fix(aiot): 截图刷新添加force参数，绕过WVP 5分钟缓存

getSnapUrl新增force参数，refreshSnap时传force=true，
使WVP后端跳过Redis缓存重新向Edge请求截图。

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

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

@@ -134,14 +134,14 @@ function goBack() {
 
 // ==================== 截图 ====================
 
-async function buildSnapUrl() {
+async function buildSnapUrl(force = false) {
   if (cameraCode.value) {
-    snapUrl.value = await getSnapUrl(cameraCode.value);
+    snapUrl.value = await getSnapUrl(cameraCode.value, force);
   }
 }
 
 async function refreshSnap() {
-  await buildSnapUrl();
+  await buildSnapUrl(true);
 }
 
 // ==================== ROI 数据加载 ====================