## Why
Background helpers launched from a detached Windows process can allocate console windows. Job Object launches and containment fallbacks need to preserve console suppression as well.
## What changed
- Add `codex_utils_process::background_command` to set `CREATE_NO_WINDOW` on Windows, and use it across background subprocess launches, including Git, plugins, authentication, diagnostics, and sandbox helpers.
- Centralize console suppression in Job Object launches. Keep `CREATE_NO_WINDOW` when retrying without containment, and clear `CREATE_SUSPENDED` so the fallback child can run.
- Preserve console inheritance for interactive shell launches and interactive AWS authentication refreshes.
## Testing
Add Windows regression tests covering console-free launches from detached parents through standard and Tokio commands, stdout/stderr capture, successful containment, Job Object creation and assignment failures, and sandbox setup refresh helpers.
GitOrigin-RevId: b2c238fa7d4f9fbd868e5adf7d4be9958ff01e6c
## Why
Background marketplace and plugin refreshes can otherwise inherit repository-local or command-scoped Git configuration from the project that launched Codex. That configuration can redirect remotes or invoke Git helpers during an automatic operation.
## What changed
- Run automatic marketplace upgrades, plugin cache refreshes, and curated marketplace lookups with repository-scoped Git environment variables removed and a temporary trusted repository under the Codex home.
- Carry the automatic/manual trust mode through marketplace upgrades and plugin materialization.
- Preserve the caller's Git configuration for explicit marketplace upgrades, plugin installs, and refreshes.
## Testing
- Add regression coverage for repository URL rewrites, protocol helpers, command-scoped configuration, and manual Git filters.
GitOrigin-RevId: 957f45fa3bd7ce7e1b83355f276cf65dc5e99c8e
Eric Traut