feat(classify): super-linear positive weighting by hit count

正向改为按命中次数 n（require_title + reaction + charge + weak）做平方加权，使多信号同现的真 reaction 不被单个负向词打穿（1+1>2、1+1+1>5）；标题不含 require_title 直接 0 分。库内 796 条有效视频复测：线以下误伤由 47 降至 14。

tests/test_classify.py

@@ -68,59 +68,67 @@ def test_date_hits():
     assert date_hits("咻咻满 reaction") == []
 
 
-def test_score_strong_reaction_requires_title():
-    # 强正向 reaction 只在标题含 require_title 时成立。
-    assert score("咻咻满 reaction", duration=60) == 3
-    assert score("咻咻满 反应", duration=60) == 3
+def test_hit_count_is_superlinear():
+    # 正向命中次数 n：require_title + reaction + charge + weak，得分 = n^2
+    # 1 -> 1, 2 -> 4, 3 -> 9（满足 1+1>2、1+1+1>5）
+    assert score("咻咻满", duration=60) == 1
+    assert score("咻咻满 reaction", duration=60) == 4
+    assert score("咻咻满 反应", duration=60) == 4
+    assert score("咻咻满 reaction 充电", duration=60) == 9
+    assert score("咻咻满 reaction 加急充电专场", duration=60) == 25
+    assert score("咻咻满 充电", duration=60) == 4
+    assert score("咻咻满 加急专场", duration=60) == 9
+    assert score("咻咻满 双人", duration=60) == 4
+    assert score("咻咻满 reaction 双人", duration=60) == 9
+
+
+def test_reaction_requires_title():
+    # 标题不含 require_title 直接 0 分，即使命中 reaction
     assert score("其他 UP 的 reaction", duration=61 * 60) == 0
 
 
-def test_score_charge_levels():
-    assert score("咻咻满 充电", duration=60) == 1
-    assert score("咻咻满 加急专场", duration=60) == 3
-    assert score("咻咻满 reaction 充电", duration=60) == 4
-    assert score("咻咻满 reaction 加急充电专场", duration=60) == 6
+def test_duration_boost():
+    assert score("咻咻满 reaction", duration=61 * 60) == 6
+    assert score("咻咻满 reaction", duration=31 * 60) == 5
+    assert score("咻咻满 reaction", duration=30 * 60) == 4
+    # 只有 require_title 一个命中时，时长仍计入（基础分偏低，不足以过线）
+    assert score("咻咻满", duration=0) == 1
+    assert score("咻咻满", duration=61 * 60) == 3
+    assert score("咻咻满 双人", duration=61 * 60) == 6
 
 
-def test_score_weak_positive():
-    assert score("咻咻满 双人", duration=60) == 1
-    assert score("咻咻满 reaction 双人", duration=60) == 4
+def test_negative_and_self():
+    assert score("咻咻满 切片", duration=60) == -5
+    assert score("咻咻满 reaction 切片", duration=60) == -2
+    assert score("咻咻满 reaction 直播录像", duration=60) == -2
+    assert score("咻咻满 reaction", up_mid=37754047, duration=60) == 1
 
 
-def test_duration_only_counts_with_signal():
-    assert score("咻咻满 reaction", duration=61 * 60) == 5
-    assert score("咻咻满 reaction", duration=31 * 60) == 4
-    assert score("咻咻满 reaction", duration=30 * 60) == 3
-    # 无 reaction / charge 信号时，时长不给分（避免纯长录像进池）。
-    assert score("咻咻满", duration=61 * 60) == 0
-    assert score("咻咻满 双人", duration=61 * 60) == 1
-
-
-def test_score_negative_and_self():
-    assert score("咻咻满 切片", duration=60) == -6
-    assert score("咻咻满 reaction 切片", duration=60) == -3
-    assert score("咻咻满 reaction 直播录像", duration=60) == -3
-    assert score("咻咻满 reaction", up_mid=37754047, duration=60) == 0
-
-
-def test_score_date_negative():
-    assert score("咻咻满 reaction 2026-10-28 完整录播", duration=60) == -9
-    assert score("咻咻满 reaction 2026-10-28", duration=60) == -3
-    assert score("咻咻满 充电 10月25日", duration=60) == -5
+def test_date_negative():
+    assert score("咻咻满 reaction 2026-10-28 完整录播", duration=60) == -8
+    assert score("咻咻满 reaction 2026-10-28", duration=60) == -2
+    assert score("咻咻满 充电 10月25日", duration=60) == -2
     disabled = dict(CLASSIFY, date_negative=False)
-    assert score("咻咻满 reaction 2026-10-28", duration=60, classify=disabled) == 3
+    assert score("咻咻满 reaction 2026-10-28", duration=60, classify=disabled) == 4
+
+
+def test_multi_hit_survives_single_negative():
+    # 回归：命中 咻咻满+reaction+充电 的 204min reaction 标题，扣掉「切片」后仍应过线
+    title = "【充电2.0 | 咻咻满reaction】翻唱和直播切片完全是在开盲盒呀！不知道今天会开到哪一款"
+    assert score(title, duration=204 * 60) == 5
+    assert score(title, duration=60) == 3
 
 
 def main():
     test_title_helpers()
     test_parse_duration()
     test_date_hits()
-    test_score_strong_reaction_requires_title()
-    test_score_charge_levels()
-    test_score_weak_positive()
-    test_duration_only_counts_with_signal()
-    test_score_negative_and_self()
-    test_score_date_negative()
+    test_hit_count_is_superlinear()
+    test_reaction_requires_title()
+    test_duration_boost()
+    test_negative_and_self()
+    test_date_negative()
+    test_multi_hit_survives_single_negative()
     print("OK: 候选标题归一化、时长解析与分类打分测试全部通过")
 
 

tests/test_discovery.py

@@ -47,7 +47,7 @@ def write_config(tmp, **discover):
             "date_negative": True,
             "duration_boost": {"gt_30min": 1, "gt_60min": 2},
         },
-        "notify": {"min_score": 3, "max_items_per_message": 10},
+        "notify": {"min_score": 4, "max_items_per_message": 10},
     }
     path = Path(tmp) / "config.json"
     path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
@@ -130,7 +130,7 @@ def test_filters_and_scoring():
             assert summary.blacklisted == 1
             assert summary.candidates == 1  # aid 6
             assert summary.notified == 0
-            assert repo.get_candidate(6)["score"] == 0
+            assert repo.get_candidate(6)["score"] == 1
             assert repo.get_candidate(2) is None
             assert repo.get_candidate(4) is None
             assert repo.get_candidate(5) is None