feat(get-user): emit brand_chrome for Hamkar brandManaged opt-in

Expose brand_chrome so apps apply header/menu/body colors only after SuperAdmin color save.

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

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

@@ -122,6 +122,12 @@ export class GetUserService {
           : undefined,
       /** Laravel-compatible overlay; Hamkar merges only when present */
       ui_settings: uiSettings.length ? uiSettings : undefined,
+      /**
+       * Hamkar only: when true, apply brand colors to mobile header+menu and page body
+       * (including theme-two). Absent/false → keep factory chrome (no visual jump).
+       */
+      brand_chrome:
+        isHamkarUi && ui?.brandManaged === true ? true : undefined,
       /** Admin expiry modals — near/expired server, plugin, support */
       subscription_alerts,
       plugin_store_enabled: isKhanegi