fix: disable referrer input when pre-filled from deep link

Prevent user from editing or clearing the referrer address when it
comes from a referral deep link to ensure correct on-chain submission.

feature-assets/src/main/java/io/novafoundation/nova/feature_assets/presentation/citizenship/CitizenshipBottomSheet.kt

@@ -65,6 +65,9 @@ class CitizenshipBottomSheet : BaseBottomSheetFragment<CitizenshipViewModel, Fra
         val referrer = arguments?.getString(KEY_REFERRER)
         if (!referrer.isNullOrBlank()) {
             binder.citizenshipReferrerInput.setText(referrer)
+            binder.citizenshipReferrerInput.isEnabled = false
+            binder.citizenshipReferrerLayout.isEnabled = false
+            binder.citizenshipReferrerLayout.hint = getString(R.string.citizenship_referrer_hint)
         }
     }