• Redesigned settings with dark theme and heart rate calculation modes
• New adaptive percentile algorithm for more accurate RHR calculation
• Migrated settings storage from SharedPreferences to reliable database
• Added multi-manufacturer heart rate sync (Garmin, Polar, Xiaomi, more)
• Enhanced charts with better scaling, aspect ratio, and grid lines
• Fixed German translations and various UI/interface issues
• Improved app architecture for better performance and stability
• Restored sleep time validation with sensible defaults
• Fixed duplicate database sync and settings dialog issues
