Non-markdown text files (.yml, .yaml, .json, etc.) are already forced into raw editor mode via effectiveRawMode. This hides the Raw toggle button in the breadcrumb bar for those files since toggling is not applicable. Adds tests for classify_file_kind and forceRawMode behavior. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>