refactor: 前端应用骨架迁移至 zustand 并统一路由权限壳

apps/admin/src/components/BrandLogo.tsx

@@ -0,0 +1,24 @@
+import { ReadOutlined } from '@ant-design/icons';
+
+const BRAND_COLOR = '#7e14ff';
+
+/** 全局品牌标识：登录页 / 侧边栏 / 页头统一使用 */
+export function BrandLogo({ size = 32 }: { size?: number }) {
+  return (
+    <span
+      style={{
+        display: 'inline-flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        width: size,
+        height: size,
+        borderRadius: 8,
+        background: BRAND_COLOR,
+        color: '#fff',
+        flexShrink: 0,
+      }}
+    >
+      <ReadOutlined style={{ fontSize: size * 0.55 }} />
+    </span>
+  );
+}