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/synthesia/src/lib/common/auth.ts

@@ -0,0 +1,19 @@
+import { PieceAuth } from '@activepieces/pieces-framework';
+
+const markdownDescription = `
+To get your Synthesia API Key:
+
+1. Go to the upper right corner of the Synthesia application and click on your account.
+2. Select **Integrations**
+3. Click on **Add** to add a new Synthesia API key.
+4. Copy this key using the 3-dot button on the right side of your API key.
+5. Paste it below.
+
+**Note:** When you create an API key it will belong to your account, not the workspace.
+`;
+
+export const synthesiaAuth = PieceAuth.SecretText({
+  displayName: 'API Key',
+  description: markdownDescription,
+  required: true,
+});

activepieces-fork/packages/pieces/community/synthesia/src/lib/common/props.ts

@@ -0,0 +1,43 @@
+import { Property } from '@activepieces/pieces-framework';
+import { synthesiaAuth } from './auth';
+import { httpClient, HttpMethod } from '@activepieces/pieces-common';
+
+export const templateIdDropdown = Property.Dropdown({
+  auth: synthesiaAuth,
+  displayName: 'Template',
+  description: 'Select the template to use for video creation',
+  required: true,
+  refreshers: [],
+  options: async ({ auth }) => {
+    if (!auth) {
+      return {
+        disabled: true,
+        options: [],
+        placeholder: 'Connect your account',
+      };
+    }
+    try {
+      const apiKey = auth?.secret_text;
+      const response = await httpClient.sendRequest({
+        method: HttpMethod.GET,
+        url: 'https://api.synthesia.io/v2/templates',
+        headers: {
+          Authorization: `Bearer ${apiKey}`,
+        },
+      });
+      return {
+        disabled: false,
+        options: response.body.templates.map((template: any) => ({
+          label: template.title,
+          value: template.id,
+        })),
+      };
+    } catch (error) {
+      return {
+        disabled: true,
+        options: [],
+        placeholder: 'Unable to fetch templates',
+      };
+    }
+  },
+});