Enhance Activepieces automation flows with restore UI and publishing

- Add "Restore Defaults" dropdown to Automations page with confirmation
- Create flows in "Defaults" folder for organization
- Pre-populate trigger sample data when creating/restoring flows
- Auto-publish flows (lock and enable) after creation
- Fix email template context variables to match template tags
- Fix dark mode logo switching in Activepieces iframe
- Add iframe refresh on flow restore
- Auto-populate business context (name, email, phone, address) in emails

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

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

frontend/src/hooks/useActivepieces.ts

@@ -0,0 +1,35 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import * as activepiecesApi from '../api/activepieces';
+
+export const activepiecesKeys = {
+  all: ['activepieces'] as const,
+  defaultFlows: () => [...activepiecesKeys.all, 'defaultFlows'] as const,
+};
+
+export const useDefaultFlows = () => {
+  return useQuery({
+    queryKey: activepiecesKeys.defaultFlows(),
+    queryFn: activepiecesApi.getDefaultFlows,
+    staleTime: 30 * 1000,
+  });
+};
+
+export const useRestoreFlow = () => {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: activepiecesApi.restoreFlow,
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: activepiecesKeys.defaultFlows() });
+    },
+  });
+};
+
+export const useRestoreAllFlows = () => {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: activepiecesApi.restoreAllFlows,
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: activepiecesKeys.defaultFlows() });
+    },
+  });
+};