Function render 

pub fn render(
    app: &App,
    f: &mut Frame<'_>,
    area: Rect,
    title: &str,
    rows: &[IssueRow],
)

Draw rows as a flat, hoverable, clickable table under a bordered title.

A hovered row is highlighted and records one Action::OpenIssue region per row, so a click opens the issue exactly like a card on the board. An empty list renders a short “No issues.” line rather than an empty box.