fix: Decode callback URL and reset loading state on authentication error

src/components/auth/user-auth-form.tsx

@@ -26,7 +26,8 @@ export function UserAuthForm({
       const body: Record<string, any> = {};
       const callbackUrl = searchParams?.get("callbackUrl");
       if (callbackUrl) {
-        body.return_url = callbackUrl;
+        const decodedUrl = decodeURIComponent(callbackUrl);
+        body.return_url = decodedUrl;
       }
 
       const response = await fetch("/api/auth/q58", {
@@ -50,6 +51,7 @@ export function UserAuthForm({
         description: "登录过程中发生错误，请稍后重试",
         variant: "destructive",
       });
+      setIsLoading(false);
     }
   }