Add guest cart drawer, Continue handoff, and shared customer login.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/api.ts

@@ -195,6 +195,22 @@ export async function getCategoryBySlug(slug: string) {
   return categories.find((category) => category.slug === slug) ?? null;
 }
 
+export type ApiTenant = {
+  id: string | number;
+  name: string;
+  nameFa?: string | null;
+  slug?: string;
+  domain?: string;
+};
+
+export async function getTenant() {
+  try {
+    return await apiGet<ApiTenant>(`/tenants/${API.domain}`);
+  } catch {
+    return null;
+  }
+}
+
 export async function getComments(entityType: "product" | "blog", entityId: string) {
   try {
     const data = await apiGet<{ items: ApiComment[] }>(`${tenant()}/comments`, { entityType, entityId });