feat(settings): move BrowserExtensionCard from Maintenance to Overview tab — Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/components/settings/MaintenancePanel.vue

@@ -14,7 +14,6 @@
     <AliasTable class="mt-4" />
     <BackupCard class="mt-6" />
     <TagMaintenanceCard class="mt-6" />
-    <BrowserExtensionCard class="mt-6" />
     <LegacyMigrationCard class="mt-6" />
   </div>
 </template>
@@ -27,7 +26,6 @@ import AllowlistTable from './AllowlistTable.vue'
 import AliasTable from './AliasTable.vue'
 import BackupCard from './BackupCard.vue'
 import TagMaintenanceCard from './TagMaintenanceCard.vue'
-import BrowserExtensionCard from './BrowserExtensionCard.vue'
 import LegacyMigrationCard from './LegacyMigrationCard.vue'
 </script>