feat: Send Threads posts to Telegram for easy copy-paste

When generating manual Threads posts, now sends each post directly
to Telegram with:
- Content wrapped in backticks (easy to copy)
- Quality score and category info
- Direct link to open Threads
- Character count

This enables a workflow where posts are generated automatically
and the user just needs to copy from Telegram and paste in Threads.

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

worker/tasks/generate_content.py

@@ -554,12 +554,15 @@ def generate_threads_manual_posts(count: int = 2):
     """
     Generar posts para Threads que se publicarán manualmente.
 
-    Genera tips de tecnología variados optimizados para Threads
-    y los guarda con status 'draft' para copiar y publicar manualmente.
+    Genera tips de tecnología variados optimizados para Threads,
+    los guarda con status 'draft' y envía notificación a Telegram
+    con el contenido listo para copiar.
 
     Args:
         count: Número de posts a generar (default 2)
     """
+    from app.services.notifications import telegram_notify
+
     db = SessionLocal()
 
     try:
@@ -606,16 +609,35 @@ def generate_threads_manual_posts(count: int = 2):
             )
 
             db.add(post)
-            created.append(category)
+            db.flush()  # Para obtener el ID
+            created.append({"category": category, "post_id": post.id, "content": content})
+
+            # Enviar notificación a Telegram con el contenido
+            quality_score = result.get("quality_score", "N/A")
+            telegram_message = (
+                f"🧵 *Nuevo post para Threads*\n"
+                f"📂 Categoría: {category}\n"
+                f"⭐ Calidad: {quality_score}/100\n\n"
+                f"━━━━━━━━━━━━━━━━━━━━━\n"
+                f"📋 *COPIAR Y PUBLICAR:*\n"
+                f"━━━━━━━━━━━━━━━━━━━━━\n\n"
+                f"`{content}`\n\n"
+                f"━━━━━━━━━━━━━━━━━━━━━\n"
+                f"🔗 [Abrir Threads](https://threads.net)\n"
+                f"📱 Post #{post.id} | {len(content)} caracteres"
+            )
+
+            run_async(telegram_notify(telegram_message, parse_mode="Markdown"))
 
         db.commit()
 
-        logger.info(f"Generados {len(created)} posts para Threads (manual): categorías={created}")
+        logger.info(f"Generados {len(created)} posts para Threads (manual): categorías={[c['category'] for c in created]}")
 
         return {
             "status": "success",
             "generated": len(created),
-            "categories": created
+            "categories": [c["category"] for c in created],
+            "post_ids": [c["post_id"] for c in created]
         }
 
     except Exception as e: