后端没修完版

src/langbot/templates/metadata/nodes/iterator.yaml

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+# Iterator Node Configuration
+name: iterator
+category: control
+icon: "🔄"
+color: '#f59e0b'
+description: 'workflows.nodes.iteratorDescription'
+
+inputs:
+  - name: array
+    type: array
+    label:
+      en_US: Array
+      zh_Hans: 数组
+    description:
+      en_US: Array to iterate
+      zh_Hans: 要迭代的数组
+
+outputs:
+  - name: item
+    type: any
+    label:
+      en_US: Item
+      zh_Hans: 项目
+    description:
+      en_US: Current item
+      zh_Hans: 当前项目
+  - name: index
+    type: integer
+    label:
+      en_US: Index
+      zh_Hans: 索引
+    description:
+      en_US: Current index
+      zh_Hans: 当前索引
+  - name: is_first
+    type: boolean
+    label:
+      en_US: Is First
+      zh_Hans: 是否第一个
+    description:
+      en_US: Whether this is the first item
+      zh_Hans: 是否是第一个项目
+  - name: is_last
+    type: boolean
+    label:
+      en_US: Is Last
+      zh_Hans: 是否最后一个
+    description:
+      en_US: Whether this is the last item
+      zh_Hans: 是否是最后一个项目
+
+config:
+  - name: parallel
+    type: boolean
+    default: false
+    label:
+      en_US: Parallel
+      zh_Hans: 并行
+    description:
+      en_US: Whether to process in parallel
+      zh_Hans: 是否并行处理
+
+  - name: max_concurrency
+    type: integer
+    default: 5
+    min_value: 1
+    max_value: 100
+    label:
+      en_US: Max Concurrency
+      zh_Hans: 最大并发数
+    description:
+      en_US: Maximum concurrent tasks
+      zh_Hans: 最大并发任务数
+    show_if:
+      parallel: true