Ensure consistent visual styling and cursor behavior for clickable content-item titles across interfaces

[simon-clematide]

In the current article viewer, the Table of Contents (TOC) allows users to click on a title to navigate to the corresponding article. However, the TOC lacks any visual indication that the title is clickable, such as a cursor change or “link”-style interaction (e.g., underlining or a blue background, as seen in the search view).

This behavior is inconsistent with the search results view, where titles also serve as links to articles but are visually styled to indicate interactivity.

Expected behavior: Both interfaces—the TOC in the article view and the search hits in the search view—should provide consistent visual feedback, ensuring users can easily identify clickable links in both contexts.

Here is the search hit interface:

[danieleguido]

see also #1381