revert ctrl+d - conflicts with page down

packages/tui/internal/components/chat/editor.go

@@ -124,11 +124,6 @@ func (m *editorComponent) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 					return nil
 				}
 			}
-		case "ctrl+d":
-			if m.textarea.Value() != "" {
-				return m, nil
-			}
-			return m, tea.Quit
 		case "shift+enter":
 			value := m.textarea.Value()
 			m.textarea.SetValue(value + "\n")