fix(brand): 品牌检测源文件改走 OSS URL（服务端化跨节点组装可用）

前端上传桥与降级桥透传 uploadOss；品牌页提交时 fileUrl 优先取上传响应的 OSS url，localPath 仅作旧桌面桥兜底。

frontend-vue/src/pages/brand/components/BrandBrandTab.vue

@@ -286,7 +286,7 @@ async function uploadBrandPathsToJava(paths: Array<string | BrandExpandFolderIte
   for (const item of paths) {
     const filePath = typeof item === 'string' ? item : item.absolutePath
     const relativePath = typeof item === 'string' ? undefined : item.relativePath
-    const uploaded = await api.upload_file_to_java(filePath, relativePath)
+    const uploaded = await api.upload_file_to_java(filePath, relativePath, true)
     if (!uploaded?.success || !uploaded.data) {
       throw new Error(uploaded?.error || uploaded?.message || `上传失败：${filePath}`)
     }
@@ -356,12 +356,13 @@ async function submitRun() {
   }
   submitting.value = true
   try {
-    // 上传后以服务器可读的 localPath 作为 fileUrl（Java resolveSourceFile 直接读临时文件）
+    // 上传后以可跨节点下载的源地址作为 fileUrl：优先 OSS url（uploadToOss=true 的桌面桥），
+    // 旧桌面桥只回 localPath（Java 容器临时路径，双活组装可能读不到），作为兜底仍透传。
     const files: UploadedFileRef[] = uploadedFiles.value.map((f) => ({
       fileKey: f.fileKey,
       originalFilename: f.originalFilename,
       relativePath: f.relativePath,
-      fileUrl: f.localPath,
+      fileUrl: f.url || f.localPath,
     }))
     if (runMode.value === 'immediate') {
       const res = await runBrandNow(files, strategy.value)