Add Khanegi default appearance snapshot seed and strip SA meta from get_user.

Mirrors Hamkar so each khanegi tenant can restore its factory ui-config without exposing defaultSnapshot publicly.

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

src/get-user/get-user.service.ts

@@ -75,7 +75,8 @@ export class GetUserService {
       product: tenant.product,
       theme: themeMode,
       mode: themeMode,
-      app_ui_config: tenant.product === 'khanegi' ? ui : undefined,
+      app_ui_config:
+        tenant.product === 'khanegi' ? this.stripKhanegiSaMeta(ui) : undefined,
       /** Laravel-compatible overlay; Hamkar merges only when present */
       ui_settings: uiSettings.length ? uiSettings : undefined,
     };
@@ -86,6 +87,12 @@ export class GetUserService {
     };
   }
 
+  private stripKhanegiSaMeta(ui: Record<string, any> | null) {
+    if (!ui || typeof ui !== 'object') return ui;
+    const { defaultSnapshot: _snap, _backfill, ...rest } = ui;
+    return rest;
+  }
+
   private buildHamkarUiSettings(ui: Record<string, any>): UiSetting[] {
     const settings = ui?.settings;
     if (!settings || typeof settings !== 'object') return [];