`shop_locale.root_url` always returns current session's locale path instead of language-specific URL

[wehrmarc]

Description

shop_locale.root_url inside a localization.available_countries / country.available_languages loop does not return the root URL for that language — it returns the root URL of the currently active locale for every iteration.

Liquid template:

{%- for country in localization.available_countries -%}
  "{{ country.iso_code }}": [
    {%- for lang in country.available_languages -%}
      {
        "iso_code": "{{ lang.iso_code }}",
        "endonym_name": {{ lang.endonym_name | json }},
        "root_url": {{ lang.root_url | json }}
      }{% unless forloop.last %},{% endunless %}
    {%- endfor -%}
  ]{% unless forloop.last %},{% endunless %}
{%- endfor -%}

Resulting output (truncated):

"AT": [
  {"iso_code": "de", "endonym_name": "Deutsch", "root_url": "/en-gb"},
  {"iso_code": "en", "endonym_name": "English", "root_url": "/en-gb"}
],
"DK": [
  {"iso_code": "da", "endonym_name": "Dansk",   "root_url": "/en-gb"},
  {"iso_code": "en", "endonym_name": "English", "root_url": "/en-gb"}
],
...

Every root_url is /en-gb — the path of the active session locale — regardless of which country or language is being iterated.

Expected behavior:

lang.root_url should return the root URL path for that specific language, e.g.:

"AT": [
  {"iso_code": "de", "endonym_name": "Deutsch",  "root_url": "/de"},
  {"iso_code": "en", "endonym_name": "English",  "root_url": "/en-gb"}
],
"DK": [
  {"iso_code": "da", "endonym_name": "Dansk",    "root_url": "/da"},
  {"iso_code": "en", "endonym_name": "English",  "root_url": "/en-gb"}
],

Impact:

This makes it impossible to build a reliable language/country switcher using localization.available_countries — the root_url property is unusable for any language other than the currently active one.

Environment:

• Reproduced on a live Shopify storefront with multiple market/language configurations
• Active locale at time of render: en-gb
• All other locales inherit the same /en-gb root URL

[hiSandog]

A regression case could iterate multiple countries and languages while the active session locale differs from each first entry, preventing the current locale from masking the bug. Languages sharing an ISO code but using different market paths would provide another useful boundary. The expected contract should also clarify whether root_url includes only a language prefix or any country or market prefix.