Allow keeping selected calendar pieces/days and regenerating the rest.

Agency can mark good stories, keep only those days, or request a partial v2 for unmarked slots without replacing the whole month.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/calendar/preview/route.ts

@@ -41,11 +41,20 @@ export async function POST(req: NextRequest) {
     );
   }
 
-  const body = (await req.json().catch(() => ({}))) as { month?: string };
+  const body = (await req.json().catch(() => ({}))) as {
+    month?: string;
+    avoid_titles?: string[];
+  };
   const month = String(body.month || '').slice(0, 7);
   if (!/^\d{4}-\d{2}$/.test(month)) {
     return NextResponse.json({ error: 'month YYYY-MM requerido' }, { status: 400 });
   }
+  const avoidTitles = Array.isArray(body.avoid_titles)
+    ? body.avoid_titles
+        .filter((t): t is string => typeof t === 'string' && t.trim().length > 0)
+        .map((t) => t.trim().slice(0, 160))
+        .slice(0, 40)
+    : [];
 
   let slug = 'cliente';
   const t = await restGet<{ slug?: string }[]>(
@@ -122,6 +131,7 @@ export async function POST(req: NextRequest) {
     history,
     brandbook,
     publishedPosts,
+    avoidTitles,
   });
 
   return NextResponse.json({