MarkdownRenderer sends unsanitized HTML during SSR

[RUKAYAT-CODER]

Overview
src/components/shared/MarkdownRenderer.tsx (lines 177-212) returns the raw markdownToHtml output without running DOMPurify when typeof window === 'undefined' (line 179). Because Next.js renders on the server, the initial HTML injected via dangerouslySetInnerHTML is unsanitized until the client hydrates, so untrusted markdown can inject markup/handlers into the server-rendered response. Sanitize on both server and client (e.g. isomorphic DOMPurify).

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I would like to contribute to this issue. I have experience with JavaScript/TypeScript, React, backend APIs, testing, Git, and software architecture. I will follow the acceptance criteria, add tests, and provide a focused pull request.

[Sleuthemmy]

@Sleuthemmy 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 issue, i have already gone through the description and i have experience with it. Please assign it to me and i will submit a good PR.

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[Benedict315]

@Benedict315 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello please assign me to this issue

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[xtrial01]

@xtrial01 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I can work on this issue. I assure to deliver within 24hrs

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Congratulations, @Benedict315! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@Benedict315's PR #1247 was approved and merged by @RUKAYAT-CODER.

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👏 Great work, @Benedict315! Keep contributing to rinafcode.

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This issue has been completed by @Benedict315 as part of the Stellar Wave Program's 8th Wave 🥳

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