Add Storybook for component development and documentation

[Akatenvictor]

What

Set up Storybook for isolated component development, visual testing, and interactive documentation of the component library.

Why

Storybook lets developers build and test components in isolation without running the full application. It serves as living documentation for the component library and enables visual regression testing.

Scope

In scope:

• Install and configure Storybook for Next.js
• Create stories for core components: Sidebar, TopHeader, MusicLoader, OverviewCards
• Add controls for props manipulation
• Configure viewport addon for responsive testing
• Add a11y addon for accessibility checking

Out of scope:

• Stories for all components (add incrementally)
• Visual regression testing setup (separate issue)
• Design token documentation
• Deployment of Storybook

Acceptance Criteria

• Storybook runs locally with npm run storybook
• Stories exist for Sidebar, TopHeader, MusicLoader, OverviewCards
• Props controls work for each story
• Viewport addon shows responsive layouts
• a11y addon catches accessibility issues
• Build succeeds without errors

Technical Context

• Run npx storybook@latest init in the app/ directory
• Stories in app/src/components/ComponentName/ComponentName.stories.tsx

[Blaqkenny]

@Blaqkenny has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Maintainer, Please can i work on this and give you a better result

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Congratulations, @Enchanterme! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

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[Caneryy]

@Caneryy has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer, can I work on this issue?

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[drips-wave]

Congratulations, @alfeedrips! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @alfeedrips: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @alfeedrips as part of the Stellar Wave Program's 7th Wave 🥳

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