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

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

components/ProductTabs.tsx

@@ -1,9 +1,10 @@
 "use client";
 
-import { useEffect, useState, type FormEvent } from "react";
+import { useState, type FormEvent } from "react";
 import type { ApiComment } from "@/lib/api";
 import { formatDate } from "@/lib/format";
-import { SITE } from "@/lib/site";
+import { customerLoginUrl } from "@/lib/customer";
+import { useSession } from "@/lib/session";
 import { RichContent } from "./RichContent";
 
 type Props = {
@@ -23,26 +24,13 @@ const tabs: Tab[] = [
   { id: "comments", fa: "نظرات", en: "Comments" },
 ];
 
-function readToken() {
-  if (typeof window === "undefined") return "";
-  return (
-    window.localStorage.getItem("accessToken") ||
-    window.localStorage.getItem("meshkee_access_token") ||
-    ""
-  );
-}
-
 export function ProductTabs({ productId, descriptionHtml, comments: initialComments }: Props) {
   const [tab, setTab] = useState<"description" | "comments">("description");
   const [comments, setComments] = useState(initialComments);
   const [sent, setSent] = useState(false);
   const [sending, setSending] = useState(false);
-  const [loggedIn, setLoggedIn] = useState(false);
-  const authorName = "کاربر";
-
-  useEffect(() => {
-    setLoggedIn(Boolean(readToken()));
-  }, []);
+  const { isAuthenticated: loggedIn, user } = useSession();
+  const authorName = user?.firstName?.trim() || "کاربر";
 
   async function onSubmit(event: FormEvent<HTMLFormElement>) {
     event.preventDefault();
@@ -157,7 +145,7 @@ export function ProductTabs({ productId, descriptionHtml, comments: initialComme
               <div className="rounded-xl bg-zinc-50 px-4 py-5 text-center">
                 <p className="text-sm text-zinc-600">برای ثبت نظر ابتدا وارد حساب کاربری شوید.</p>
                 <a
-                  href={SITE.customerUrl}
+                  href={customerLoginUrl("/")}
                   className="mt-3 inline-block text-sm text-brand"
                 >
                   ورود / ثبت نام