[FEATURE] Option to disable Up/Down arrow input history recall in VS Code extension

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

Up/Down arrows in the VS Code extension chat input recall previous messages when the cursor reaches the top or bottom of the input.

Proposed Solution

Add a VS Code extension setting like claudeCode.inputHistoryNavigation that controls whether Up/Down arrow keys trigger history recall at the input boundary. When disabled, Up/Down should only move the cursor within the text.

Alternative Solutions

No workaround exists. The behavior is not exposed via any setting or configuration.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

Writing a multiline prompt in the VS Code extension chat input, pressing Up to navigate within the text, and accidentally recalling a previous message - losing what I was typing.

Additional Context

_No response_