fix(Dependencies): Show pending change requests only where the API lists them

Hidden without the create change request permission, which the API needs,
and one published or deleted since listing drops out instead of failing
the section.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: talissoncosta

frontend/common/services/useFeatureDependency.ts

@@ -226,7 +226,12 @@ export const pendingFeatureDependencyService =
               ),
             ),
           )
-          if (lists.some((list) => list.isError)) {
+          // Published or deleted since it was listed, so nothing is pending.
+          const isGone = (list: (typeof lists)[number]) =>
+            !!list.error &&
+            'status' in list.error &&
+            (list.error.status === 400 || list.error.status === 404)
+          if (lists.some((list) => list.isError && !isGone(list))) {
             return {
               error: {
                 error: "Could not load a change request's dependencies.",

frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/FeatureDependenciesTab.tsx

@@ -202,7 +202,8 @@ const FeatureDependenciesTab: FC<FeatureDependenciesTabProps> = ({
         />
       )}
 
-      {isChangeRequest && (
+      {/* The API lists them only to those who can create change requests. */}
+      {isChangeRequest && permission && (
         <PendingChangeRequests
           environmentId={environmentId}
           featureId={projectFlag.id}