fix(auth): correct login detection + return to origin after login

- isUserLoggedIn() checked the access_token cookie, which is never set
  (access_token lives in memory / tokenStore; only userInfo + uuid are
  cookies). It therefore always returned false — the claim modal (and
  comment auth checks) kept showing the login prompt even when logged in.
  Now reads the userInfo cookie.
- Claim modal login link carries ?redirect=<current path>; after OTP login
  SendReq returns to that path (guarded to internal "/..." only, blocks
  protocol-relative //) instead of always going to "/".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

components/doctor/claim/index.js

@@ -1,7 +1,7 @@
 "use client";
 
 import { useState } from "react";
-import { useRouter } from "next/navigation";
+import { useRouter, usePathname } from "next/navigation";
 import Link from "next/link";
 import { Box, Button, Modal, TextField } from "@mui/material";
 import { styleDefault } from "@/mui";
@@ -20,6 +20,7 @@ const initialForm = { national_code: "", birth_date: "", first_name: "", last_na
  */
 function ClaimProfileSection({ doctor }) {
   const router = useRouter();
+  const pathname = usePathname();
   const [open, setOpen] = useState(false);
   const [form, setForm] = useState(initialForm);
   const [fieldErrors, setFieldErrors] = useState({});
@@ -179,7 +180,7 @@ function ClaimProfileSection({ doctor }) {
                 برای احراز مالکیت، ابتدا با شماره موبایل خود وارد شوید. پس از ورود،
                 به همین صفحه بازگردید و دوباره تلاش کنید.
               </p>
-              <Link href="/login" className="w-full">
+              <Link href={`/login?redirect=${encodeURIComponent(pathname)}`} className="w-full">
                 <Button variant="contained" className="!rounded-[12px] w-full">
                   ورود / ثبت‌نام با موبایل
                 </Button>

components/register/verificationPage/SendReq.js

@@ -86,7 +86,12 @@ function SendReq({
           if (setStep) {
             setStep(3);
           } else {
-            window.location.href = "/";
+            // بازگشت به صفحهٔ مبدأ اگر ?redirect= داده شده (فقط مسیر داخلی امن)
+            const redirect = new URLSearchParams(window.location.search).get("redirect");
+            window.location.href =
+              redirect && redirect.startsWith("/") && !redirect.startsWith("//")
+                ? redirect
+                : "/";
           }
         } else {
           setIsError(true);