feat(device): 实现新增设备接口

完善设备新增接口，增加SN唯一性校验、参数非空验证和默认状态设置。

src/main/java/com/youlai/boot/device/controller/DeviceController.java

@@ -6,6 +6,7 @@ import com.youlai.boot.common.enums.ActionTypeEnum;
 import com.youlai.boot.common.enums.LogModuleEnum;
 import com.youlai.boot.common.result.PageResult;
 import com.youlai.boot.common.result.Result;
+import com.youlai.boot.device.model.entity.SnDeviceInfo;
 import com.youlai.boot.device.model.query.DeviceQuery;
 import com.youlai.boot.device.model.vo.DeviceApkInfoVO;
 import com.youlai.boot.device.model.vo.DeviceHardwareInfoVO;
@@ -28,6 +29,8 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -69,6 +72,16 @@ public class DeviceController {
         return Result.success(detail);
     }
 
+    @Operation(summary = "新增设备")
+    @PostMapping
+    public Result<Void> addDevice(@RequestBody SnDeviceInfo device) {
+        boolean success = deviceService.addSn(device);
+        if (!success) {
+            return Result.failed("设备SN已存在或参数非法，新增失败");
+        }
+        return Result.success();
+    }
+
     // ===================== 设备系统信息（分面板独立接口） =====================
 
     @Operation(summary = "设备基本信息")

src/main/java/com/youlai/boot/device/service/impl/DeviceServiceImpl.java

@@ -181,12 +181,30 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, SnDeviceInfo> i
 
     @Override
     public boolean addSn(SnDeviceInfo device) {
-        return false;
+        if (device == null || device.getSerialno() == null || device.getSerialno().isBlank()) {
+            return false;
+        }
+        // 校验 SN 唯一
+        long count = this.count(new LambdaQueryWrapper<SnDeviceInfo>()
+                .eq(SnDeviceInfo::getSerialno, device.getSerialno()));
+        if (count > 0) {
+            log.warn("新增设备失败，SN 已存在: {}", device.getSerialno());
+            return false;
+        }
+        // 状态默认启用
+        if (device.getStatus() == null) {
+            device.setStatus(1);
+        }
+        boolean saved = this.save(device);
+        if (!saved) {
+            log.error("新增设备失败, sn: {}", device.getSerialno());
+        }
+        return saved;
     }
 
     @Override
     public boolean deleteSn(String sn) {
-        return false;
+            return false;
     }
 
     private PushSendParam getSinglePushSendParam(String sn, String type, String title, String content) {