refactor: rename function lib export subfix

--bug=1052638 --user=刘瑞斌 函数库导出后缀名优化 https://www.tapd.cn/57709429/s/1660837

Author: liuruibin

apps/function_lib/serializers/function_lib_serializer.py

@@ -249,7 +249,7 @@ def export(self, with_valid=True):
                 mk_instance = FlibInstance(application_dict, 'v1')
                 application_pickle = pickle.dumps(mk_instance)
                 response = HttpResponse(content_type='text/plain', content=application_pickle)
-                response['Content-Disposition'] = f'attachment; filename="{function_lib.name}.flib"'
+                response['Content-Disposition'] = f'attachment; filename="{function_lib.name}.fx"'
                 return response
             except Exception as e:
                 return result.error(str(e), response_status=status.HTTP_500_INTERNAL_SERVER_ERROR)

ui/src/api/function-lib.ts

@@ -105,7 +105,7 @@ const exportFunctionLib = (
   loading?: Ref<boolean>
 ) => {
   return exportFile(
-    name + '.flib',
+    name + '.fx',
     `${prefix}/${id}/export`,
     undefined,
     loading