fix: summary card with no category

[stephanegigandet]

I think my issue #1106 is due to products without a category, I have errors in the debugger on the call to .last

final String? categoryTag = widget._product.categoriesTags?.last;

This PR seems to solve the problem for me.

[monsieurtanuki]

That's good @stephanegigandet!

My bad with a lazy management of null.

A suggestion for code clarity given the length of the line: you need just one test (twice). And we need both fields to be populated.

String? categoryTag;
String? categoryLabel;
if (widget._product.categoriesTags?.isNotEmpty ?? false) {
  categoryTag = widget._product.categoriesTags!.last;
  if (widget._product.categoriesTagsInLanguages?[ProductQuery.getLanguage()!]?.isNotEmpty ?? false) {
    categoryLabel = widget._product.categoriesTagsInLanguages![ProductQuery.getLanguage()!]!.last; 
  }
}

[stephanegigandet]

Thank you @monsieurtanuki , I commited your suggestion.

[teolemon]

thanks @stephanegigandet