Add Activepieces integration for workflow automation

- Add Activepieces fork with SmoothSchedule custom piece
- Create integrations app with Activepieces service layer
- Add embed token endpoint for iframe integration
- Create Automations page with embedded workflow builder
- Add sidebar visibility fix for embed mode
- Add list inactive customers endpoint to Public API
- Include SmoothSchedule triggers: event created/updated/cancelled
- Include SmoothSchedule actions: create/update/cancel events, list resources/services/customers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

activepieces-fork/packages/react-ui/src/app/builder/flow-versions/index.tsx

@@ -0,0 +1,64 @@
+import { useQuery } from '@tanstack/react-query';
+import { t } from 'i18next';
+
+import {
+  RightSideBarType,
+  useBuilderStateContext,
+} from '@/app/builder/builder-hooks';
+import { CardList, CardListItemSkeleton } from '@/components/custom/card-list';
+import { ScrollArea } from '@/components/ui/scroll-area';
+import { flowsApi } from '@/features/flows/lib/flows-api';
+import { FlowVersionMetadata, SeekPage } from '@activepieces/shared';
+
+import { SidebarHeader } from '../sidebar-header';
+
+import { FlowVersionDetailsCard } from './flow-versions-card';
+
+const FlowVersionsList = () => {
+  const [flow, setRightSidebar, selectedFlowVersion] = useBuilderStateContext(
+    (state) => [state.flow, state.setRightSidebar, state.flowVersion],
+  );
+
+  const {
+    data: flowVersionPage,
+    isLoading,
+    isError,
+  } = useQuery<SeekPage<FlowVersionMetadata>, Error>({
+    queryKey: ['flow-versions', flow.id],
+    queryFn: () =>
+      flowsApi.listVersions(flow.id, {
+        limit: 1000,
+        cursor: undefined,
+      }),
+    staleTime: 0,
+  });
+
+  return (
+    <>
+      <SidebarHeader onClose={() => setRightSidebar(RightSideBarType.NONE)}>
+        {t('Version History')}
+      </SidebarHeader>
+      <CardList>
+        {isLoading && <CardListItemSkeleton numberOfCards={10} />}
+        {isError && <div>{t('Error, please try again.')}</div>}
+        {flowVersionPage && flowVersionPage.data && (
+          <ScrollArea className="w-full h-full">
+            {flowVersionPage.data.map((flowVersion, index) => (
+              <FlowVersionDetailsCard
+                selected={flowVersion.id === selectedFlowVersion?.id}
+                publishedVersionId={flow.publishedVersionId}
+                flowVersion={flowVersion}
+                flowVersionNumber={flowVersionPage.data.length - index}
+                key={flowVersion.id}
+              />
+            ))}
+          </ScrollArea>
+        )}
+      </CardList>
+    </>
+  );
+};
+
+FlowVersionsList.displayName = 'FlowVersionsList';
+
+export { FlowVersionsList };