fix: MyMusicContent uses isLoading with fake 600ms timer

[Akatenvictor]

setTimeout(() => setIsLoading(false), 600) not tied to real data fetching.

Acceptance Criteria: Tie loading state to actual data fetching

[forexlord]

@forexlord has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer, i would love to work on this please

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[kodinaka30-ship-it]

@kodinaka30-ship-it has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Please maintainer assign this issue to me me to work on or I PERISH THIS WAVE

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[oladeeayo]

@oladeeayo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I would love to jump on this issue

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[devpeter999]

@devpeter999 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer! I’d love to take on this issue and contribute a solid solution.
I’ve reviewed the requirements and I’m confident I can implement the fix effectively.
I’m happy to get started and keep the changes clean, tested, and well-documented.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @devpeter999 to this issue.