refactor(data): add mock API adapters, id utility, and toast feedback

lib/toast.ts

@@ -0,0 +1,9 @@
+import { toast } from "sonner"
+
+export function notifySuccess(message: string) {
+  toast.success(message)
+}
+
+export function notifyInfo(message: string) {
+  toast(message)
+}