feat: add flatten_output configuration to iteration node (#27502)

web/i18n/en-US/workflow.ts

@@ -788,6 +788,8 @@ const translation = {
         removeAbnormalOutput: 'Remove Abnormal Output',
       },
       answerNodeWarningDesc: 'Parallel mode warning: Answer nodes, conversation variable assignments, and persistent read/write operations within iterations may cause exceptions.',
+      flattenOutput: 'Flatten Output',
+      flattenOutputDesc: 'When enabled, if all iteration outputs are arrays, they will be flattened into a single array. When disabled, outputs will maintain a nested array structure.',
     },
     loop: {
       deleteTitle: 'Delete Loop Node?',

web/i18n/zh-Hans/workflow.ts

@@ -788,6 +788,8 @@ const translation = {
         removeAbnormalOutput: '移除错误输出',
       },
       answerNodeWarningDesc: '并行模式警告：在迭代中，回答节点、会话变量赋值和工具持久读/写操作可能会导致异常。',
+      flattenOutput: '扁平化输出',
+      flattenOutputDesc: '启用时，如果所有迭代输出都是数组，它们将被扁平化为单个数组。禁用时，输出将保持嵌套数组结构。',
     },
     loop: {
       deleteTitle: '删除循环节点？',