keybindingFlavor stops doing anything in Claude Code, and word-editing keys move to Bash semantics

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2.1.261 changed the prompt's word-editing keys to match Bash: Ctrl+W deletes back to whitespace, Alt+F and Alt+D stop at word end, and punctuation separates words. The release states keybindingFlavor no longer has any effect, so a settings file pinning it is now dead config. If your muscle memory was on the Emacs-style word boundaries, Ctrl+W now eats a whole path segment rather than stopping at a slash.