app: use session_working helper to simplify loading states (#27212)

packages/app/src/pages/layout/sidebar-items.tsx

@@ -166,9 +166,7 @@ export const SessionItem = (props: SessionItemProps): JSX.Element => {
   })
   const isWorking = createMemo(() => {
     if (hasPermissions()) return false
-    // This matches how the TUI does it
-    const status = sessionStore.session_status[props.session.id]
-    return status?.type === "busy" || status?.type === "retry"
+    return sessionStore.session_working(props.session.id)
   })
 
   const tint = createMemo(() => messageAgentColor(sessionStore.message[props.session.id], sessionStore.agent))

packages/app/src/pages/layout/sidebar-project.tsx

@@ -305,7 +305,7 @@ export const SortableProject = (props: {
   const isWorking = createMemo(() =>
     dirs().some((directory) => {
       const [store] = globalSync.child(directory, { bootstrap: false })
-      return Object.values(store.session_status).some((status) => status?.type === "busy" || status?.type === "retry")
+      return Object.keys(store.session_status).some((id) => store.session_working(id))
     }),
   )
   const projectSessions = createMemo(() => sortedRootSessions(projectStore(), props.sortNow()))