fix(desktop): preserve sidebar groups on reload

apps/desktop/src/stores/connectionStore.ts

@@ -4926,9 +4926,10 @@ export const useConnectionStore = defineStore("connection", () => {
         const saved = await api.loadConnections();
         connections.value = saved.map(normalizeConnection);
         const savedLayout = await api.loadSidebarLayout();
+        const currentLayout = sidebarLayout.value.groups.length || sidebarLayout.value.order.length ? sidebarLayout.value : null;
         sidebarLayout.value = reconcileLayout(
           connections.value.map((c) => c.id),
-          savedLayout,
+          savedLayout ?? currentLayout,
         );
         rebuildTreeNodes();
       })().finally(() => {