Set of questions about kirby admin

Hi there, I have made a dashboard with tabs. The whole idea is based on the demokit/agency but I would love to understand kirby better and I am trying some modifications.

For example my blogs. Right now as it seems I have to create the layout in the site.yml for the tabs but I really love the layout of the actual pages/blog.yml (this one I have based on the demokit/blog

site.yml

tabs: 
... 

blogs:
    label: Blog
    icon: file-text
    sections:
      blogs:
        extends: sections/blog/articles
        layout: cards
        label: Published Articles
        type: pages
        status: listed
        image:
          cover: true
          back: white

Is there a way to directly link to the pages/blog.yml ? when I click the tab “blog” instead of seeing what I design in site.yml?

As a secondary question:

on my projects.yml I have created some columns which works fine. but then I learned about line

I have created 2 colums for my top meta data and now created a full width column below everything to display the gallery. but since the “add” button is very close to my other columns I want to separate it with a line.

Unfortunately this does not work:

columns:
  - width: 1/2
....
...
 - width: 1/2
....
...
  - width: 1/1
    sections:
      line:
        type: line
      gallery:
        type: files
        template: project-image
        layout: cards

This does show the line but then the gallery is empty…

  - width: 1/1
    sections:
    fields:
      line:
        type: line
        width: 1/1
      gallery:
        type: files
        template: project-image
        layout: cards

only this seem to work:

  - width: 1/1
    sections:
    fields:
      line:
        type: line
        width: 1/1
  — width: 1/1
    sections:  
      gallery:
        type: files
        template: project-image
        layout: cards

Thank you.