resovled build error and added tilebar navigation

src/stores/muscles.js

@@ -0,0 +1,13 @@
+import {Back, Biceps, Chest, Legs, Shoulder, Triceps } from "../views/muscles/Index.js";
+
+export default {
+    path: '/muscles',
+    children: [
+        { path: 'legs', component: Legs },
+        { path: 'back', component: Back },
+        { path: 'chest', component: Chest },
+        { path: 'shoulder', component: Shoulder },
+        { path: 'triceps', component: Triceps },
+        { path: 'biceps', component: Biceps },
+    ]
+};