🚸(frontend) prevent duplicate invite user row in DocShareModal

Modify the DocShareModal to avoid showing the invite user row when the
email already exists in the search results, preventing redundant invite
options

src/frontend/apps/impress/src/features/docs/doc-share/components/DocShareModal.tsx

@@ -137,17 +137,20 @@ export const DocShareModal = ({ doc, onClose }: Props) => {
       short_name: '',
     };
 
+    const hasEmailInUsers = users.some((user) => user.email === userQuery);
+
     return {
       groupName: t('Search user result'),
       elements: users,
-      endActions: isEmail
-        ? [
-            {
-              content: <DocShareModalInviteUserRow user={newUser} />,
-              onSelect: () => void onSelect(newUser),
-            },
-          ]
-        : undefined,
+      endActions:
+        isEmail && !hasEmailInUsers
+          ? [
+              {
+                content: <DocShareModalInviteUserRow user={newUser} />,
+                onSelect: () => void onSelect(newUser),
+              },
+            ]
+          : undefined,
     };
   }, [searchUsersQuery.data, t, userQuery]);