## Why
Trusting a directory enables project-local config, hooks, and exec policies, which can increase exposure to prompt injection. Require an explicit decision instead of automatically trusting projects whose trust level is unset.
## What changed
- Add a directory-trust step to TUI onboarding, with options to trust and continue or quit.
- Apply trust to the Git repository root when starting from a subdirectory, persist the decision, and reload config before continuing.
- Keep the prompt active and show the config error when trust cannot be persisted. Skip the prompt for remote workspaces and projects with an explicit trust level.
## Testing
- Cover trust-screen rendering, keyboard selection, persistence failures, and prompt visibility for explicit trust and Windows sandbox states.
GitOrigin-RevId: 850e6f54aec84d584cd161348ecdb1da89aaabd4
17801b4206