refactor(admin): simplify entry route to point to dashboard

The `/admin` route now directly serves the dashboard page by adding an alias, removing the need for a separate login page at that path.

- Deletes `pages/admin/index.vue` and the `admin-login` layout.
- Aliases `/admin` to `/admin/dashboard` for a more direct entry point.
- Improves the default layout with a sticky footer.
- Updates VSCode settings for better Tailwind CSS IntelliSense.

app/composables/useDashboardSidebarLinks.ts

@@ -3,13 +3,6 @@ import type { NavigationMenuItem } from "@nuxt/ui";
 export const useDashboardSidebarLinks = () => {
   const sidebarLinks = [
     [
-      {
-        label: "回到主站",
-        icon: "mdi:home",
-        type: "link",
-        to: "/",
-        target: "_blank"
-      },
       {
         label: "仪表盘",
         icon: "mdi:view-dashboard",
@@ -50,6 +43,15 @@ export const useDashboardSidebarLinks = () => {
       //   ],
       // },
     ],
+    [
+      {
+        label: "回到主站",
+        icon: "mdi:home",
+        type: "link",
+        to: "/",
+        target: "_blank",
+      },
+    ],
   ] satisfies NavigationMenuItem[][];
 
   return { sidebarLinks };