System pages such Login produce wrong breadcrumbs

[fthobe]

Many pages like the Log-in Page produce incorrect breadcrumbs. Currently Products is practically reported back as root if the page is neither home nor a Taxon or Product.

breadcrumbs_component.rb

  def crumbs
    return @crumbs if @crumbs

    @crumbs = [
      { name: t('spree.home'), url: helpers.root_path },
      { name: t('spree.products'), url: helpers.products_path }
    ]

    if(taxon)
      @crumbs += taxon.ancestors.map do |ancestor|
        { name: ancestor.name, url: helpers.nested_taxons_path(ancestor.permalink) }
      end

      @crumbs << { name: taxon.name, url: helpers.nested_taxons_path(taxon.permalink) }
    end

    @crumbs
  end

In fact Google gives wrong breadcrumbs

Solidus Version:
Current

To Reproduce
Install starter-frontend

Current behavior
Wrong breadcrumbs are shown

Expected behavior
The page should produce a breadcrumb path similar to Home > Login.
A login page breadcrumb can be ommited according to specifications, but the page should be placed in the correct paternal element (eg Home or Home > Account)

Screenshots

Desktop (please complete the following information):
N/A

Smartphone (please complete the following information):
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