Prompt family members to contact admin to change referral code

mobile/lib/generated/intl/messages_en.dart

@@ -127,6 +127,9 @@ class MessageLookup extends MessageLookupByLibrary {
 
   static String m37(name) => "Not ${name}?";
 
+  static String m71(familyAdminEmail) =>
+      "Please contact ${familyAdminEmail} to change your code.";
+
   static String m38(passwordStrengthValue) =>
       "Password strength: ${passwordStrengthValue}";
 
@@ -1067,6 +1070,7 @@ class MessageLookup extends MessageLookupByLibrary {
         "onDevice": MessageLookupByLibrary.simpleMessage("On device"),
         "onEnte": MessageLookupByLibrary.simpleMessage(
             "On <branding>ente</branding>"),
+        "onlyFamilyAdminCanChangeCode": m71,
         "oops": MessageLookupByLibrary.simpleMessage("Oops"),
         "oopsCouldNotSaveEdits":
             MessageLookupByLibrary.simpleMessage("Oops, could not save edits"),

mobile/lib/generated/l10n.dart

@@ -2096,6 +2096,16 @@ class S {
     );
   }
 
+  /// `Please contact {familyAdminEmail} to change your code.`
+  String onlyFamilyAdminCanChangeCode(Object familyAdminEmail) {
+    return Intl.message(
+      'Please contact $familyAdminEmail to change your code.',
+      name: 'onlyFamilyAdminCanChangeCode',
+      desc: '',
+      args: [familyAdminEmail],
+    );
+  }
+
   /// `{storageAmountInGB} GB`
   String storageInGB(Object storageAmountInGB) {
     return Intl.message(

mobile/lib/l10n/intl_en.arb

@@ -277,6 +277,7 @@
   "change": "Change",
   "unavailableReferralCode": "Sorry, this code is unavailable.",
   "codeChangeLimitReached": "Sorry, you've reached the limit of code changes.",
+  "onlyFamilyAdminCanChangeCode": "Please contact {familyAdminEmail} to change your code.",
   "storageInGB": "{storageAmountInGB} GB",
   "claimed": "Claimed",
   "@claimed": {

mobile/lib/ui/growth/referral_code_widget.dart

@@ -3,6 +3,7 @@ import "package:dotted_border/dotted_border.dart";
 import "package:flutter/material.dart";
 import "package:logging/logging.dart";
 import "package:photos/generated/l10n.dart";
+import "package:photos/models/user_details.dart";
 import "package:photos/services/storage_bonus_service.dart";
 import "package:photos/theme/ente_theme.dart";
 import "package:photos/utils/dialog_util.dart";
@@ -10,12 +11,14 @@ import "package:photos/utils/dialog_util.dart";
 // Figma: https://www.figma.com/file/SYtMyLBs5SAOkTbfMMzhqt/ente-Visual-Design?node-id=11219%3A62974&t=BRCLJhxXP11Q3Wyw-0
 class ReferralCodeWidget extends StatelessWidget {
   final String codeValue;
-  final bool shouldAllowEdit;
+  final bool shouldShowEdit;
+  final UserDetails? userDetails;
   final Function? notifyParent;
 
   const ReferralCodeWidget(
     this.codeValue, {
-    this.shouldAllowEdit = false,
+    this.shouldShowEdit = false,
+    this.userDetails,
     this.notifyParent,
     super.key,
   });
@@ -49,10 +52,26 @@ class ReferralCodeWidget extends StatelessWidget {
                   ),
                 ),
                 const SizedBox(width: 12),
-                shouldAllowEdit
+                shouldShowEdit
                     ? GestureDetector(
                         onTap: () {
-                          showUpdateReferralCodeDialog(context);
+                          if (userDetails!.isPartOfFamily() &&
+                              !userDetails!.isFamilyAdmin()) {
+                            final String familyAdmin = userDetails!
+                                .familyData!.members!
+                                .firstWhere((element) => element.isAdmin)
+                                .email;
+                            showInfoDialog(
+                              context,
+                              title: S.of(context).error,
+                              body: S
+                                  .of(context)
+                                  .onlyFamilyAdminCanChangeCode(familyAdmin),
+                              icon: Icons.error,
+                            );
+                          } else {
+                            showUpdateReferralCodeDialog(context);
+                          }
                         },
                         child: Icon(
                           Icons.edit,

mobile/lib/ui/growth/referral_screen.dart

@@ -166,7 +166,8 @@ class ReferralWidget extends StatelessWidget {
                             const SizedBox(height: 12),
                             ReferralCodeWidget(
                               referralView.code,
-                              shouldAllowEdit: true,
+                              shouldShowEdit: true,
+                              userDetails: userDetails,
                               notifyParent: notifyParent,
                             ),
                             const SizedBox(height: 12),