The very basic client app, not adapted for mobiles.

client/internal/services/core/mainwindow/tabs.go

@@ -0,0 +1,14 @@
+package mainwindow
+
+import (
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/lang"
+)
+
+func (m *mainWindow) AddTab(tab *container.TabItem) {
+	if len(m.tabs.Items) == 1 && m.tabs.Items[0].Text == lang.L("window.lorem_ipsum.tab_name") {
+		m.tabs.Remove(m.tabs.Items[0])
+	}
+
+	m.tabs.Append(tab)
+}