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.

.vscode/settings.json

@@ -1,8 +1,23 @@
 {
-    "files.associations": {
-        "*.page-template": "vue",
-        "*.layout-template": "vue",
-        "*.vue": "vue",
-        "*.css": "tailwindcss"
-    }
-}
+  "files.associations": {
+    "*.page-template": "vue",
+    "*.layout-template": "vue",
+    "*.vue": "vue",
+    "*.css": "tailwindcss"
+  },
+  "editor.quickSuggestions": {
+    "other": "on",
+    "comments": "off",
+    "strings": "on"
+  },
+  "tailwindCSS.classAttributes": [
+    "class",
+    "className",
+    "ngClass",
+    "class:list",
+    "ui"
+  ],
+  "tailwindCSS.experimental.classRegex": [
+    ["ui:\\s*{([^)]*)\\s*}", "(?:'|\"|`)([^']*)(?:'|\"|`)"]
+  ]
+}