fix: crash when no groups defined and opening the group panel

src/cmd/tui/tui_groups.go

@@ -89,6 +89,10 @@ func newModel() mainModel {
 	p.PerPage = cap * lines
 	p.SetTotalPages(len(content))
 
+	if len(content) == 0 {
+		content = append(content, "No groups found")
+	}
+
 	m := mainModel{content: content, paginator: p}
 	return m
 }
@@ -138,7 +142,11 @@ func (m mainModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	}
 
 	// Adrian is a fucking genius thanks for the idea :)
+	if m.index == 0 {
+		m.paginator.Page = 0
+	} else {
 		m.paginator.Page = m.index / (cap * lines)
+	}
 	cmds = append(cmds, cmd)
 
 	return m, tea.Batch(cmds...)