Add 'from_name' field to SMTP settings and update email sending logic

- Introduced a new 'from_name' field in the SMTP settings to allow users to specify a sender name.
- Updated the dashboard template to include an input for the sender name.
- Modified the email sending logic to format the 'From' header with the sender name if provided, enhancing email presentation.

app/services/smtp_sender.py

@@ -2,6 +2,7 @@ import smtplib
 from datetime import datetime
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
+from email.utils import formataddr
 from typing import Sequence
 
 from sqlalchemy.orm import Session
@@ -18,6 +19,7 @@ def get_smtp_settings(db: Session) -> dict[str, str]:
         "username": get_config(db, "smtp.username", ""),
         "password": get_config(db, "smtp.password", ""),
         "from_email": get_config(db, "smtp.from_email", ""),
+        "from_name": get_config(db, "smtp.from_name", ""),
         "reply_to": get_config(db, "smtp.reply_to", ""),
         "use_tls": get_config(db, "smtp.use_tls", "true"),
         "recipients": get_config(db, "smtp.recipients", ""),
@@ -90,7 +92,10 @@ def send_newsletter(
     msg.attach(MIMEText(text_content, "plain", "utf-8"))
     msg.attach(MIMEText(html_content, "html", "utf-8"))
     msg["Subject"] = subject
-    msg["From"] = settings["from_email"]
+    if settings.get("from_name"):
+        msg["From"] = formataddr((settings["from_name"], settings["from_email"]))
+    else:
+        msg["From"] = settings["from_email"]
     msg["To"] = ", ".join(recipients)
     if settings.get("reply_to"):
         msg["Reply-To"] = settings["reply_to"]