fix: improve navbar active state and underline behavior

[bablulodha37]

Description

• Fixed active state detection for navbar items.
• Added support for path + hash based navigation.
• Improved underline animation behavior on hover and active links.
• Ensured Home tab is active only when there is no hash in the URL.

Type of Change

• Bug fix
• New feature
• Documentation update

Screenshots

(Add screenshots or screen recording if UI changes are visible.)

Closes #

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[github-actions]

Hi @bablulodha37, thanks for contributing to Nyay Setu! 🎉

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[viru0909-dev]

PR has merge conflicts in Header.jsx. Please resolve them.