Fix MegaMenu dropdown not appearing on click

[Copilot]

Problem

The MegaMenu component was not dropping down when users clicked on navigation items with mega menu content (Solutions, Use Cases, Insights, AI, etc.). This was a regression from a previous update that broke the dropdown functionality completely.

Root Cause

The issue was in the MegaMenu.tsx component's early return condition that was overly restrictive:

// Problematic code
if (!isOpen || !position || !content?.items?.length) {
  return null;
}

This created a chicken-and-egg problem:

1. When a user clicks a nav item, isOpen becomes true immediately
2. The position calculation happens in a useEffect that runs after the render attempt
3. Since position is null initially, the component returns null and never renders
4. Without rendering, the useEffect that calculates position never runs
5. Result: MegaMenu never appears

Solution

1. Removed position dependency from early return condition:

// Fixed code
if (!isOpen || !content?.items?.length) {
  return null;
}

2. Added fallback positioning in render:

style={{
  // ... other styles
  top: position ? `${position.top}px` : '80px', // Fallback to header height
  // ... other styles
}}

Impact

✅ MegaMenu now drops down immediately when navigation items are clicked
✅ No breaking changes to existing functionality
✅ Maintains all accessibility features and keyboard navigation
✅ Preserves proper positioning once calculated
✅ All existing tests continue to pass

The fix is minimal and surgical - it only changes the rendering logic to allow the component to render while position is being calculated, with a sensible fallback position that gets updated once the proper position is computed.

 *Screenshot shows the navigation before the fix where clicking menu items would not show dropdowns*

Testing

• ✅ Build passes successfully
• ✅ Logic validated with comprehensive test scenarios
• ✅ No regressions introduced
• ✅ Component API unchanged

The MegaMenu will now work as expected, dropping down smoothly when users interact with navigation items that have mega menu content.

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