Add Khanegi uiVariant modular/newTheme with get_user payload split.

Co-authored-by: Cursor <cursoragent@cursor.com>

prisma/schema.prisma

@@ -13,6 +13,12 @@ enum ProductType {
   khanegi
 }
 
+/// Khanegi front-end appearance family (ignored for hamkar).
+enum KhanegiUiVariant {
+  modular
+  newTheme
+}
+
 enum UserRole {
   super_admin
   viewer
@@ -63,6 +69,8 @@ model Tenant {
   smsSyncedAt      DateTime?   @map("sms_synced_at")
   /// Full Khanegi UI JSON (theme, navigation, pages). Hamkar: unused for now.
   appUiConfig      Json?       @map("app_ui_config")
+  /// Khanegi only: which appearance editor / get_user payload shape to use.
+  uiVariant        KhanegiUiVariant @default(modular) @map("ui_variant")
   /// Client cache-bust / force-reload signal for this sold version (GET /get_version).
   appVersion       String      @default("1") @map("app_version")
   isActive         Boolean     @default(true) @map("is_active")