Added Icons in Genre Section, improved dark-mode style

[sau-mili]

Related Issue

closes #2786

Fixes: #(issue no.)

Description

• Added icons for each genre
• added respective styles
• modified the dark mode CSS

[Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.]

Type of PR

• Bug fix
• Feature enhancement
• Documentation update
• Other (specify): _______________

Screenshots / videos (if applicable)

[Attach any relevant screenshots or videos demonstrating the changes. Make sure to attach before & after screenshots in your PR.]

BEFORE

AFTER

IN DARK MODE

IN NORMAL

Checklist:

• I have made this change from my own.
• I have taken help from some online resources.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers and screenshots after making the changes.

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