Set up basic project structure

frontend/src/ui/state.ts

@@ -0,0 +1,13 @@
+import { create } from "zustand";
+
+type Page = "login" | "register" | "chat"
+
+interface AppState {
+    currentPage: Page;
+    setCurrentPage: (page: Page) => void;
+}
+
+export const useAppState = create<AppState>((set) => ({
+    currentPage: "login", // default page
+    setCurrentPage: (page: Page) => set({ currentPage: page })
+}));