Old-project v0.6 test checklist

The unmodified old application builds before migration.
wrnexus update --dry-run --report changes no files.
The report identifies legacy outputs, ambiguous functions, unresolved imports, and string layouts.
The real migration creates a backup.
Migrated .wrn files parse and type-check.
$emit is converted to output.* where safe.
@event is converted to outputs {}.
Parent event.detail handlers use payload.
Explicit imports resolve without guessing ambiguous components.
Existing layouts render.
SSR and CSR behavior match the old application.
A second migration run produces no source changes.
Rollback restores the exact pre-migration application.