[FEATURE] Allow sending the suggested placeholder text with Enter/click when input is empty

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

After Claude responds, the chat input box sometimes pre-fills a grey placeholder text suggesting what the user might want to reply next. However, if the input is left empty, the send button stays disabled, so there's no way to submit that suggested text directly — the user has to manually retype (can not copy-paste) the exact same text into the input box before they can send it. This is an unnecessary extra step whenever the suggestion already matches what the user wants to say.

Proposed Solution

When the input box is empty but a suggested placeholder is currently displayed, allow the user to submit that placeholder text as the message by pressing Enter or clicking the send button — instead of keeping send disabled purely because the literal input value is empty. Optionally, clicking directly on the placeholder text itself could also populate it into the real input field so the user can review/edit before sending.

Alternative Solutions

• Make the placeholder text clickable so it fills the input box with the suggested text (still requires a manual Enter/click to send afterward, but at least avoids retyping).
• Add a small "Use suggestion" button next to the input box that inserts the placeholder text into the field.

Priority

Low - Nice to have

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_