Kudzu 0.9.2 prevents pre-0.8.53 applications from silently producing an unstyled deploy after upgrading to route-aware CSS ownership.
- Preserve source CSS globally when no route imports CSS and config.styles is empty.
- Emit fallback styles in deterministic source-relative path order.
- Print an actionable migration warning.
- Leave explicit route and configured global CSS behavior unchanged.
- Add no browser JavaScript to static routes.
Validation: 254/254 tests, required-Chrome CI, Node 22 CI, and fresh package smoke.