Revert "TEMP: force the SSO variant of the email modal for review"

This reverts commit 81bacb1.

The copy is signed off, so the modal goes back to branching on the real
isSsoManaged value.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: samejr

apps/webapp/app/routes/account._index/route.tsx

@@ -950,9 +950,7 @@ export default function Page() {
                 <Paragraph variant="small" className="min-w-0 break-all text-right">
                   {user.email}
                 </Paragraph>
-                {/* TEMP: forced true to preview the SSO copy. Revert to
-                    `isSsoManaged={isSsoManaged}` before committing. */}
-                <EditEmailButton isSsoManaged={true} />
+                <EditEmailButton isSsoManaged={isSsoManaged} />
               </div>
             </div>
           </div>