sync: phase 1 backend + frontend from server

web/src/stores/layout.ts

@@ -0,0 +1,11 @@
+import { create } from 'zustand';
+
+interface LayoutState {
+  isDM: boolean;
+  setDM: (value: boolean) => void;
+}
+
+export const useLayoutStore = create<LayoutState>((set) => ({
+  isDM: false,
+  setDM: (value) => set({ isDM: value }),
+}));