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/pieces/community/manychat/src/index.ts

@@ -0,0 +1,57 @@
+import { createPiece, PieceAuth } from '@activepieces/pieces-framework';
+import { findUserByCustomFieldAction } from './lib/actions/find-user-by-custom-field';
+import { createSubscriberAction } from './lib/actions/create-subscriber';
+import { sendContentToUserAction } from './lib/actions/send-content-to-user';
+import { setCustomFieldAction } from './lib/actions/set-custom-fields';
+import { removeTagFromUserAction } from './lib/actions/remove-tag-from-user';
+import { addTagToUserAction } from './lib/actions/add-tag-to-user';
+import { findUserByNameAction } from './lib/actions/find-user-by-name';
+import { PieceCategory } from '@activepieces/shared';
+import { AuthenticationType, httpClient, HttpMethod } from '@activepieces/pieces-common';
+import { BASE_URL } from './lib/common/props';
+
+export const manychatAuth = PieceAuth.SecretText({
+	displayName: 'API Key',
+	required: true,
+	description: `You can create an API key by navigating to **Setting -> Extensions -> API**.`,
+	validate: async ({ auth }) => {
+		try {
+			await httpClient.sendRequest({
+				method: HttpMethod.GET,
+				url: `${BASE_URL}/page/getInfo`,
+				authentication: {
+					type: AuthenticationType.BEARER_TOKEN,
+					token: auth
+				},
+			});
+			return {
+				valid: true,
+			};
+		} catch (e) {
+			return {
+				valid: false,
+				error: 'Invalid API Key',
+			};
+		}
+	},
+});
+
+export const manychat = createPiece({
+	displayName: 'Manychat',
+	description: 'Automations for Instagram, WhatsApp, TikTok, and Messenger marketing.',
+	categories: [PieceCategory.MARKETING],
+	auth: manychatAuth,
+	minimumSupportedRelease: '0.36.1',
+	logoUrl: 'https://cdn.activepieces.com/pieces/manychat.png',
+	authors: ['neo773', 'kishanprmr'],
+	actions: [
+		addTagToUserAction,
+		createSubscriberAction,
+		findUserByCustomFieldAction,
+		findUserByNameAction,
+		removeTagFromUserAction,
+		sendContentToUserAction,
+		setCustomFieldAction,
+	],
+	triggers: [],
+});