feat(aiot): 新增边缘设备分页/统计端点，修复 backfill 类型转换错误

- AiEdgeDeviceController 新增 /page、/get、/statistics 端点供前端直调
- AiEdgeDeviceMapper 新增 queryPage、countByStatus、countAll 方法
- AiEdgeDeviceServiceImpl 使用 PageHelper 实现分页查询和统计
- 修复 backfill-device-id 的 String→Integer ClassCastException：
  renameDeviceId 改为 renameByDeviceId，用 device_id 定位行

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/java/com/genersoft/iot/vmp/aiot/controller/AiConfigController.java

@@ -142,7 +142,7 @@ public class AiConfigController {
                 // 将第一个设备改名为 "edge"
                 AiEdgeDevice first = devices.get(0);
                 String oldId = first.getDeviceId();
-                edgeDeviceMapper.renameDeviceId(first.getId(), targetDeviceId);
+                edgeDeviceMapper.renameByDeviceId(oldId, targetDeviceId);
                 result.put("device_action", "renamed");
                 result.put("old_device_id", oldId);
                 log.info("[AiConfig] 已将设备 {} 改名为 {}", oldId, targetDeviceId);

src/main/java/com/genersoft/iot/vmp/aiot/controller/AiEdgeDeviceController.java

@@ -2,6 +2,8 @@ package com.genersoft.iot.vmp.aiot.controller;
 
 import com.genersoft.iot.vmp.aiot.bean.AiEdgeDevice;
 import com.genersoft.iot.vmp.aiot.service.IAiEdgeDeviceService;
+import com.genersoft.iot.vmp.vmanager.bean.WVPResult;
+import com.github.pagehelper.PageInfo;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import lombok.extern.slf4j.Slf4j;
@@ -9,6 +11,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
+import java.util.Map;
 
 @Slf4j
 @RestController
@@ -30,4 +33,27 @@ public class AiEdgeDeviceController {
     public AiEdgeDevice queryDetail(@PathVariable String deviceId) {
         return edgeDeviceService.queryByDeviceId(deviceId);
     }
+
+    @Operation(summary = "边缘设备分页查询")
+    @GetMapping("/page")
+    public WVPResult<PageInfo<AiEdgeDevice>> queryPage(
+            @RequestParam(defaultValue = "1") int pageNo,
+            @RequestParam(defaultValue = "20") int pageSize,
+            @RequestParam(required = false) String status) {
+        PageInfo<AiEdgeDevice> pageInfo = edgeDeviceService.queryPage(pageNo, pageSize, status);
+        return WVPResult.success(pageInfo);
+    }
+
+    @Operation(summary = "按设备ID查询")
+    @GetMapping("/get")
+    public WVPResult<AiEdgeDevice> queryByParam(@RequestParam String deviceId) {
+        AiEdgeDevice device = edgeDeviceService.queryByDeviceId(deviceId);
+        return WVPResult.success(device);
+    }
+
+    @Operation(summary = "设备统计")
+    @GetMapping("/statistics")
+    public WVPResult<Map<String, Object>> statistics() {
+        return WVPResult.success(edgeDeviceService.getStatistics());
+    }
 }

src/main/java/com/genersoft/iot/vmp/aiot/dao/AiEdgeDeviceMapper.java

@@ -36,4 +36,21 @@ public interface AiEdgeDeviceMapper {
 
     @Update("UPDATE wvp_ai_edge_device SET device_id=#{newDeviceId} WHERE id=#{id}")
     int renameDeviceId(@Param("id") Integer id, @Param("newDeviceId") String newDeviceId);
+
+    @Update("UPDATE wvp_ai_edge_device SET device_id=#{newDeviceId} WHERE device_id=#{oldDeviceId}")
+    int renameByDeviceId(@Param("oldDeviceId") String oldDeviceId, @Param("newDeviceId") String newDeviceId);
+
+    @Select({"<script>" +
+        "SELECT * FROM wvp_ai_edge_device " +
+        "WHERE 1=1 " +
+        "<if test='status != null'> AND status=#{status}</if> " +
+        "ORDER BY updated_at DESC" +
+        "</script>"})
+    List<AiEdgeDevice> queryPage(@Param("status") String status);
+
+    @Select("SELECT COUNT(*) FROM wvp_ai_edge_device WHERE status=#{status}")
+    int countByStatus(@Param("status") String status);
+
+    @Select("SELECT COUNT(*) FROM wvp_ai_edge_device")
+    int countAll();
 }

src/main/java/com/genersoft/iot/vmp/aiot/service/IAiEdgeDeviceService.java

@@ -1,8 +1,10 @@
 package com.genersoft.iot.vmp.aiot.service;
 
 import com.genersoft.iot.vmp.aiot.bean.AiEdgeDevice;
+import com.github.pagehelper.PageInfo;
 
 import java.util.List;
+import java.util.Map;
 
 public interface IAiEdgeDeviceService {
 
@@ -13,4 +15,8 @@ public interface IAiEdgeDeviceService {
     List<AiEdgeDevice> queryAll();
 
     void checkOffline();
+
+    PageInfo<AiEdgeDevice> queryPage(int page, int count, String status);
+
+    Map<String, Object> getStatistics();
 }

src/main/java/com/genersoft/iot/vmp/aiot/service/impl/AiEdgeDeviceServiceImpl.java

@@ -5,6 +5,8 @@ import com.alibaba.fastjson2.JSONObject;
 import com.genersoft.iot.vmp.aiot.bean.AiEdgeDevice;
 import com.genersoft.iot.vmp.aiot.dao.AiEdgeDeviceMapper;
 import com.genersoft.iot.vmp.aiot.service.IAiEdgeDeviceService;
+import com.github.pagehelper.PageHelper;
+import com.github.pagehelper.PageInfo;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.scheduling.annotation.Scheduled;
@@ -12,7 +14,9 @@ import org.springframework.stereotype.Service;
 
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 @Slf4j
 @Service
@@ -82,4 +86,20 @@ public class AiEdgeDeviceServiceImpl implements IAiEdgeDeviceService {
             log.warn("[AiEdgeDevice] 标记{}台设备为离线", count);
         }
     }
+
+    @Override
+    public PageInfo<AiEdgeDevice> queryPage(int page, int count, String status) {
+        PageHelper.startPage(page, count);
+        List<AiEdgeDevice> list = deviceMapper.queryPage(status);
+        return new PageInfo<>(list);
+    }
+
+    @Override
+    public Map<String, Object> getStatistics() {
+        Map<String, Object> stats = new HashMap<>();
+        stats.put("total", deviceMapper.countAll());
+        stats.put("online", deviceMapper.countByStatus("online"));
+        stats.put("offline", deviceMapper.countByStatus("offline"));
+        return stats;
+    }
 }