Migrate Most Recent activity local storage to App State persistence (#1967)

* Rewrite MostRecentActivity to leverage AppStatePersistenceUtility.

* Fix format. Update type enum.

* Migrate Item enum to string enum

* Fix unit tests

* Fix build issue

src/Shared/AppStatePersistenceUtility.ts

@@ -3,6 +3,7 @@ import { LocalStorageUtility, StorageKey } from "Shared/StorageUtility";
 // The component name whose state is being saved. Component name must not include special characters.
 export enum AppStateComponentNames {
   DocumentsTab = "DocumentsTab",
+  MostRecentActivity = "MostRecentActivity",
   QueryCopilot = "QueryCopilot",
 }
 
@@ -34,6 +35,7 @@ export const loadState = (path: StorePath): unknown => {
   const key = createKeyFromPath(path);
   return appState[key]?.data;
 };
+
 export const saveState = (path: StorePath, state: unknown): void => {
   // Retrieve state object
   const appState =
@@ -65,6 +67,10 @@ export const deleteState = (path: StorePath): void => {
   LocalStorageUtility.setEntryObject(StorageKey.AppState, appState);
 };
 
+export const hasState = (path: StorePath): boolean => {
+  return loadState(path) !== undefined;
+};
+
 // This is for high-frequency state changes
 let timeoutId: NodeJS.Timeout | undefined;
 export const saveStateDebounced = (path: StorePath, state: unknown, debounceDelayMs = 1000): void => {

src/Shared/StorageUtility.ts

@@ -24,7 +24,7 @@ export enum StorageKey {
   MaxDegreeOfParellism,
   IsGraphAutoVizDisabled,
   TenantId,
-  MostRecentActivity,
+  MostRecentActivity, // deprecated
   SetPartitionKeyUndefined,
   GalleryCalloutDismissed,
   VisitedAccounts,