feat(dashboard,ui): Streamline spacing and sizing (#6061)

packages/admin-next/dashboard/src/app.tsx

@@ -1,28 +1,22 @@
 import { Toaster } from "@medusajs/ui"
 import { MedusaProvider } from "medusa-react"
 
-import { AuthProvider } from "./providers/auth-provider"
 import { RouterProvider } from "./providers/router-provider"
 import { ThemeProvider } from "./providers/theme-provider"
 
-import { queryClient } from "./lib/medusa"
-
-const BASE_URL =
-  import.meta.env.VITE_MEDUSA_ADMIN_BACKEND_URL || "http://localhost:9000"
+import { MEDUSA_BACKEND_URL, queryClient } from "./lib/medusa"
 
 function App() {
   return (
     <MedusaProvider
-      baseUrl={BASE_URL}
+      baseUrl={MEDUSA_BACKEND_URL}
       queryClientProviderProps={{
         client: queryClient,
       }}
     >
       <ThemeProvider>
-        <AuthProvider>
-          <RouterProvider />
-          <Toaster />
-        </AuthProvider>
+        <RouterProvider />
+        <Toaster />
       </ThemeProvider>
     </MedusaProvider>
   )