chore(core): update local storage key for v4

Update local storage key to prevent conflicts between v3 and v4 persisted state.
This ensures users upgrading from v3 to v4 will start with fresh state rather
than potentially incompatible stored data.

packages/use-wallet/src/store.ts

@@ -35,7 +35,7 @@ export const DEFAULT_STATE: State = {
 
 export type PersistedState = Omit<State, 'algodClient' | 'managerStatus' | 'networkConfig'>
 
-export const LOCAL_STORAGE_KEY = '@txnlab/use-wallet:v3'
+export const LOCAL_STORAGE_KEY = '@txnlab/use-wallet:v4'
 
 // State mutations