Font Area Not Properly Set When Applying lineHeight and fontSize to Page

[LoganBaek97]

Describe the bug
I'm experiencing an issue with font rendering after upgrading from v3.4.4 to v4.x (tested with v4.0.0 and v4.1.5). When applying lineHeight and fontSize to the page, the font area is not being correctly calculated.

When examining the current implementation, I noticed that title and author elements with different font sizes are both rendering with a consistent 18px height, which appears to be unexpected behavior.

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To Reproduce
Please click this link and see styles.body

Expected behavior (v3.4.4)

• Different font sizes should result in proportionally different line heights
• Font area should accurately reflect the specified font sizes

Current Behavior (v4.x)

• Different font sizes result in uniform 18px height
• Font area does not adapt correctly to size changes

Screenshots

Desktop (please complete the following information):

• OS: MacOS
• Browser chrome
• React-pdf version v4.1.5, v4.0.0

[Bluegragon]

Hey Can I work on this

[LoganBaek97]

@Bluegragon What work?

[Bluegragon]

😅😅 I wanted to work on the given issue, I'm pretty new to the open source community so I don't know the norms of it @LoganBaek97

[LoganBaek97]

@Bluegragon Oh, I understand now! I would be very grateful if you could help resolve this. However, I'm also unsure about how to contribute. How can we do that? @diegomura