enforce membership feature access in api and surface plans in admin

apps/admin/src/lib/membership/access.ts

@@ -0,0 +1,26 @@
+import { getDatabase } from "@/lib/database";
+import { getMembershipFeatures } from "./features";
+
+export async function getUserMembershipContext(userId: string): Promise<{
+  membershipType: "basic" | "premium" | "vip";
+  features: ReturnType<typeof getMembershipFeatures>;
+}> {
+  const db = await getDatabase();
+  const user = await db.getUserById(userId);
+
+  if (!user || user.role !== "client") {
+    const membershipType = "vip" as const;
+    return {
+      membershipType,
+      features: getMembershipFeatures(membershipType),
+    };
+  }
+
+  const client = await db.getClientByUserId(userId);
+  const membershipType = client?.membershipType ?? "basic";
+
+  return {
+    membershipType,
+    features: getMembershipFeatures(membershipType),
+  };
+}