refactor: optimize GSSoCContribution layout and reduce architectural …

[somu0571]

Description

This PR completely refactors the GSSoCContribution.js leaderboard file to address rendering stability, visual styling inconsistencies, and high structural complexity warnings from the static analyzer.

Summary of Changes:

• Architectural Refactoring: Extracted heavy nested layout code into dedicated, isolated sub-components (CountdownTimer, HeroStatCard, HorizontalTimeline) to significantly lower cyclomatic complexity.
• Performance Optimization: Wrapped extracted components in React's memo utility to prevent cascading tree re-renders during active user search inputs.
• Design Modernization: Replaced oversaturated neon purple/pink design primitives with a clean, professional, high-contrast palette supporting accessible light and dark mode viewports.
• Code Stability & Defense: Replaced standard JSON.parse state initializers with a robust safe-parsing utility hook (safeJsonParse) to avoid runtime crashes caused by corrupted localStorage strings.

Fixes #9151

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Screenshots / Video (if applicable)

N/A Basic styling changes, that makes it little professional

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have verified responsiveness and visual alignment on desktop and mobile viewports

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[codescene-access]

Code Health Improved (1 files improve in Code Health)

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Gates Passed
4 Quality Gates Passed

View Improvements

File	Code Health Impact	Categories Improved
GSSoCContribution.js	7.44 → 8.51	Complex Method, Large Method

Quality Gate Profile: Clean Code Collective
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