feat: add settings seed action and remove login credentials

SuperAdmins can seed once from Settings, and the login page no longer exposes default credentials.

src/router/routes.js

@@ -181,6 +181,13 @@ export const routes = [
         meta: { permission: 'logs:read' }
       },
 
+      {
+        path: 'settings',
+        name: 'Settings',
+        component: () => import('@/views/settings/SettingsView.vue'),
+        meta: { title: 'تنظیمات', superAdminOnly: true }
+      },
+
       // Errors
       {
         path: '403',