fix(projects): make freshly-added projects editable

Make workspace-less projects flow through aggregated project fetching and keep the settings screen editable immediately after adding one.

packages/app/src/hooks/use-sidebar-workspaces-list.ts

@@ -169,7 +169,7 @@ export function useSidebarWorkspacesList(options?: {
       void (async () => {
         const next = new Map<string, WorkspaceDescriptor>();
         try {
-          const workspaces = await fetchAllWorkspaceDescriptors({
+          const { workspaces, emptyProjects } = await fetchAllWorkspaceDescriptors({
             client,
             sort: [{ key: "activity_at", direction: "desc" }],
           });
@@ -181,6 +181,9 @@ export function useSidebarWorkspacesList(options?: {
           }
           const store = useSessionStore.getState();
           store.setWorkspaces(serverId, next);
+          // Keep parents with no workspaces yet, so a manual refresh doesn't drop
+          // a freshly-added project from the sidebar.
+          store.setEmptyProjects(serverId, emptyProjects);
           store.setHasHydratedWorkspaces(serverId, true);
         } catch (error) {
           console.error("[WorkspaceFetch][sidebar-refresh] failed", {