[TC][Sourse block] Verify subheadings in modal window (e.g., "Цитати") opened from “Книги” card are written in bold

[NataliaGumenchyk]

Priority: Low

Preconditions

• The user is on the page https://historycode.online/vasyl-stus
• “Книги” card is visible and clickable in the “Для фанатів” section.

Steps to reproduce

1. Scroll down to the “Для фанатів” section.
2. Click on the “Книги” card.
3. Wait for the modal window to open.
4. Observe the formatting of all textual content, specifically subheadings.

Expected result

• In opened modal window subcategories should be written in bold.

User story: #41

Related bug: