feat: super admin use sakai

frontend/superadmin/src/assets/demo/code.scss

@@ -0,0 +1,17 @@
+pre.app-code {
+    background-color: var(--code-background);
+    margin: 0 0 1rem 0;
+    padding: 0;
+    border-radius: var(--content-border-radius);
+    overflow: auto;
+
+    code {
+        color: var(--code-color);
+        padding: 1rem;
+        margin: 0;
+        line-height: 1.5;
+        display: block;
+        font-weight: semibold;
+        font-family: monaco, Consolas, monospace;
+    }
+}

frontend/superadmin/src/assets/demo/demo.scss

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+@use './code.scss';
+@use './flags/flags.css';