アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

frontend/src/components/posts/PostTextField.tsx

@@ -5,11 +5,11 @@ import { inputClass } from '@/lib/utils'
 import type { FC, ReactNode } from 'react'
 
 type Props = {
-  label:        string
+  label:        ReactNode
   value:        string
   onChange:     (value: string) => void
-  warnings?:    string[]
-  errors?:      string[]
+  warnings?:    ReactNode[]
+  errors?:      ReactNode[]
   disabled?:    boolean
   type?:        string
   placeholder?: string