- CSRF: hint uses VITE_BACKEND_PORT instead of hardcoded 8080
- Proxy: add /swagger to Vite dev server for Swagger doc.json (fixes YAMLException)
- playerService: validate media URL before load to avoid Invalid URI errors
- usePlayer: log invalid URL/network audio errors at DEBUG level
- SwaggerUI: log HTML-instead-of-JSON parse errors at DEBUG
- webhookService: log 5xx backend errors at DEBUG
- api client: log 5xx /webhooks errors at DEBUG (reduces duplicate noise)
Co-authored-by: Cursor <cursoragent@cursor.com>
