fix(admin): restore Vite admin source files

assets/admin/src/schema/sections/global/floating.js

@@ -0,0 +1,8 @@
+export const floatingSchema = {
+  key: 'global.floating',
+  title: '右侧悬浮按钮',
+  icon: 'fas fa-ellipsis-v',
+  description: '页面右侧浮动按钮的显示与配置。',
+  defaults: {},
+  groups: [],
+}