编程课类型封面加入默认封面

src/views/blockly/blocklyType/BlocklyTypeForm.vue

@@ -176,7 +176,7 @@ const resetForm = () => {
   formData.value = {
     id: undefined,
     ctType: undefined,
-    ctTypeNode: 0,
+    fctTypeImage: "https://learn-ai.com.cn/admin-api/infra/file/29/get/20251212/common_1765522078241.png",
     ctTypeSort: undefined,
     ctParentId: 0,
     ctTypeDescribe: undefined,