fix: plane icon now shows for offline-created highlights

- Add useEffect to watch highlight.isOfflineCreated prop changes
- State now updates when prop changes (not just on initial mount)
- Add isOfflineCreated to console log for easier debugging
- Fixes issue where plane icon wouldn't appear for new offline highlights

The bug was that showOfflineIndicator state was only set once during
component initialization. If the highlight prop didn't have isOfflineCreated
set at that moment, the icon would never appear even if the prop changed later.

src/hooks/useHighlightCreation.ts

@@ -73,6 +73,7 @@ export const useHighlightCreation = ({
       console.log('✅ Highlight created successfully!', {
         id: newHighlight.id,
         isLocalOnly: newHighlight.isLocalOnly,
+        isOfflineCreated: newHighlight.isOfflineCreated,
         publishedRelays: newHighlight.publishedRelays
       })