[FEATURE] Allow adding a comment when selecting a valid option in single-select prompts

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

When Claude Code presents an interactive proposal with multiple options (single-select), there is no way to select a valid proposed option AND attach an additional comment or refinement to it. This is particularly noticeable in the VS Code extension.

Currently, the only way to add any extra context is to pick "Other," which discards the proposed option entirely and forces the user to manually retype the whole solution plus their comment - duplicating work that was already done by the accepted option.

Example: Claude proposes options A, B, and C. Option B is essentially correct but needs a small adjustment. Right now the user must either accept B as-is, or select "Other" and rewrite B from scratch along with the tweak.

Proposed Solution

Add an optional comment/note field alongside single-select options, so a user can pick a valid proposed option while attaching a short refinement - without having to fall back to "Other" and losing the already-correct proposal.

Alternative Solutions

The current workaround is to select "Other" and manually retype the full accepted solution together with the additional comment, which duplicates effort every time.

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

In VS Code, Claude Code proposes options A, B, C for how to proceed. Option B is the right approach, but I'd also like to note a small tweak (e.g. "also handle edge case X"). Today I have to pick "Other" and retype B plus the tweak myself. With this feature, I could pick B directly and add my note in a comment field, saving the retyping.

Additional Context

_No response_