Function render_form_with 

pub fn render_form_with(
    f: &mut Frame<'_>,
    area: Rect,
    state: &FormState,
    style: &FormStyle,
    errors: &[(String, String)],
    theme: &Theme,
)

Render a form with explicit style options and per-field errors.

errors is a slice of (field_id, message) pairs. A given error is rendered only if field_id is in state.touched — so newly-opened fields do not flash errors before the user has a chance to type.