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/mailjet/src/lib/actions/send-email.ts

@@ -0,0 +1,88 @@
+import { createAction, Property } from '@activepieces/pieces-framework';
+import { AuthenticationType, httpClient, HttpMethod, HttpRequest } from '@activepieces/pieces-common';
+import { mailjetAuth } from '../../';
+
+export const sendEmail = createAction({
+  auth: mailjetAuth,
+  name: 'send_email',
+  displayName: 'Send Email',
+  description: 'Send a text, HTML or template email through Mailjet',
+  props: {
+    fromEmail: Property.ShortText({
+      displayName: 'From (Email)',
+      description: 'Sender email, must be verified in Mailjet',
+      required: true
+    }),
+    fromName: Property.ShortText({
+      displayName: 'From (Name)',
+      required: false
+    }),
+    toEmails: Property.Array({
+      displayName: 'Emails of recipients',
+      required: true
+    }),
+    subject: Property.ShortText({
+      displayName: 'Subject',
+      description: undefined,
+      required: true
+    }),
+    textPart: Property.LongText({
+      displayName: 'Text part',
+      description: undefined,
+      required: false
+    }),
+    htmlPart: Property.LongText({
+      displayName: 'HTML part',
+      description: undefined,
+      required: false
+    }),
+    templateId: Property.Number({
+      displayName: 'Template Id',
+      description: 'Template Id (number) defined in Mailjet',
+      required: false
+    }),
+    templateVariables: Property.Object({
+      displayName: 'Template variables',
+      description: undefined,
+      required: false
+    })
+  },
+  async run(configValue) {
+    const { propsValue, auth } = configValue;
+
+    const message = {
+      From: {
+        Email: propsValue.fromEmail,
+        Name: propsValue.fromName || propsValue.fromEmail
+      },
+      To: propsValue.toEmails.map(to => ({
+        Email: to,
+        Name: to
+      })),
+      Subject: propsValue.subject,
+      TextPart: propsValue.textPart,
+      TemplateID: propsValue.templateId,
+      TemplateLanguage: !!propsValue.templateId,
+      Variables: propsValue.templateVariables
+    };
+    const request: HttpRequest<string> = {
+      method: HttpMethod.POST,
+      url: `https://api.mailjet.com/v3.1/send`,
+      body: JSON.stringify({ messages: [message] }),
+      authentication: {
+        type: AuthenticationType.BASIC,
+        username: auth.username,
+        password: auth.password
+      },
+      queryParams: {}
+    };
+
+    const response = await httpClient.sendRequest(request);
+
+    if (response.status !== 200) {
+      throw new Error(`Failed to communicate with Mailjet`);
+    } else {
+      return response.body.Messages[0];
+    }
+  }
+});