diff --git a/web/website/src/components/InviteCard.jsx b/web/website/src/components/InviteCard.jsx
index ea76cf4..a39f052 100644
--- a/web/website/src/components/InviteCard.jsx
+++ b/web/website/src/components/InviteCard.jsx
@@ -18,7 +18,7 @@
  * ——与主页行为一致，用户可用 Header 的语言下拉自行切换（切换会带上当前的邀请码路径，见
  * Header.jsx 的 `pagePath` 机制）。
  */
-import { useEffect, useMemo, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import { Copy, Check, Download, UserPlus, Gift, ArrowRight } from 'lucide-react';
 import { isLoggedIn } from '../lib/authState';
 import { INVITE_CODE_RE } from '../lib/inviteCode';
@@ -163,12 +163,17 @@ export default function InviteCard({ lang = 'en' }) {
   const [code, setCode] = useState(null);
   const [copied, setCopied] = useState(false);
   const [loggedIn, setLoggedIn] = useState(false);
+  // onCopy 里 1.5s 后把 copied 复位的 setTimeout 存 ref,卸载时 clear——
+  // 否则用户复制后立刻离开页面,定时器仍会在已卸载组件上触发 setState。
+  const copyTimeoutRef = useRef(null);
 
   useEffect(() => {
     setCode(extractCode(window.location.pathname));
     setLoggedIn(isLoggedIn());
   }, []);
 
+  useEffect(() => () => clearTimeout(copyTimeoutRef.current), []);
+
   const t = COPY[lang] || COPY.en;
   const dlHref = useMemo(() => `${langPath(lang)}#download`, [lang]);
   const registerHref = useMemo(
@@ -181,7 +186,8 @@ export default function InviteCard({ lang = 'en' }) {
     try {
       await navigator.clipboard.writeText(code);
       setCopied(true);
-      setTimeout(() => setCopied(false), 1500);
+      clearTimeout(copyTimeoutRef.current);
+      copyTimeoutRef.current = setTimeout(() => setCopied(false), 1500);
     } catch {
       // 剪贴板权限失败时静默，用户仍可长按/选中手动复制。
     }
diff --git a/web/website/src/components/RegisterCard.jsx b/web/website/src/components/RegisterCard.jsx
index 41d742a..77f4d60 100644
--- a/web/website/src/components/RegisterCard.jsx
+++ b/web/website/src/components/RegisterCard.jsx
@@ -311,6 +311,9 @@ export default function RegisterCard({ lang = 'en' }) {
   const [redirectIn, setRedirectIn] = useState(REDIRECT_SECS);
   const redirectRef = useRef(null);
   const codeInputRef = useRef(null);
+  // 卸载守卫:onSendCode/onRegister 里 await callApi 期间组件若已卸载(用户导航离开),
+  // 之后的 setState 直接跳过——避免 unmounted 组件 setState 的告警/竞态。
+  const mountedRef = useRef(true);
 
   const t = COPY[lang] || COPY.en;
   // 后端错误字段只有 message_zh/message_en 两语；非中文一律取英文兜底（见组件顶部注释）。
@@ -334,6 +337,7 @@ export default function RegisterCard({ lang = 'en' }) {
 
   useEffect(() => () => clearInterval(cooldownRef.current), []);
   useEffect(() => () => clearInterval(redirectRef.current), []);
+  useEffect(() => () => { mountedRef.current = false; }, []);
 
   useEffect(() => {
     if (codeSent && codeInputRef.current) codeInputRef.current.focus();
@@ -381,6 +385,7 @@ export default function RegisterCard({ lang = 'en' }) {
     }
     setSendingCode(true);
     const r = await callApi('/v1/auth/code', { email: trimmed });
+    if (!mountedRef.current) return;
     setSendingCode(false);
     if (!r.ok) {
       setCodeErr(r.network ? t.netErr : (r.error && r.error[msgKey]) || t.netErr);
@@ -403,6 +408,7 @@ export default function RegisterCard({ lang = 'en' }) {
     const body = { email: trimmedEmail, code, password };
     if (invite) body.invite_code = invite;
     const r = await callApi('/v1/auth/register', body);
+    if (!mountedRef.current) return;
     setSubmitting(false);
     if (!r.ok) {
       setRegErr(r.network ? t.netErr : (r.error && r.error[msgKey]) || t.netErr);