diff --git a/resources/catalog.json b/resources/catalog.json
index af5e8ab..8cae947 100644
--- a/resources/catalog.json
+++ b/resources/catalog.json
@@ -61895,13 +61895,13 @@
         {
           "key": "pictureSource",
           "label": "图像来源",
-          "widget": "radio",
+          "widget": "hidden",
           "type": "string",
           "displayType": "buttonGroup",
           "required": false,
           "defaultValue": "1",
           "placeholder": "",
-          "description": "选择要截图的图像来源，可以是当前屏幕，也可以是指定的图片文件。",
+          "description": "【界面已隐藏】实现默认截取当前屏幕；历史流程如存有 2(指定图片文件) 仍按原逻辑生效",
           "advanced": false,
           "valueTypes": [],
           "options": [
diff --git a/src/renderer/src/panels/Properties.tsx b/src/renderer/src/panels/Properties.tsx
index cf8deb5..1bb0b65 100644
--- a/src/renderer/src/panels/Properties.tsx
+++ b/src/renderer/src/panels/Properties.tsx
@@ -481,6 +481,21 @@ function fileFiltersFor(componentId: string, field: CatalogField): FileFilterOpt
   return filters;
 }
 
+/** 输出字段的保存框默认文件名：取第一个非「全部文件」过滤器的首个扩展名 */
+function defaultSaveFilename(filters: FileFilterOption[]): string {
+  const ext = filters.find((f) => !f.extensions.includes("*"))?.extensions[0];
+  return ext ? `未命名.${ext}` : "";
+}
+
+/** 保存结果没有扩展名时补上所选类型的扩展名（Windows 保存框不会自动补） */
+function ensureSaveExtension(filePath: string, filters: FileFilterOption[]): string {
+  const exts = filters.find((f) => !f.extensions.includes("*"))?.extensions ?? [];
+  if (!exts.length) return filePath;
+  const clean = filePath.trim();
+  if (/\.[A-Za-z0-9]+$/.test(clean)) return clean;
+  return `${clean}.${exts[0]}`;
+}
+
 function FieldControl({
   field,
   node,
@@ -533,12 +548,16 @@ function FieldControl({
           `${field.key} ${field.label ?? ""}`
         );
         if (isOutputField) {
+          const filters = fileFiltersFor(node.componentId, field);
+          // 预填默认文件名（按过滤器推断扩展名），避免弹出的保存框文件名为空没法直接点保存
+          const defaultPath = textOf(raw) || defaultSaveFilename(filters);
           const selected = await window.rpa.dialog.save({
             title: field.label,
-            defaultPath: textOf(raw) || undefined,
-            filters: fileFiltersFor(node.componentId, field)
+            defaultPath: defaultPath || undefined,
+            filters
           });
-          if (selected) onChange(field.key, selected);
+          // Windows 保存框不会按所选类型自动补扩展名，这里补上
+          if (selected) onChange(field.key, ensureSaveExtension(selected, filters));
           return;
         }
       }