Function updateField

app/submit/page.tsx:222–225

(field: keyof FormData, value: string)

  const isCheckingProductId = formData.productId !== debouncedProductId && formData.productId.length >= 2

  const updateField = (field: keyof FormData, value: string) => {
    setFormData((prev) => ({ ...prev, [field]: value }))
    setError(null)
  }

  const parseAndApplyJson = (jsonString: string) => {
    setJsonError(null)