Theme development

Morning people :-)

I have recently bought a theme that I really like with a lot of cool features.

I has different headers and footers I can choose among and a lot of different layout styles. And I have a styleswitcher on the frontpage to look at all the different ones. That I have deactivated when I found the ones I wanted to use.

I have installed the theme and it works like a charm, except that the frontpage won't use the same header and footer as the rest og the pages.

Is it possible by using the theme preprocessor add some classes to views generated rows?

For example: based on Drupal site about default theme implementation to display a view of unformatted rows.
views-view-unformatted.html.twig:

I have two taxonomies. I want different page templates for each taxonomy term page. Lets call the taxonomies as taxonomy_one and taxonomy_two.

When I go to taxonomy term twig debug suggests following names:

Drupal 8.3
Im sorry for my bad English.
I created a image field (unlimited). In my content type -> Manage display, i chose, Link image to file. And the photos are opened in a new window. How do add this (data-uk-lightbox) attribute to the link?

<a href="path" data-uk-lightbox title="">

Thanks in advance!!!

I'm theming the Forum module which comes with Drupal 8, and I've found something that seems odd.

The 'Add new Forum topic' link is wrapped in an li as expected, but that li is NOT contained in a ul. I see that the li and its link are being displayed from menu-local-action.html.twig. But that's nestled inside block.html.twig, and the block is just the Main page content system block.

This is DIFFERENT than the way menu-local-task.html.twig and menu-local-tasks.html.twig work.

This li needs a ul (and probably a nav) but where is that supposed to go?

Hi :-)

Would I be able to use a theme made for Drupal 7.4 on a 7.56 Drupal version?