Foro: ocultar contador de visitas cuando la columna no existe

- corrige que se mostrara '1 visitas' sin la columna forum_topics.views:
  el incremento y la visualización solo ocurren si has_views_column() es true

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

forum/views.py

@@ -82,6 +82,7 @@ def view_forum(request, forum_id, page=1):
         'forum': forum,
         'topics': topics,
         'pagination': pag,
+        'has_views': db.has_views_column(),
     }))
 
 
@@ -114,10 +115,13 @@ def view_topic(request, topic_id, page=1):
 
     forum = db.get_forum(topic['forum_id'], include_hidden=True)
 
-    # Contador de visitas (si la columna existe)
-    db.increment_views(topic_id)
-    if topic.get('views') is not None:
-        topic['views'] = topic['views'] + 1
+    # Contador de visitas (solo si la columna existe)
+    if db.has_views_column():
+        db.increment_views(topic_id)
+        topic['views'] = (topic.get('views') or 0) + 1
+        topic['has_views'] = True
+    else:
+        topic['has_views'] = False
 
     total = db.count_posts(topic_id)
     pag, offset = _paginate(total, page, settings.FORUM_POSTS_PER_PAGE)