fix(projects): 修复vertical-mix布局、重构初始化的loading

src/interface/expose.ts

@@ -0,0 +1,3 @@
+export interface ExposeLayoutMixMenu {
+  resetFirstDegreeMenus(): void;
+}

src/interface/index.ts

@@ -1,4 +1,5 @@
 export * from './enum';
 export * from './theme';
 export * from './system';
+export * from './expose';
 export * from './layout';