refactor(prompt): 重构并统一提示词系统

- 删除旧的智能提示词系统（smart_prompt.py）和相关参数模块（prompt_parameters.py）
- 将 prompt_builder.py 重命名为 prompt.py 并精简功能
- 更新所有模块的导入路径从 `src.chat.utils.prompt_builder` 到 `src.chat.utils.prompt`
- 统一提示词构建接口，使用新的 PromptContext 替代 SmartPromptParameters
- 移除重复和冗余代码，简化系统架构

BREAKING CHANGE: 旧的 SmartPrompt 系统已被完全移除，所有相关模块需要改用新的统一 Prompt 系统

scripts/update_prompt_imports.py

@@ -0,0 +1,61 @@
+"""
+更新Prompt类导入脚本
+将旧的prompt_builder.Prompt导入更新为unified_prompt.Prompt
+"""
+
+import os
+import re
+from pathlib import Path
+
+# 需要更新的文件列表
+files_to_update = [
+    "src/person_info/relationship_fetcher.py",
+    "src/mood/mood_manager.py",
+    "src/mais4u/mais4u_chat/body_emotion_action_manager.py",
+    "src/chat/express/expression_learner.py",
+    "src/chat/planner_actions/planner.py",
+    "src/mais4u/mais4u_chat/s4u_prompt.py",
+    "src/chat/message_receive/bot.py",
+    "src/chat/replyer/default_generator.py",
+    "src/chat/express/expression_selector.py",
+    "src/mais4u/mai_think.py",
+    "src/mais4u/mais4u_chat/s4u_mood_manager.py",
+    "src/plugin_system/core/tool_use.py",
+    "src/chat/memory_system/memory_activator.py",
+    "src/chat/utils/smart_prompt.py"
+]
+
+def update_prompt_imports(file_path):
+    """更新文件中的Prompt导入"""
+    if not os.path.exists(file_path):
+        print(f"文件不存在: {file_path}")
+        return False
+    
+    with open(file_path, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # 替换导入语句
+    old_import = "from src.chat.utils.prompt_builder import Prompt, global_prompt_manager"
+    new_import = "from src.chat.utils.prompt import Prompt, global_prompt_manager"
+    
+    if old_import in content:
+        new_content = content.replace(old_import, new_import)
+        with open(file_path, 'w', encoding='utf-8') as f:
+            f.write(new_content)
+        print(f"已更新: {file_path}")
+        return True
+    else:
+        print(f"无需更新: {file_path}")
+        return False
+
+def main():
+    """主函数"""
+    updated_count = 0
+    for file_path in files_to_update:
+        if update_prompt_imports(file_path):
+            updated_count += 1
+    
+    print(f"\n更新完成！共更新了 {updated_count} 个文件")
+
+if __name__ == "__main__":
+    main()