small visual fixes + upgrade to astro v4

static/assets/data/_navdata.json

@@ -2,17 +2,17 @@
 	{
         "link": "/",
         "text": "Home",
-        "icon": "iconoir-home-alt"
+        "icon": "iconoir-home"
 	},
     {
         "link": "/servants",
         "text": "Servants",
-        "icon": "iconoir-database-script"
+        "icon": "iconoir-task-list"
 	},
     {
         "link": "/ta-collection",
         "text": "TA Collection",
-        "icon": "iconoir-db"
+        "icon": "iconoir-database"
 	},
     {
         "link": "/blog",