refactor(pages): migrate app data reads to api adapters

lib/api/transactions.ts

@@ -1,5 +1,5 @@
-import { mockTransactions } from "@/lib/mock"
+import { useWalletStore } from "@/store/wallet"
 
 export function listTransactions() {
-  return mockTransactions
+  return useWalletStore.getState().transactions
 }