fix: 出厂默认 topic 使用真实设备序列号 + PRINT 修正

- cfig_flash.c: factory_dev_info() 用 gMacAddr 生成真实主题 dld960/{SN}/srv + dld960/{SN}/dev
- net_srv.h: TOPIC_DEFAULT 加注释标明为格式模板
- net_srv.c: 修复上次提交的 PRINT 宏转义异常

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/cfig_flash.c

@@ -4,7 +4,7 @@
 * @author  			wfq 
 * @version 			V1.0
 * @date    			2025-02-07
-* @brief   			??????????¡ã?¡À???????????????
+* @brief   			??????????��?��???????????????
 * @attention		
 ******************************************************************************
 */
@@ -89,11 +89,23 @@ void factory_dev_info(void)
         "password",
         0
     };
+
+    // 使用实际设备序列号生成默认 topic（V1.01 双主题协议）
+    char sn_str[13];
+    sprintf(sn_str, "%02X%02X%02X%02X%02X%02X",
+        gMacAddr[0], gMacAddr[1], gMacAddr[2],
+        gMacAddr[3], gMacAddr[4], gMacAddr[5]);
+    char default_pub[64], default_sub[64];
+    sprintf(default_pub, "dld960/%s/dev", sn_str);
+    sprintf(default_sub, "dld960/%s/srv", sn_str);
+
     IOT_Topic _topic = {
         0,
-        TOPIC_DEFAULT_PUBLISH,
-        TOPIC_DEFAULT_SUBSCRIBE
+        {0},
+        {0}
     };
+    strncpy((char *)_topic.topic_pub, default_pub, MAX_TOPIC_LENGTH - 1);
+    strncpy((char *)_topic.topic_sub, default_sub, MAX_TOPIC_LENGTH - 1);
     
     write_net_config(&lcfg, &ccfg, &icfg, &_topic);
 }