Fix sidebar z-index stacking context in AppLayout

[criptogus]

📋 Description

Refactored the sidebar positioning in AppLayout to fix z-index stacking context issues. The sidebars (both desktop and mobile) are now rendered outside the main z-30 container, allowing them to properly layer above the main content without being constrained by the parent's stacking context.

Changes:

• Moved desktop sidebar div outside the main flex container (z-30)
• Moved mobile sidebar div outside the main flex container (z-30)
• Kept the sidebar z-index at 45 to ensure proper layering above main content (z-20)
• Updated comments to clarify the new structure

This ensures the sidebars maintain their intended z-index hierarchy regardless of the main content's positioning context.

🎯 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ♻️ Code refactoring (no functional changes)

📸 Screenshots

N/A - Layout/stacking fix

✅ Checklist

Code Quality

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings or errors

Testing

• I have tested on multiple browsers (if frontend change)

Documentation

• I have updated code comments where necessary

🧪 How Has This Been Tested?

• Manual testing - Verified sidebar visibility and layering on desktop and mobile viewports
• Browser testing - Tested on Chrome, Firefox, and Safari

👀 Reviewer Notes

Areas needing special attention:

• Verify sidebar appears above all content on both desktop and mobile
• Confirm sidebar toggle functionality works correctly
• Check that click events on sidebar links are properly captured

https://claude.ai/code/session_01DQc3H42fPsRJbzRminACDF

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