Phase 2

Base app architecture:

    Route groups for customer, staff and owner.
* Reusable design system with around 20 UI components.
* Complete Prisma schema.
* Authentication with email/password and Google.
* Role and permission model.
* Protected routes.
* Clean separation between features, services, components and shared utilities.

src/lib/utils/cn.ts

@@ -0,0 +1,10 @@
+import { clsx, type ClassValue } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+/**
+ * Merge Tailwind class lists safely — later classes win over earlier ones
+ * for the same utility group (e.g. `cn("px-4", condition && "px-6")`).
+ */
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}