fix: restore functionality to push valid files to the file list

Author: wxg0103

ui/src/components/ai-chat/component/chat-input-operate/index.vue

@@ -1313,9 +1313,9 @@ async function saveUrl() {
   // 并行处理所有 URL
   await Promise.all(validUrls.map(url => processUrl(url)));
 
-  // if (validFiles.length > 0) {
-  //   fileAllList.value.push(...validFiles);
-  // }
+  if (validFiles.length > 0) {
+    fileAllList.value.push(...validFiles);
+  }
 
   showURLSetting.value = false;
   urlForm.source_url = '';