feat(vd960DBN)+fix(DBNMQTTool): MQTT 查询命令补齐 + 工具命令集对齐 (2026-08-18)

固件 (V4.2):
- iot_mqtt_srv.c 补齐 ssc_net_query / iot_net_query / iot_topic_query (只读全局组包, 与 TCP JSON §4.5/4.7/4.9 对齐)
- 修复实测: MQTT 通道 ssc_net_query/iot_net_query 返回 code=4 unsupported

工具:
- 禁用固件未实现的 6 个按钮 (ssc/iot_net/iot_topic_set + pwd_set/factory_reset/device_reset) + tooltip 引导 TCP/BLE
- 设备刷新列表移除 loop_param_query (固件未实现)
- offscreen 验证按钮状态正确

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c

@@ -671,6 +671,56 @@ static void iot_handle_publish(const char *topic, uint8_t *payload, int payload_
             msg_id, dev_time_now());
         iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
 
+    } else if (strcmp(cmd_str, "ssc_net_query") == 0) {
+        /* SSC 网络配置查询 (只读全局, 协议 V1.02) */
+        char resp[400];
+        snprintf(resp, sizeof(resp),
+            "{\"msg_id\":%lu,\"cmd\":\"ssc_net_query\","
+            "\"ts\":%lu,\"code\":0,\"msg\":\"success\","
+            "\"data\":{\"dev_ip\":\"%d.%d.%d.%d\",\"subnet_mask\":\"%d.%d.%d.%d\","
+            "\"route_ip\":\"%d.%d.%d.%d\",\"lssc_ip\":\"%d.%d.%d.%d\","
+            "\"dns\":\"%d.%d.%d.%d\",\"port\":%d}}",
+            msg_id, dev_time_now(),
+            local_net_cfg.lip[0], local_net_cfg.lip[1], local_net_cfg.lip[2], local_net_cfg.lip[3],
+            local_net_cfg.sub[0], local_net_cfg.sub[1], local_net_cfg.sub[2], local_net_cfg.sub[3],
+            local_net_cfg.gw[0], local_net_cfg.gw[1], local_net_cfg.gw[2], local_net_cfg.gw[3],
+            net_center_info.lssc_ip[0], net_center_info.lssc_ip[1],
+            net_center_info.lssc_ip[2], net_center_info.lssc_ip[3],
+            local_net_cfg.dns[0], local_net_cfg.dns[1], local_net_cfg.dns[2], local_net_cfg.dns[3],
+            net_center_info.tcp_port);
+        iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
+        PRINT("IOT: ssc_net_query dev_ip=%d.%d.%d.%d\n",
+              local_net_cfg.lip[0], local_net_cfg.lip[1], local_net_cfg.lip[2], local_net_cfg.lip[3]);
+
+    } else if (strcmp(cmd_str, "iot_net_query") == 0) {
+        /* IoT 网络配置查询 (只读全局) */
+        char resp[400];
+        snprintf(resp, sizeof(resp),
+            "{\"msg_id\":%lu,\"cmd\":\"iot_net_query\","
+            "\"ts\":%lu,\"code\":0,\"msg\":\"success\","
+            "\"data\":{\"host\":\"%s\",\"port\":%d,\"client_id\":\"%s\","
+            "\"username\":\"%s\",\"password\":\"%s\"}}",
+            msg_id, dev_time_now(),
+            iot_net_info.remote_addr, iot_net_info.mqtt_port,
+            iot_net_info.client_id, iot_net_info.username, iot_net_info.password);
+        iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
+        PRINT("IOT: iot_net_query host=%s port=%d\n",
+              iot_net_info.remote_addr, iot_net_info.mqtt_port);
+
+    } else if (strcmp(cmd_str, "iot_topic_query") == 0) {
+        /* IoT Topic 配置查询 (只读全局) */
+        char resp[300];
+        snprintf(resp, sizeof(resp),
+            "{\"msg_id\":%lu,\"cmd\":\"iot_topic_query\","
+            "\"ts\":%lu,\"code\":0,\"msg\":\"success\","
+            "\"data\":{\"client_id_enable\":%s,\"topic_pub\":\"%s\",\"topic_sub\":\"%s\"}}",
+            msg_id, dev_time_now(),
+            g_iot_topic.clientid_enable ? "true" : "false",
+            g_iot_topic.topic_pub, g_iot_topic.topic_sub);
+        iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
+        PRINT("IOT: iot_topic_query pub=%s sub=%s\n",
+              g_iot_topic.topic_pub, g_iot_topic.topic_sub);
+
     } else {
         // 暂不支持的命令, 返回错误
         char resp[256];