Merged in feat/SW-2782-create-sas-branded-header (pull request #2878)

feat(SW-2782): Updated header as per design, added language switcher and user menu

* feat(SW-2782): Updated header as per design, added language switcher and user menu

* feat(SW-2782): Updated UI as per design

* feat(SW-2782): Optimised code with use of Popover and modal from RAC


Approved-by: Anton Gunnarsson

apps/partner-sas/package.json

@@ -31,9 +31,11 @@
     "next": "15.3.4",
     "next-auth": "5.0.0-beta.29",
     "react": "^19.0.0",
+    "react-aria-components": "^1.8.0",
     "react-dom": "^19.0.0",
     "react-intl": "^7.1.11",
-    "server-only": "^0.0.1"
+    "server-only": "^0.0.1",
+    "usehooks-ts": "3.1.1"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",