fix(sidebar): persist sidebar state across page navigation

- Move `isSidebarOpen` state from local component (`useState`) to global Zustand store (`ui-store.ts`).
- Fix an issue where the sidebar would incorrectly reset to its default closed state when navigating between routes (e.g., to the Telemetry page) due to component remounting.
- Ensure consistent sidebar toggle behavior across the entire dashboard application.

apps/web/src/store/ui-store.ts

@@ -1,12 +1,18 @@
-import { create } from 'zustand';
+import { create } from "zustand";
 
 type UiState = {
   dashboardCompact: boolean;
   toggleDashboardCompact: () => void;
+
+  isSidebarOpen: boolean;
+  setIsSidebarOpen: (isOpen: boolean) => void;
 };
 
 export const useUiStore = create<UiState>((set) => ({
   dashboardCompact: false,
   toggleDashboardCompact: () =>
     set((state) => ({ dashboardCompact: !state.dashboardCompact })),
+
+  isSidebarOpen: false,
+  setIsSidebarOpen: (isOpen: boolean) => set({ isSidebarOpen: isOpen }),
 }));