's'

app/page.tsx

@@ -270,6 +270,30 @@ export default function Home() {
     init();
   }, [clearAllStorage, getOrCreateUserId, checkPaymentFromPB, savePaidType, saveUserName]);
 
+  // 页面重新可见或从 bfcache 恢复时检查支付状态（从 /paid 返回、切换标签页、后退等）
+  useEffect(() => {
+    const syncFromStorage = () => {
+      const localType = getStorage("paidType");
+      const localUserName = getStorage("userName");
+      if (localType && localUserName && !paidType) {
+        setPaidType(localType);
+        setUserName(localUserName);
+      }
+    };
+    const onVisible = () => syncFromStorage();
+    const onPageShow = (e: PageTransitionEvent) => {
+      if (e.persisted) syncFromStorage(); // 从 bfcache 恢复
+    };
+    if (typeof document !== "undefined" && document.addEventListener) {
+      document.addEventListener("visibilitychange", onVisible);
+      window.addEventListener("pageshow", onPageShow);
+      return () => {
+        document.removeEventListener("visibilitychange", onVisible);
+        window.removeEventListener("pageshow", onPageShow);
+      };
+    }
+  }, [paidType]);
+
   marked.setOptions({ breaks: true, gfm: true });
 
   return (