fix: conditionally render FieldListContainer based on inputFields length

web/app/components/rag-pipeline/components/input-field/field-list/index.tsx

@@ -45,14 +45,16 @@ const FieldList = ({
           <RiAddLine className='h-4 w-4 text-text-tertiary' />
         </ActionButton>
       </div>
-      <FieldListContainer
-        className='flex flex-col gap-y-1 px-4 pb-2'
-        inputFields={inputFields}
-        onEditField={handleOpenInputFieldEditor}
-        onRemoveField={handleRemoveField}
-        onListSortChange={handleListSortChange}
-        readonly={readonly}
-      />
+      {inputFields.length > 0 && (
+        <FieldListContainer
+          className='flex flex-col gap-y-1 px-4 pb-2'
+          inputFields={inputFields}
+          onEditField={handleOpenInputFieldEditor}
+          onRemoveField={handleRemoveField}
+          onListSortChange={handleListSortChange}
+          readonly={readonly}
+        />
+      )}
       {showInputFieldEditor && (
         <InputFieldEditor
           show={showInputFieldEditor}