Frontend features & security updates

📝 Content & Editing

• Added Public API key management with UI to create, copy, and revoke keys
• Advanced list formatting in the editor (numbering, restarts, styles, markers)
• Improved image handling and asset URL management in the editor

🧹 Moderation

• Added improved moderation tools for public content and introduced indexed moderation views for faster review

🐛 Fixes

• Fixed OAuth and authentication edge cases
• Prevented unnecessary re-authorisation when sessions already exist
• Added YouTube URL support for embedded frames

🔐 Security

• Shipped various security improvements

🎨 Various UI improvements