Replace the outdated React/Vite/8080/H2 README with an accurate, shielded
overview: Spring Boot 3.4 / Java 21 Thymeleaf SSR, the collection→discovery→
curation→rework→publish pipeline, subtitle studio (Whisper+ffmpeg), light/dark
UI, getting-started, env vars, and project structure.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
