Privacy Policy Page Theme Mismatch and Missing Footer Navigation Link

[yuvraj-k-singh]

📝 Description

This PR resolves the UI theme mismatch bug on the Privacy Policy page and updates the layout to match the main application design specs. Additionally, it removes the old header-based navigation button and introduces a clean, rounded pill-shaped "Back to Home" navigation link right above the content box, styled with the project's exact cyan tint (#00cecb) to match our baseline templates.

Before:

**After:**

Key Changes:

• Updated color tokens (--bg-main, --bg-card, --text-muted) inside privacy-policy.html to align with the site's dark scheme values (#050505 / #0d0d0d).
• Integrated responsive light-to-dark transitions safely across all customized wrappers.
• Eliminated the old top-header back button to match modern minimalist layouts.
• Constructed an custom positioning layout to render the styled button precisely as requested by the structural guidelines.

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🔗 Linked Issue

Closes #573

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📋 Contribution Checklist

• My code strictly adheres to the project guidelines (Standard library only, procedural code, clean spacing).
• I have verified that my files are placed in the correct directory.
• I have tested my changes thoroughly on my local machine.
• I have included interactive emojis and clean console/UI outputs.
• GSSoC 2026: I have been formally assigned to this issue and noted it above.

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Project	Deployment	Actions	Updated (UTC)
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