Improve accessibility and touch target size across views and styles

- Updated links in `back-login.blade.php` and `register.blade.php` to include `a11y-target-link` class for better accessibility.
- Adjusted styles in `_tables.scss` and `_cards.scss` to ensure minimum clickable area meets touch target requirements.
- Enhanced `SiteAssetPresenter` links with `site-asset-link` class for improved accessibility and consistency.

Author: rbruhn

resources/views/front/expedition/partials/expedition-loop.blade.php

@@ -27,7 +27,7 @@
             <div class="d-flex align-items-start justify-content-between mt-4 mx-auto">
                 {!! isset($project) ? $project->present()->project_page_icon : $expedition->project->present()->project_page_icon !!}
                 @isset($expedition->panoptesProject)
-                    @if ($expedition->zooActorExpedition->state > 1)
+                    @if ($expedition->zooActorExpedition->state === 2)
                         {!! $expedition->panoptesProject->present()->url !!}
                     @endif
                 @endisset