fix(llm): 提及不再被低价值社交惩罚抵消，别名唤醒可过必要性门禁

Author: TogetsuDo

pallas/product/llm/reply_necessity.py

@@ -175,7 +175,7 @@ def score_reply_necessity(
     if has_reply_obligation(plain):
         score += 20
         parts.append("obligation+20")
-    if is_low_value_social_turn(plain):
+    if is_low_value_social_turn(plain) and not (is_mentioned or is_followup):
         score -= 35
         parts.append("low_social-35")
     if has_recent_back_and_forth:

tests/product/llm/test_reply_necessity.py

@@ -71,6 +71,17 @@ def test_mentioned_question_crosses_reply_necessity_threshold() -> None:
     assert result.score >= REPLY_NECESSITY_TRIGGER_SCORE
 
 
+def test_mentioned_short_social_turn_crosses_reply_necessity_threshold() -> None:
+    result = evaluate_reply_necessity_gate(
+        text="牛牛晚饭吃了没",
+        is_mentioned=True,
+        has_recent_back_and_forth=True,
+    )
+
+    assert result.decision == "proceed"
+    assert result.score >= REPLY_NECESSITY_TRIGGER_SCORE
+
+
 @pytest.mark.parametrize(
     ("kwargs", "name"),
     [