Added sidebar translations

i18n.config.ts

@@ -3,10 +3,48 @@ export default defineI18nConfig(() => ({
   locale: "fr",
   messages: {
     en: {
-      welcome: "Welcome"
+      ui: {
+        greeting: "Connected as {user}",
+        sidebarMenu: {
+          appearance: "Appearance",
+          language: "Language",
+          account: "Account",
+          login: "Log in",
+          logout: "Log out",
+          avatarFallback: "Profile",
+        },
+        dark: "Dark",
+        light: "Light",
+        system: "System",
+      },
+      entity: {
+        world: {
+          nameSingular: "World",
+          namePlural: "Worlds",
+        }
+      }
     },
     fr: {
-      welcome: "Bienvenue"
+      ui: {
+        greeting: "Connecté en tant que {user}",
+        sidebarMenu: {
+          appearance: "Apparence",
+          language: "Langue",
+          account: "Compte",
+          login: "Connexion",
+          logout: "Déconnexion",
+          avatarFallback: "Profil",
+        },
+        dark: "Sombre",
+        light: "Clair",
+        system: "Système",
+      },
+      entity: {
+        world: {
+          nameSingular: "Monde",
+          namePlural: "Mondes",
+        }
+      }
     }
   }
 }))