Add editor exclusion defaults and newsletter filtering controls.

This makes it possible to exclude specific editors (e.g. Aranzinger) from edited-article results by default, including dashboard generation and scheduled SMTP runs.

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

app/services/smtp_sender.py

@@ -8,6 +8,7 @@ from typing import Sequence
 
 from sqlalchemy.orm import Session
 
+from app.core.config import settings
 from app.core.email_utils import parse_recipient_list
 from app.models.system import SendLog
 from app.services.config_store import get_config
@@ -40,6 +41,7 @@ def get_smtp_settings(db: Session) -> dict[str, str]:
         "gen_days": get_config(db, "smtp.gen_days", "30"),
         "gen_article_type": get_config(db, "smtp.gen_article_type", "new"),
         "gen_category": get_config(db, "smtp.gen_category", ""),
+        "gen_excluded_users": get_config(db, "smtp.gen_excluded_users", settings.default_excluded_users),
     }