fix (AgentFlow) - generate ArrayInput item keys synchronously to prevent missing React keys (#6001)

* Fix to remove useEffect

* Fix gemini comment

Author: j-sanaa

packages/agentflow/src/atoms/ArrayInput.tsx

@@ -1,4 +1,4 @@
-import { type ComponentType, useCallback, useEffect, useMemo, useRef } from 'react'
+import { type ComponentType, useCallback, useMemo, useRef, useState } from 'react'
 
 import { Box, Button, Chip, IconButton } from '@mui/material'
 import { useTheme } from '@mui/material/styles'
@@ -42,16 +42,33 @@ export function ArrayInput({
         [data.inputValues, inputParam.name]
     )
 
-    // Stable keys for array items — avoids using index as React key
+    // Stable keys for array items — avoids using index as React key.
+    // Keys are held in state so they persist across renders. A local variable
+    // (`effectiveKeys`) is used for the current render pass so that newly
+    // generated keys are available immediately (setState alone would only
+    // take effect on the *next* render, leaving keys undefined in this one).
     const idCounterRef = useRef(0)
-    const itemKeysRef = useRef<string[]>([])
-
-    // Grow keys array when new items appear (e.g. on mount or external data changes)
-    useEffect(() => {
-        while (itemKeysRef.current.length < arrayItems.length) {
-            itemKeysRef.current.push(`item-${idCounterRef.current++}`)
+    const [itemKeys, setItemKeys] = useState<string[]>(() => {
+        const initial: string[] = []
+        while (initial.length < arrayItems.length) {
+            initial.push(`item-${idCounterRef.current++}`)
+        }
+        return initial
+    })
+
+    let effectiveKeys = itemKeys
+    if (effectiveKeys.length < arrayItems.length) {
+        const nextKeys = [...effectiveKeys]
+        while (nextKeys.length < arrayItems.length) {
+            nextKeys.push(`item-${idCounterRef.current++}`)
         }
-    }, [arrayItems.length])
+        setItemKeys(nextKeys)
+        effectiveKeys = nextKeys
+    } else if (effectiveKeys.length > arrayItems.length) {
+        const trimmed = effectiveKeys.slice(0, arrayItems.length)
+        setItemKeys(trimmed)
+        effectiveKeys = trimmed
+    }
 
     // Use pre-computed itemParameters
     // Falls back to raw field definitions for nested arrays without show/hide conditions.
@@ -113,7 +130,7 @@ export function ArrayInput({
     const handleDeleteItem = useCallback(
         (indexToDelete: number) => {
             const updatedArrayItems = arrayItems.filter((_, i) => i !== indexToDelete)
-            itemKeysRef.current.splice(indexToDelete, 1)
+            setItemKeys((prev) => prev.filter((_, i) => i !== indexToDelete))
 
             // Notify parent of change (parent will update props, causing re-render)
             onDataChange?.({ inputParam, newValue: updatedArrayItems })
@@ -145,7 +162,7 @@ export function ArrayInput({
 
                 return (
                     <Box
-                        key={itemKeysRef.current[index]}
+                        key={effectiveKeys[index]}
                         sx={{
                             p: 2,
                             mt: 2,