feat: Add February 2026 content calendar and thread publishing support

- Generate 24 posts for February: 12 tips, 4 threads, 8 promotional
- Schedule automatic publication at optimal times
- Update publish_to_platform to handle hilo_educativo as threads
- Parse JSON thread posts and publish using publish_thread()

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

worker/tasks/publish_post.py

@@ -67,6 +67,7 @@ def publish_scheduled_posts():
 )
 def publish_to_platform(self, post_id: int, platform: str):
     """Publicar un post en una plataforma específica."""
+    import json
     db = SessionLocal()
 
     try:
@@ -74,19 +75,33 @@ def publish_to_platform(self, post_id: int, platform: str):
         if not post:
             return f"Post {post_id} no encontrado"
 
-        # Obtener contenido para esta plataforma
-        content = post.get_content_for_platform(platform)
-
         # Obtener publisher
         try:
             publisher = get_publisher(platform)
         except ValueError as e:
             return f"Error: {e}"
 
-        # Publicar
-        result = run_async(
-            publisher.publish(content, post.image_url)
-        )
+        # Verificar si es un hilo
+        if post.content_type == "hilo_educativo":
+            # Parsear posts del hilo desde content_x (JSON)
+            try:
+                thread_posts = json.loads(post.content_x) if post.content_x else []
+                if not thread_posts:
+                    # Fallback: separar contenido por doble salto de línea
+                    thread_posts = [p.strip() for p in post.content.split("\n\n") if p.strip()]
+            except json.JSONDecodeError:
+                thread_posts = [p.strip() for p in post.content.split("\n\n") if p.strip()]
+
+            # Publicar como hilo
+            result = run_async(
+                publisher.publish_thread(thread_posts)
+            )
+        else:
+            # Publicación normal
+            content = post.get_content_for_platform(platform)
+            result = run_async(
+                publisher.publish(content, post.image_url)
+            )
 
         if result.success:
             # Guardar ID del post en la plataforma