add some code

main/boards/common/press_to_talk_mcp_tool.h

@@ -0,0 +1,29 @@
+#ifndef PRESS_TO_TALK_MCP_TOOL_H
+#define PRESS_TO_TALK_MCP_TOOL_H
+
+#include "mcp_server.h"
+#include "settings.h"
+
+// 可复用的按键说话模式MCP工具类
+class PressToTalkMcpTool {
+private:
+    bool press_to_talk_enabled_;
+
+public:
+    PressToTalkMcpTool();
+    
+    // 初始化工具，注册到MCP服务器
+    void Initialize();
+    
+    // 获取当前按键说话模式状态
+    bool IsPressToTalkEnabled() const;
+
+private:
+    // MCP工具的回调函数
+    ReturnValue HandleSetPressToTalk(const PropertyList& properties);
+    
+    // 内部方法：设置press to talk状态并保存到设置
+    void SetPressToTalkEnabled(bool enabled);
+};
+
+#endif // PRESS_TO_TALK_MCP_TOOL_H