Under the hood
Headless startup's fastMode and advisor settings sync moved into shared helper functions
**What
When Claude Code starts up in headless mode (--print, used for non-interactive/programmatic use), the code that syncs fastMode and advisor-related settings has been moved out of inline logic into two dedicated functions, one of which adds a new settings subscription.
**Why
This is an internal restructuring of startup code; it doesn't change what settings are available or how fast mode behaves.