Fix 403 loopback gate and HF_HOME writable cache error

Definitive fix: patch all 3 API URL sources for Docker same-origin serving

Fix API URL: use bun script for reliable placeholder replacement

Fix API URL with placeholder+sed approach for Docker deployment

Fix API URL: use window.location.origin for Docker deployment

Fix CORS and bind host for HF Spaces

Deploy full OmniVoice Studio UI via Docker