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From: tt-P607 <68868379+tt-P607@users.noreply.github.com>
Date: Fri, 26 Sep 2025 23:11:55 +0800
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移除全局的 `enable_expression` 配置项，转而使用 `get_expression_config_for_chat` 方法在生成提示词时动态判断。

原有的全局开关不够灵活，无法满足分聊天、分群组控制表达功能的需求。此次重构通过在运行时检查每个聊天的具体配置，实现了更精细化的功能启用控制。

BREAKING CHANGE: 全局配置项 `expression.enable_expression` 已被移除。现在需要通过表达规则来为不同的聊天单独控制功能的启用状态。
---
 src/chat/utils/prompt.py       | 3 ++-
 src/config/official_configs.py | 1 -
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/chat/utils/prompt.py b/src/chat/utils/prompt.py
index 3ae75c923..112db6726 100644
--- a/src/chat/utils/prompt.py
+++ b/src/chat/utils/prompt.py
@@ -483,7 +483,8 @@ class Prompt:
 
     async def _build_expression_habits(self) -> Dict[str, Any]:
         """构建表达习惯"""
-        if not global_config.expression.enable_expression:
+        use_expression, _, _ = global_config.expression.get_expression_config_for_chat(self.parameters.chat_id)
+        if not use_expression:
             return {"expression_habits_block": ""}
 
         try:
diff --git a/src/config/official_configs.py b/src/config/official_configs.py
index 6ab914a93..3ba341997 100644
--- a/src/config/official_configs.py
+++ b/src/config/official_configs.py
@@ -308,7 +308,6 @@ class ExpressionRule(ValidatedConfigBase):
 class ExpressionConfig(ValidatedConfigBase):
     """表达配置类"""
 
-    enable_expression: bool = Field(default=True, description="是否启用表达")
     rules: List[ExpressionRule] = Field(default_factory=list, description="表达学习规则")
 
     def _parse_stream_config_to_chat_id(self, stream_config_str: str) -> Optional[str]: