg.analytics.growth_rate_prior == 1000
+        assert cfg.analytics.growth_rate_prior == 2000
         assert cfg.schedule.recent_snapshot_minutes == 15
         assert cfg.schedule.recent_video_days == 3
 

tests/test_web_queries.py

@@ -492,7 +492,7 @@ def test_about_payload():
                 "video_shrink_minutes": 60,
                 "shrink_minutes": None,
                 "home_growth_days": "auto",
-                "growth_rate_prior": 500,
+                "growth_rate_prior": 1000,
             }
             assert about["heat_weights"]["view"] == 0.30
             assert about["followers"]["videos_total"] == 3
@@ -758,8 +758,8 @@ def test_same_day_growth_baselines():
 
             rate = q.list_videos(sort="growth_rate", growth_days=1, page_size=20)
             rate_aids = {item["aid"] for item in rate["items"]}
-            assert 103 not in rate_aids
-            assert 101 in rate_aids and 105 in rate_aids
+            assert 103 not in rate_aids and 105 not in rate_aids
+            assert 101 in rate_aids
 
             seven = q.list_videos(sort="growth", growth_days=7)
             seven_aids = {item["aid"] for item in seven["items"]}
@@ -782,7 +782,7 @@ def test_same_day_growth_baselines():
 
 
 def test_growth_rate_sort_uses_prior():
-    """小基数的真实增速可以更高，排序分用基线 + prior，不按 raw rate 排。"""
+    """基线不足 1000 不进增速榜；达标后按基线 + prior 排序，不按 raw rate。"""
     with tempfile.TemporaryDirectory() as tmp:
         db, q = setup(tmp)
         try:
@@ -791,7 +791,9 @@ def test_growth_rate_sort_uses_prior():
             previous_day = DATES[-2]
             start = int(day_bounds(latest)[0])
             pub = int(day_bounds("2026-09-01")[0])
-            for aid, views in ((301, (80, 512)), (302, (2000, 4000))):
+            # 301：80→512，真实 +540%，基线低于 1000，只留在增量榜。
+            # 304：1000→2500，真实增速高于 302，平滑后应排在 302 后面。
+            for aid, views in ((301, (80, 512)), (302, (5000, 10000)), (304, (1000, 2500))):
                 repo.upsert_from_fav(
                     resource(aid, up_mid=1, up_name="UP A", pubdate=pub),
                     FOLDER.media_id, was_added=True, now=start,
@@ -807,11 +809,16 @@ def test_growth_rate_sort_uses_prior():
             DASHBOARD_CACHE.clear()
             ranked = q.list_videos(sort="growth_rate", growth_days=1, page_size=20)
             order = [item["aid"] for item in ranked["items"]]
-            assert ranked["growth_rate_prior"] == 500
-            assert order.index(302) < order.index(301)
-            small = next(item for item in ranked["items"] if item["aid"] == 301)
-            assert abs(small["growth"]["rate"] - 432 / 80) < 1e-12
-            assert small["growth"]["delta"] == 432
+            assert ranked["growth_rate_prior"] == 1000
+            assert 301 not in order
+            assert order.index(302) < order.index(304)
+            modest = next(item for item in ranked["items"] if item["aid"] == 304)
+            assert abs(modest["growth"]["rate"] - 1500 / 1000) < 1e-12
+
+            growth = q.list_videos(sort="growth", growth_days=1, page_size=20)
+            grown = next(item for item in growth["items"] if item["aid"] == 301)
+            assert grown["growth"]["delta"] == 432
+            assert abs(grown["growth"]["rate"] - 432 / 80) < 1e-12
         finally:
             db.close()