fix: 修复换火山账号导致素材库操作失败问题

core/frontend/src/components/app-shell.tsx

@@ -431,11 +431,12 @@ export function ToastLike({ notice }: { notice: NonNullable<Notice> }) {
     return () => cancelAnimationFrame(raf);
   }, []);
   const Icon = notice.type === "error" ? AlertCircle : notice.type === "info" ? Info : Check;
-  return (
+  return createPortal(
     <div className={`toast${show ? " show" : ""}`} role="status" aria-live="polite">
       <div className="ic-t"><Icon size={13} /></div>
       <div className="txt">{notice.text}<span className="mono">[ {notice.type.toUpperCase()} ]</span></div>
-    </div>
+    </div>,
+    document.body,
   );
 }
 

core/frontend/src/design-restraint.css

@@ -1728,7 +1728,7 @@ table.t tbody tr:hover { background: var(--black-alpha-4); }
   box-shadow: var(--shadow-floating);
   transform: translateX(420px);
   transition: transform var(--t-slow);
-  z-index: 1000;
+  z-index: 10000;
   min-width: 260px;
 }
 .toast.show { transform: translateX(0); }