feat(aiot): 告警图片代理 + 告警列表页面

后端：
- IAiAlertService / AiAlertServiceImpl: 新增 proxyAlertImage()
  支持 COS object key（通过 CosUtil 生成 presigned URL）和完整 URL
- AiAlertController: 新增 GET /api/ai/alert/image 图片代理端点
- WebSecurityConfig: 白名单加 /api/ai/alert/image

前端：
- 新建 aiAlert.js API（列表查询、删除、统计、图片 URL 构造）
- 新建 alertList/index.vue 告警列表页面
  · 分页表格 + 类型/时间筛选
  · 缩略图通过 WVP 图片代理显示
  · 详情弹窗 + 删除功能
- router/index.js: 添加告警记录路由

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

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

@@ -9,6 +9,8 @@ import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -60,6 +62,19 @@ public class AiAlertController {
         return alertService.statistics(startTime);
     }
 
+    @Operation(summary = "告警图片代理（服务端从 COS 下载后返回）")
+    @GetMapping("/image")
+    public ResponseEntity<byte[]> getAlertImage(@RequestParam String imagePath) {
+        byte[] image = alertService.proxyAlertImage(imagePath);
+        if (image == null) {
+            return ResponseEntity.notFound().build();
+        }
+        return ResponseEntity.ok()
+                .contentType(MediaType.IMAGE_JPEG)
+                .header("Cache-Control", "public, max-age=3600")
+                .body(image);
+    }
+
     // ==================== Edge 告警上报 ====================
 
     @Operation(summary = "Edge 告警上报")

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

@@ -21,4 +21,12 @@ public interface IAiAlertService {
     Map<String, Object> statistics(String startTime);
 
     void updateDuration(String alertId, double durationMinutes);
+
+    /**
+     * 代理获取告警图片（通过 COS presigned URL 下载后返回字节）
+     *
+     * @param imagePath COS 对象路径
+     * @return JPEG 图片字节，失败返回 null
+     */
+    byte[] proxyAlertImage(String imagePath);
 }

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

@@ -3,12 +3,15 @@ package com.genersoft.iot.vmp.aiot.service.impl;
 import com.genersoft.iot.vmp.aiot.bean.AiAlert;
 import com.genersoft.iot.vmp.aiot.dao.AiAlertMapper;
 import com.genersoft.iot.vmp.aiot.service.IAiAlertService;
+import com.genersoft.iot.vmp.aiot.util.CosUtil;
 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.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
 
+import java.net.URI;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.*;
@@ -20,6 +23,9 @@ public class AiAlertServiceImpl implements IAiAlertService {
     @Autowired
     private AiAlertMapper alertMapper;
 
+    @Autowired
+    private CosUtil cosUtil;
+
     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
 
     @Override
@@ -72,4 +78,42 @@ public class AiAlertServiceImpl implements IAiAlertService {
     public void updateDuration(String alertId, double durationMinutes) {
         alertMapper.updateDuration(alertId, durationMinutes);
     }
+
+    @Override
+    public byte[] proxyAlertImage(String imagePath) {
+        if (imagePath == null || imagePath.isEmpty()) {
+            return null;
+        }
+
+        // 如果是完整 URL（https://），直接下载
+        if (imagePath.startsWith("http://") || imagePath.startsWith("https://")) {
+            try {
+                RestTemplate restTemplate = new RestTemplate();
+                return restTemplate.getForObject(URI.create(imagePath), byte[].class);
+            } catch (Exception e) {
+                log.error("[AiAlert] 直接下载告警图片失败: path={}, error={}", imagePath, e.getMessage());
+                return null;
+            }
+        }
+
+        // COS object key → 生成 presigned URL → 下载
+        if (!cosUtil.isAvailable()) {
+            log.warn("[AiAlert] COS 客户端未初始化，无法代理告警图片");
+            return null;
+        }
+
+        String presignedUrl = cosUtil.generatePresignedUrl(imagePath);
+        if (presignedUrl == null) {
+            log.error("[AiAlert] 生成 presigned URL 失败: imagePath={}", imagePath);
+            return null;
+        }
+
+        try {
+            RestTemplate restTemplate = new RestTemplate();
+            return restTemplate.getForObject(URI.create(presignedUrl), byte[].class);
+        } catch (Exception e) {
+            log.error("[AiAlert] 代理告警图片失败: path={}, error={}", imagePath, e.getMessage());
+            return null;
+        }
+    }
 }

src/main/java/com/genersoft/iot/vmp/conf/security/WebSecurityConfig.java

@@ -106,6 +106,7 @@ public class WebSecurityConfig {
         defaultExcludes.add("/api/ai/roi/snap/image");
         defaultExcludes.add("/api/ai/camera/get");
         defaultExcludes.add("/api/ai/alert/edge/**");
+        defaultExcludes.add("/api/ai/alert/image");
         defaultExcludes.add("/api/ai/device/edge/**");
 
         if (userSetting.getInterfaceAuthentication() && !userSetting.getInterfaceAuthenticationExcludes().isEmpty()) {