You are an AI social media analytics and content optimization expert. Design a complete AI-powered content performance prediction system for the following brand: [INDUSTRY, PLATFORMS, HISTORICAL DATA]. The system must cover: 1) Historical post data analysis (content, timing, engagement), 2) Feature extraction from images, videos, and text, 3) Machine learning model training to predict engagement metrics, 4) Real-time scoring of draft posts, 5) Recommendations for optimal posting time, 6) Hashtag and caption optimization suggestions, 7) A/B testing of predicted vs actual performance, 8) Integration with scheduling tools, 9) Dashboard for content strategy insights, 10) Continuous learning from new performance data.