bug: onboarding can skip project import and uses the wrong payload when adding a local project

[sauravpanda]

Summary

The onboarding flow has two concrete problems: skipping GitHub auth also skips the project-import step, and the project-import action sends the wrong parameter name.

Evidence

• In src/components/OnboardingWizard.tsx lines 145-153, pressing Skip on the GitHub step jumps straight to done instead of continuing to the project step.
• In src/components/OnboardingWizard.tsx lines 65-75, register_local_project is invoked with { path }.
• The Rust command expects local_path in src-tauri/src/projects.rs lines 166-205.
• Elsewhere the app consistently uses localPath for the same command in src/hooks/useProjects.ts lines 52-63.

Impact

New users can finish onboarding without ever adding a project, and the explicit add-project action is likely to fail because it does not match the command contract.

Suggested fix

• Always continue to the project step unless the user explicitly dismisses onboarding.
• Align the invoke payload with the backend contract.
• Add a basic onboarding flow test that covers both the authenticated and skipped-auth paths.