Fix split-divider-color Ghostty option in cmux#758

lawrencecchen wants to merge 2 commits intomainmanaflow-ai/cmux:mainfrom

task-split-divider-color-ghostty-option-doesnt-work-in-cmuxmanaflow-ai/cmux:task-split-divider-color-ghostty-option-doesnt-work-in-cmuxCopy head branch name to clipboard