**Motivations:**
- Authors were not being loaded from cache, causing 'Aucun contenu trouvé' message even when authors exist
- useArticles only loaded articles from Nostr subscription, not authors from cache
- Authors should be loaded from cache first (cache-first architecture)
**Root causes:**
- useArticles hook only subscribed to articles from Nostr, not loading authors from cache
- No method to get all authors from cache
- Authors were only extracted from articles returned by subscription, which may not include author presentations
**Correctifs:**
- Added getAll method to objectCache to retrieve all objects of a type from cache
- Modified useArticles to load authors from cache on startup before subscribing to Nostr
- Authors are now loaded from cache and merged with articles from subscription
- totalSponsoring is calculated for each author when loading from cache
**Evolutions:**
- Authors are now available immediately from cache on page load
- Better user experience: no 'Aucun contenu trouvé' when authors exist in cache
- Cache-first architecture: authors loaded from cache before Nostr subscription
**Pages affectées:**
- lib/objectCache.ts
- hooks/useArticles.ts
