- app.py: add _resolve_env and _resolve_spec_env_vars to replace
{ENV_VAR} patterns (e.g. {AUTH_SERVER}) with os.environ values
so the frontend receives resolved URLs via /openapi.json
- app.py: add _resolve_env and _resolve_spec_env_vars to replace
{ENV_VAR} patterns (e.g. {AUTH_SERVER}) with os.environ values
so the frontend receives resolved URLs via /openapi.json