fix: unread badge counts only new conversation system, removes legacy PM/group counting

Legacy private_messages and group_messages are no longer used.
Badge now only counts from conv_messages table.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

blueprints/messages/routes.py

@@ -643,34 +643,12 @@ def messages_reply(message_id):
 @login_required
 @member_required
 def api_unread_count():
-    """API: Liczba nieprzeczytanych wiadomości (1:1 + grupowe)"""
+    """API: Liczba nieprzeczytanych wiadomości (nowy system konwersacji)"""
     db = SessionLocal()
     try:
         from sqlalchemy import func
-        from database import MessageGroupMember, GroupMessage
-
-        # 1:1 unread
-        pm_count = db.query(PrivateMessage).filter(
-            PrivateMessage.recipient_id == current_user.id,
-            PrivateMessage.is_read == False
-        ).count()
-
-        # Group unread
-        group_count = 0
-        memberships = db.query(MessageGroupMember).filter(
-            MessageGroupMember.user_id == current_user.id
-        ).all()
-        for m in memberships:
-            q = db.query(func.count(GroupMessage.id)).filter(
-                GroupMessage.group_id == m.group_id,
-                GroupMessage.sender_id != current_user.id
-            )
-            if m.last_read_at:
-                q = q.filter(GroupMessage.created_at > m.last_read_at)
-            group_count += q.scalar() or 0
-
-        # Conversations unread (new messaging system)
         from database import ConversationMember, ConvMessage
+
         conv_count = 0
         conv_memberships = db.query(ConversationMember).filter(
             ConversationMember.user_id == current_user.id,
@@ -685,7 +663,7 @@ def api_unread_count():
                 q = q.filter(ConvMessage.created_at > cm.last_read_at)
             conv_count += q.scalar() or 0
 
-        return jsonify({'count': pm_count + group_count + conv_count})
+        return jsonify({'count': conv_count})
     finally:
         db.close()