chore(rsocials): add NewsletterDraft and NewsletterSubscriber types

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

modules/rsocials/schemas.ts

@@ -360,6 +360,26 @@ export const CAMPAIGN_NODE_CATALOG: CampaignWorkflowNodeDef[] = [
 	},
 ];
 
+// ── Newsletter draft types ──
+
+export interface NewsletterSubscriber {
+	email: string;
+	name?: string;
+	addedAt: number;
+}
+
+export interface NewsletterDraft {
+	id: string;
+	title: string;
+	subject: string;
+	body: string; // HTML
+	status: 'draft' | 'ready' | 'sent';
+	subscribers: NewsletterSubscriber[];
+	createdAt: number;
+	updatedAt: number;
+	createdBy: string;
+}
+
 // ── Approval queue types ──
 
 export interface PendingApproval {