[Task]: Extract random font selection logic into a dedicated helper function

[sepandhaghighi]

Describe the feature you want to add

Refactor the random font selection logic in indirect_font() to reduce duplicated code and make adding new random font groups easier.

Describe your proposed solution

Create a new helper function random_from_group() in utils.py that receives a font size group name (small, medium, large, xlarge) and returns a random font from the corresponding list in RND_SIZE_DICT.

Replace the repeated conditional blocks inside indirect_font():

• rnd-small
• rnd-medium
• rnd-large
• rnd-xlarge

with a dictionary-based mapping between aliases and font groups. Use the helper function to return the selected font.

This reduces duplicated random.choice() calls and makes future random font categories easier to add.

Describe alternatives you've considered, if relevant

No response

Additional context

No response