Refactor admin area and remove legacy root paths

messages/ar.json

@@ -6,7 +6,7 @@
     "about": "معلومات عني",
     "contact": "تواصل معي",
     "soon": "قــريــبــاً",
-    "root": "Root",
+    "admin": "Admin",
     "openMenu": "فتح القائمة",
     "closeMenu": "إغلاق القائمة",
     "themeToggle": "تبديل المظهر",

messages/de.json

@@ -6,7 +6,7 @@
     "about": "Über mich",
     "contact": "Kontakt",
     "soon": "Bald",
-    "root": "Root",
+    "admin": "Admin",
     "openMenu": "Menü öffnen",
     "closeMenu": "Menü schliessen",
     "themeToggle": "Theme wechseln",

messages/en.json

@@ -6,7 +6,7 @@
     "about": "About Me",
     "contact": "Contact",
     "soon": "Soon",
-    "root": "Root",
+    "admin": "Admin",
     "openMenu": "Open menu",
     "closeMenu": "Close menu",
     "themeToggle": "Toggle theme",