Update 5 cmd/ test utilities that referenced APIs that drifted after
bridge refactors (NewBrowserAuthManager, bridge.NewConfig, changed
function signatures). Rewrite test-kosmi and test-native to use
NewGraphQLWSClient directly. Export LoginWithChromedp for use by cmd
scripts. Fix redundant-newline vet warnings across 5 cmd/ files.
Remove unreachable code and replace deprecated ioutil calls in
bridge/helper/lottie_convert.go.
Made-with: Cursor
