v1.9.0

✨ Features

• Hide posts from index: New is_listed toggle on each post. Uncheck to hide from blog index, homepage, category/tag pages, and RSS feed. Post remains accessible via direct URL and series pages.
• Hide series from index: New show_on_index toggle on each series. Uncheck to hide all posts in the series from the index. Individual posts can override this with their own is_listed toggle.
• Gravatar on author profile: Added gravatar_url accessor on User model for automatic avatar display on author pages.
• Author view improvements: Enhanced author bio, author info, and series authors components for better display.