feat: Add support for custom email recipients in workflow steps

apps/api/src/services/WorkflowExecutionService.ts

@@ -519,18 +519,25 @@ export class WorkflowExecutionService {
   }
 
   /**
-   * SEND_EMAIL step - Send an email to the contact
+   * SEND_EMAIL step - Send an email to the contact or a custom recipient
    */
   private static async executeSendEmail(
     step: WorkflowStepWithTemplate,
     execution: WorkflowExecutionWithRelations,
     stepExecution: WorkflowStepExecution,
-    _config: StepConfig,
+    config: StepConfig,
   ): Promise<StepResult> {
     if (!step.template) {
       throw new Error('No template configured for SEND_EMAIL step');
     }
 
+    // Parse step config to get recipient configuration
+    const stepConfig = config && typeof config === 'object' && !Array.isArray(config) ? config : {};
+    const recipientConfig =
+      stepConfig.recipient && typeof stepConfig.recipient === 'object' && !Array.isArray(stepConfig.recipient)
+        ? (stepConfig.recipient as {type?: string; customEmail?: string})
+        : {type: 'CONTACT'};
+
     // Get contact data for variable substitution
     const contact = execution.contact;
     const contactData =
@@ -558,10 +565,20 @@ export class WorkflowExecutionService {
     const renderedSubject = this.renderTemplate(step.template.subject, variables);
     const renderedBody = this.renderTemplate(step.template.body, variables);
 
+    // Determine recipient email
+    let recipientEmail = contact.email;
+    let recipientContactId = contact.id;
+
+    if (recipientConfig.type === 'CUSTOM' && recipientConfig.customEmail) {
+      recipientEmail = recipientConfig.customEmail;
+      // For custom recipients, we don't associate with a contact
+      recipientContactId = contact.id; // Keep original contact for tracking
+    }
+
     // Send email via EmailService
     const email = await EmailService.sendWorkflowEmail({
       projectId: execution.workflow.projectId,
-      contactId: contact.id,
+      contactId: recipientContactId,
       workflowExecutionId: execution.id,
       workflowStepExecutionId: stepExecution.id, // Use stepExecution.id, not step.id
       templateId: step.template.id,
@@ -570,11 +587,15 @@ export class WorkflowExecutionService {
       from: step.template.from,
       fromName: step.template.fromName || undefined,
       replyTo: step.template.replyTo || undefined,
+      // Pass custom recipient email if specified
+      recipientEmail: recipientConfig.type === 'CUSTOM' ? recipientEmail : undefined,
     });
 
     return {
       emailId: email.id,
       sentAt: email.createdAt,
+      recipientType: recipientConfig.type,
+      recipientEmail,
     };
   }