TianshangPeriodPal v2.0.0

TianshangPeriodPal v2.0.0

🔐 Security

• SQLCipher AES-256 database encryption with Android Keystore
• Encrypted backups (AES-256-GCM)
• Argon2id password hashing
• Fixed bottom navigation bypass on AppLock screen
• Lifecycle-based background lock

🧠 Prediction Algorithm Optimization

• Luteal phase learning from historical ovulation data
• Exponential decay weighting (recent cycles prioritized)
• IQR filtering for period length outliers
• Expanded ovulation adjustment range
• Dynamic cycle length bounds (21-45 days)

🎨 UI Improvements

• ProfileScreen reorganized with section headers (Appearance/Data/Other)
• Removed duplicate security items (moved to Settings)
• HSL color engine for theme customization

📝 Documentation

• Updated README with security architecture
• Added prediction algorithm documentation
• Fixed language count (7 languages)

📦 Downloads

• PeriodPal-v2.0.0.apk - Release APK (debug signed)