test(useShareActions): verify dark and light color scheme contrast visual cohesion (#4504)

[atharv96k]

🧩 Background

This PR addresses Issue #4504, focusing on establishing comprehensive, isolated unit and integration testing targeting Dark and Light Prefers-Color-Scheme Visual Cohesion within the share orchestration engine of hooks/useShareActions.ts.

🎯 Objective

Introduces a brand-new, dependency-free test file hooks/useShareActions.theme-contrast.test.ts to ensure that active share card components, modal background overlays, and button typography colors adapt safely with high contrast boundaries under dual environments without triggering heavy DOM simulation constraints.

🛠️ Implementation Details

• Dual Theme Mocks: Emulates isolated environment states for both dark and light options smoothly inside runtime data properties.
• Color Adaptive Styling: Asserts foundational visual configurations react properly to distinct palette updates.
• Contrast Telemetry Checks: Ensures relative readability contrast bounds satisfy strict WCAG AA rules ($\ge 4.5:1$).
• Custom Utility Tracking: Verifies premium styling layer tokens (shadow-share-glow-dark, shadow-share-glow-light) map correctly into the configuration arrays.
• Overlay Protection: Evaluates glassmorphic modal backgrounds to guarantee structural layout elements prevent bleeding or foreground textual clipping.

✅ Definition of Done

• 5 isolated test cases created and fully validated.
• vitest run useShareActions.theme-contrast passes perfectly (5/5).
• npx tsc --noEmit runs completely clean with zero type errors.
• npm run lint clears with 0 errors across target files.

Fixes #4504

[Aamod-Dev]

I appreciate the attention to detail here. The changes make sense and fit well with our current structure.

The test coverage added here looks comprehensive and well-structured. It definitely improves the reliability of the system.

I've approved the PR. Thanks again!

[Aamod-Dev]

Thanks for the PR. I've reviewed the changes and they look good to me.

The test coverage added here looks comprehensive and well-structured. It definitely improves the reliability of the system.

Merging this looks safe. Approved!

[Aamod-Dev]

Thanks for putting this together. The code looks clean and solves the issue effectively.

No concerns from my end. Approved.

[github-actions]

🎉 Congratulations @atharv96k! Your PR has been successfully merged. 🚀

Thank you for contributing to CommitPulse. Your work helps us build a better tool for the community.

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[Aamod-Dev]

Review Summary
Removed extra type labels ( ype:design, type:devops) to strictly meet the rule of exactly one type label ( ype:testing retained).