fix(aiot): 截图持久化适配 + 告警 API 切换到 WVP + 图片代理

截图 / ROI：
- getSnapUrl: 非 force 模式直接返回 /snap/image 代理 URL（从 DB 读持久化截图，
  不触发 Edge），force 模式先请求 Edge 截图再返回代理 URL
- RoiCanvas: 添加 ResizeObserver 确保容器尺寸变化时重新初始化 canvas，
  onImageError 兜底初始化 canvas（截图失败仍可绘制/查看 ROI），
  snapUrl watcher 触发 canvas 重初始化

告警：
- alarm/index.ts: requestClient → wvpRequestClient，路径从
  /aiot/alarm/alert/* 切换到 /aiot/device/alert/*（走 WVP 后端）
- Alert 类型新增 imagePath、receivedAt、extraData 字段
- alarm list: 缩略图和详情图片通过 WVP /alert/image 代理端点显示，
  避免 COS presigned URL 过期问题
- device/index.ts: 新增 getAlertImageUrl() 构造告警图片代理 URL

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

apps/web-antd/src/views/aiot/alarm/list/index.vue

@@ -2,7 +2,7 @@
 import type { VxeTableGridOptions } from '#/adapter/vxe-table';
 import type { AiotAlarmApi } from '#/api/aiot/alarm';
 
-import { h, ref } from 'vue';
+import { h, onMounted, ref } from 'vue';
 
 import { Page } from '@vben/common-ui';
 
@@ -10,6 +10,7 @@ import { Button, Image, message, Modal, Tag } from 'ant-design-vue';
 
 import { ACTION_ICON, TableAction, useVbenVxeGrid } from '#/adapter/vxe-table';
 import { getAlert, getAlertPage, handleAlert } from '#/api/aiot/alarm';
+import { getAlertImageUrl } from '#/api/aiot/device';
 
 import {
   ALERT_LEVEL_OPTIONS,
@@ -21,6 +22,21 @@ import {
 
 defineOptions({ name: 'AiotAlarmList' });
 
+/** 告警图片 URL 缓存（imagePath → 代理 URL） */
+const imageUrlCache = ref<Record<string, string>>({});
+
+/** 获取告警图片代理 URL（异步构造后缓存） */
+function getImageProxyUrl(row: AiotAlarmApi.Alert): string {
+  const imagePath = row.imagePath || row.ossUrl || row.snapshotUrl;
+  if (!imagePath) return '';
+  if (imageUrlCache.value[imagePath]) return imageUrlCache.value[imagePath]!;
+  // 异步构造并缓存
+  getAlertImageUrl(imagePath).then((url) => {
+    imageUrlCache.value[imagePath] = url;
+  });
+  return '';
+}
+
 /** 格式化持续时长（毫秒 → 可读文本） */
 function formatDuration(ms: number | null | undefined): string {
   // 当 duration_ms 为 null 时，说明告警仍在进行中
@@ -247,11 +263,11 @@ const [Grid, gridApi] = useVbenVxeGrid({
       <!-- 截图缩略图列 -->
       <template #snapshot="{ row }">
         <Image
-          v-if="row.snapshotUrl || row.ossUrl"
-          :src="row.ossUrl || row.snapshotUrl"
+          v-if="getImageProxyUrl(row)"
+          :src="getImageProxyUrl(row)"
           :width="40"
           :height="40"
-          :preview="{ src: row.ossUrl || row.snapshotUrl }"
+          :preview="{ src: getImageProxyUrl(row) }"
           :fallback="`data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40'><rect width='40' height='40' fill='%23f0f0f0'/><text x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23bbb' font-size='12'>-</text></svg>`"
           style="object-fit: cover; border-radius: 4px; cursor: pointer"
         />
@@ -350,26 +366,16 @@ const [Grid, gridApi] = useVbenVxeGrid({
         </div>
 
         <!-- 告警截图 -->
-        <div v-if="currentAlert.ossUrl || currentAlert.snapshotUrl">
+        <div v-if="getImageProxyUrl(currentAlert)">
           <span class="text-gray-500">告警截图：</span>
           <div class="mt-2">
             <Image
-              :src="currentAlert.ossUrl || currentAlert.snapshotUrl"
+              :src="getImageProxyUrl(currentAlert)"
               :width="300"
-              :preview="{ src: currentAlert.ossUrl || currentAlert.snapshotUrl }"
+              :preview="{ src: getImageProxyUrl(currentAlert) }"
               :fallback="`data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='300' height='200'><rect width='300' height='200' fill='%23f5f5f5'/><text x='50%25' y='50%25' dominant-baseline='middle' text-anchor='middle' fill='%23bbb' font-size='14'>图片加载失败</text></svg>`"
             />
           </div>
-          <div class="mt-1">
-            <a
-              :href="currentAlert.ossUrl || currentAlert.snapshotUrl"
-              target="_blank"
-              rel="noopener noreferrer"
-              class="text-blue-500 text-xs hover:underline"
-            >
-              {{ currentAlert.ossUrl || currentAlert.snapshotUrl }}
-            </a>
-          </div>
         </div>
 
         <!-- 检测区域 -->

apps/web-antd/src/views/aiot/device/roi/components/RoiCanvas.vue

@@ -47,17 +47,32 @@ watch(() => props.drawMode, () => {
 watch(() => props.snapUrl, () => {
   loading.value = true;
   errorMsg.value = '';
+  nextTick(() => initCanvas());
 });
 
+let resizeObserver: ResizeObserver | null = null;
+
 onMounted(() => {
   nextTick(() => {
     initCanvas();
+    if (wrapper.value && typeof ResizeObserver !== 'undefined') {
+      resizeObserver = new ResizeObserver(() => {
+        if (wrapper.value && wrapper.value.clientWidth > 0) {
+          initCanvas();
+        }
+      });
+      resizeObserver.observe(wrapper.value);
+    }
     window.addEventListener('resize', handleResize);
   });
 });
 
 onUnmounted(() => {
   window.removeEventListener('resize', handleResize);
+  if (resizeObserver) {
+    resizeObserver.disconnect();
+    resizeObserver = null;
+  }
 });
 
 function onImageLoad() {
@@ -68,6 +83,8 @@ function onImageLoad() {
 function onImageError() {
   loading.value = false;
   errorMsg.value = '截图加载失败，请确认摄像头正在拉流';
+  // 关键：截图失败也初始化 canvas，使 ROI 区域可见可操作
+  nextTick(() => initCanvas());
 }
 
 function initCanvas() {