fix: 设备最后连接时间返回 UTC 时间戳，修复时区显示问题

main/manager-api/src/main/java/xiaozhi/modules/device/controller/DeviceController.java

@@ -29,6 +29,7 @@ import xiaozhi.modules.device.dto.DeviceUnBindDTO;
 import xiaozhi.modules.device.dto.DeviceUpdateDTO;
 import xiaozhi.modules.device.entity.DeviceEntity;
 import xiaozhi.modules.device.service.DeviceService;
+import xiaozhi.modules.device.vo.UserShowDeviceListVO;
 import xiaozhi.modules.security.user.SecurityUser;
 import xiaozhi.modules.sys.service.SysParamsService;
 
@@ -78,10 +79,10 @@ public class DeviceController {
     @GetMapping("/bind/{agentId}")
     @Operation(summary = "获取已绑定设备")
     @RequiresPermissions("sys:role:normal")
-    public Result<List<DeviceEntity>> getUserDevices(@PathVariable String agentId) {
+    public Result<List<UserShowDeviceListVO>> getUserDevices(@PathVariable String agentId) {
         UserDetail user = SecurityUser.getUser();
-        List<DeviceEntity> devices = deviceService.getUserDevices(user.getId(), agentId);
-        return new Result<List<DeviceEntity>>().ok(devices);
+        List<UserShowDeviceListVO> devices = deviceService.getUserDeviceList(user.getId(), agentId);
+        return new Result<List<UserShowDeviceListVO>>().ok(devices);
     }
 
     @PostMapping("/bind/{agentId}")

main/manager-api/src/main/java/xiaozhi/modules/device/service/DeviceService.java

@@ -30,6 +30,11 @@ public interface DeviceService extends BaseService<DeviceEntity> {
      */
     List<DeviceEntity> getUserDevices(Long userId, String agentId);
 
+    /**
+     * 获取用户指定智能体的设备列表（带时区处理），
+     */
+    List<UserShowDeviceListVO> getUserDeviceList(Long userId, String agentId);
+
     /**
      * 解绑设备
      */

main/manager-api/src/main/java/xiaozhi/modules/device/service/impl/DeviceServiceImpl.java

@@ -298,6 +298,21 @@ public class DeviceServiceImpl extends BaseServiceImpl<DeviceDao, DeviceEntity>
         return baseDao.selectList(wrapper);
     }
 
+    @Override
+    public List<UserShowDeviceListVO> getUserDeviceList(Long userId, String agentId) {
+        List<DeviceEntity> devices = getUserDevices(userId, agentId);
+        return devices.stream().map(device -> {
+            UserShowDeviceListVO vo = ConvertUtils.sourceToTarget(device, UserShowDeviceListVO.class);
+            // 手动设置deviceType（ConvertUtils按字段名匹配，board无法直接映射到deviceType）
+            vo.setDeviceType(device.getBoard());
+            // 设置UTC时间戳供前端使用时区转换
+            if (device.getLastConnectedAt() != null) {
+                vo.setLastConnectedAtTimestamp(device.getLastConnectedAt().getTime());
+            }
+            return vo;
+        }).toList();
+    }
+
     @Override
     public void unbindDevice(Long userId, String deviceId) {
         // 先查询设备信息，获取agentId
@@ -356,6 +371,10 @@ public class DeviceServiceImpl extends BaseServiceImpl<DeviceDao, DeviceEntity>
             sysUserUtilService.assignUsername(device.getUserId(),
                     vo::setBindUserName);
             vo.setDeviceType(device.getBoard());
+            // 设置UTC时间戳供前端使用时区转换
+            if (device.getLastConnectedAt() != null) {
+                vo.setLastConnectedAtTimestamp(device.getLastConnectedAt().getTime());
+            }
             return vo;
         }).toList();
         // 计算页数

main/manager-api/src/main/java/xiaozhi/modules/device/vo/UserShowDeviceListVO.java

@@ -1,8 +1,11 @@
 package xiaozhi.modules.device.vo;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
 
+import java.util.Date;
+
 @Data
 @Schema(description = "用户显示设备列表VO")
 public class UserShowDeviceListVO {
@@ -28,4 +31,11 @@ public class UserShowDeviceListVO {
     @Schema(description = "最近对话时间")
     private String recentChatTime;
 
+    @Schema(description = "最后连接时间(UTC毫秒)")
+    private Long lastConnectedAtTimestamp;
+
+    @Schema(description = "绑定时间")
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "UTC")
+    private Date createDate;
+
 }

main/manager-api/src/main/resources/application-dev.yml

@@ -12,7 +12,7 @@ spring:
     druid:
       #MySQL
       driver-class-name: com.mysql.cj.jdbc.Driver
-      url: jdbc:mysql://127.0.0.1:3306/xiaozhi_esp32_server?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&nullCatalogMeansCurrent=true
+      url: jdbc:mysql://127.0.0.1:3306/xiaozhi_esp32_server?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&nullCatalogMeansCurrent=true
       username: root
       password: 123456
       initial-size: 10