Unify styles for create card button and link in page_header

- Add 'border-0 bg-transparent' classes to create_url link
- Now both create_modal (button) and create_url (link) have identical styling
- Fixes visual inconsistency between employees list (modal) and departments list (link)

backend/templates/includes/components/page_header.html

@@ -119,7 +119,7 @@
   {% elif create_url %}
     <div class="feed-card mb-2">
       <a href="{{ create_url }}"
-         class="dept-row d-flex w-100 justify-content-center align-items-center gap-2 text-decoration-none"
+         class="dept-row d-flex w-100 justify-content-center align-items-center gap-2 text-decoration-none border-0 bg-transparent"
          role="button" 
          aria-label="{{ create_text|default:'Создать' }}">
         <span class="feed-author">{{ create_text|default:"Создать" }}</span>