Improve topic sorting: add popular sorting by publications and authors count

docs/api.md

@@ -0,0 +1,40 @@
+
+
+## API Documentation
+
+### GraphQL Schema
+- Mutations: Authentication, content management, security
+- Queries: Content retrieval, user data
+- Types: Author, Topic, Shout, Community
+
+### Key Features
+
+#### Security Management
+- Password change with validation
+- Email change with confirmation
+- Two-factor authentication flow
+- Protected fields for user privacy
+
+#### Content Management
+- Publication system with drafts
+- Topic and community organization
+- Author collaboration tools
+- Real-time notifications
+
+#### Following System
+- Subscribe to authors and topics
+- Cache-optimized operations
+- Consistent UI state management
+
+## Database
+
+### Models
+- `Author` - User accounts with RBAC
+- `Shout` - Publications and articles
+- `Topic` - Content categorization
+- `Community` - User groups
+
+### Cache System
+- Redis-based caching
+- Automatic cache invalidation
+- Optimized for real-time updates