v1.5.0

� Audio Library Release v1.5.0

Major new feature: Complete Audio Library with TTS integration

Key Features:
• Text-to-Speech with OpenAI & ElevenLabs support
• Professional audio player with full controls
• Automatic audio generation on chapter save
• Background processing with status tracking
• Secure local audio file serving
• Enterprise-grade security implementation

This release adds comprehensive audio capabilities to Writegeist,
allowing users to listen to their chapters as high-quality audio.

Production-ready with full security audit completed.