centralize sidebar layout state

[ash1shkumar]

📝 Description

This PR improves sidebar and layout state coordination by centralizing route-derived UI state into a reusable layout state helper. Previously, multiple sidebar visibility and layout conditions were derived directly within the component, making future navigation-related enhancements more difficult to maintain.

The updated implementation introduces a dedicated layout state computation flow and memoizes derived values to reduce unnecessary recalculations during navigation changes.

Key Improvements

• Centralized sidebar and layout state derivation
• Consolidated route-based visibility logic into a reusable helper
• Reduced scattered state computation within the component
• Added memoized layout state generation using useMemo
• Improved maintainability for future navigation and workspace features
• Established a more scalable foundation for sidebar-related enhancements

Impact

This refactor improves consistency across sidebar interactions while reducing maintenance complexity. The centralized layout state approach makes future navigation, workspace, and sidebar integrations easier to implement and maintain.

🎯 Type of Change

• ♻️ Refactoring
• ⚡ Performance Improvement

✅ Testing

• Verified sidebar visibility behavior on public routes
• Verified sidebar visibility behavior on insights routes
• Verified standard application routes continue rendering correctly
• Verified top navigation behavior remains unchanged
• Confirmed layout spacing and rendering are preserved
• Confirmed route transitions update layout state correctly

Fixes #219

Expected Labels

level3 NSoC'26

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[github-actions]

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