[Feature Request] Add prompt history/undo functionality for multiline input

Bug Description
I was writting prompt. Multiline. A lot of things i ment on this. But i fucked-up and idk which hotkey i used, but after that i was see clean input. And no way to get my prompt again. Arrows did not help. Only one thing i can do now: write all prompts in external editor cause they dont fucked up me like this. Never.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.117
• Feedback ID: 844f4f0d-9d74-43c2-877a-012cbc428f70

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/posokhinsvyatoslav/.local/share/claude/versions/2.1.117 (expected in multi-process scenarios)\n    at fn_ (/$bunfs/root/src/entrypoints/cli.js:2754:2177)\n    at H98 (/$bunfs/root/src/entrypoints/cli.js:2754:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T09:08:58.912Z"}]