[FEATURE] "Stash" input to temporarily park a half-written prompt

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

## Problem

When writing a prompt in Claude Code's input field, there's no way to temporarily
save it, run a different command, and then come back to it.

Current workarounds are all friction-heavy:

• Cmd+A selects the entire terminal window, not just the input field
• Ctrl+U / Ctrl+K cut to the terminal kill buffer (not the system clipboard),

and are easy to accidentally overwrite

• Mouse-selecting the input text and copying manually works but is fiddly
• Opening a second terminal tab is the most reliable workaround but requires

extra context switching

Proposed Solution

## Proposed Solution

A "stash input" keyboard shortcut (analogous to git stash) that:

1. Saves the current in-progress prompt to a temporary buffer
2. Clears the input so you can type and submit something else
3. Restores the stashed prompt with a second shortcut ("unstash")

A single-level stash (last stash wins) would cover the majority of use cases.

Alternative Solutions

## Simpler Alternative

Fix Cmd+A (or provide an equivalent shortcut) to select only the text in the
active input field rather than the entire terminal window.

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

This is a natural part of the writing flow — you're mid-thought on a complex
prompt, remember you need to check something first, and want to briefly
context-switch without losing your work. Right now there's no clean way to do it.

Additional Context

_No response_