Phase 3: scaffold Manager Dashboard — all pages, layout, routing

Includes: LoginPage (PIN pad), DashboardPage (30s polling table grid),
OrderDetailPage (full actions), ProductsPage (CRUD + printer zone),
WaitersPage (block/reset PIN/delete), TablesPage, ReportsPage
(shift summary + order history + CSV export), SettingsPage (printers
+ test print + sysadmin lock/unlock). TailwindCSS, React Query,
react-hot-toast. Docker Compose service on port 5174.

manager_dashboard/src/store/authStore.js

@@ -0,0 +1,18 @@
+import { create } from 'zustand'
+
+const useAuthStore = create((set) => ({
+  user: null,
+  token: localStorage.getItem('token') || null,
+
+  login(user, token) {
+    localStorage.setItem('token', token)
+    set({ user, token })
+  },
+
+  logout() {
+    localStorage.removeItem('token')
+    set({ user: null, token: null })
+  },
+}))
+
+export default useAuthStore