fix(web): login honors from-path redirect; me-error clears stored token

web/src/auth/AuthContext.tsx

@@ -26,7 +26,10 @@ export function AuthProvider({ children }: { children: ReactNode }) {
 
   const meQ = useQuery({ queryKey: ["me"], queryFn: api.me, enabled: !!token, retry: 0 });
   useEffect(() => {
-    if (token && meQ.isError) setTok(null);
+    if (token && meQ.isError) {
+      setToken(null); // 非 401 失败也要清持久化 token，避免与 React 状态分叉导致 RequireAuth 永久加载
+      setTok(null);
+    }
   }, [token, meQ.isError]);
 
   const value = useMemo<AuthState>(

web/src/pages/Login.tsx

@@ -1,5 +1,5 @@
 import { useState, type FormEvent } from "react";
-import { Navigate, useLocation, useNavigate } from "react-router-dom";
+import { Navigate, useLocation } from "react-router-dom";
 import { useAuth } from "../auth/AuthContext";
 import { toast } from "../components/Toaster";
 import { btnPrimary, card, input } from "../components/ui";
@@ -7,7 +7,6 @@ import { btnPrimary, card, input } from "../components/ui";
 export default function Login() {
   const { login, user } = useAuth();
   const loc = useLocation() as { state?: { from?: string } };
-  const nav = useNavigate();
   const [u, setU] = useState("");
   const [p, setP] = useState("");
   const [busy, setBusy] = useState(false);
@@ -19,7 +18,6 @@ export default function Login() {
     setBusy(true);
     try {
       await login(u, p);
-      nav("/", { replace: true });
     } catch (err) {
       toast("err", err instanceof Error ? err.message : "登录失败");
     } finally {