[Bug] Command+Left/Right Arrow navigates to document boundary instead of line boundary

Bug Description
Pressing Command Left Arrow or Right Arrow used to go to the start of the current line or the end of the current line. Now it goes all the way to the start or end of all text typed. That is a serious loss in productivity.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.116
• Feedback ID: 9d2dc85d-7c34-4adc-ab7e-43bf9deffbed

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/porterbayne/.local/share/claude/versions/2.1.116 (expected in multi-process scenarios)\n    at jl_ (/$bunfs/root/src/entrypoints/cli.js:2752:2177)\n    at B88 (/$bunfs/root/src/entrypoints/cli.js:2752:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T22:47:46.749Z"}]