feat: Add email settings management and templates functionality

- Implemented email settings configuration in the admin panel, allowing for SMTP settings and notification preferences.
- Created a new template for email settings with fields for SMTP host, port, username, password, sender address, and recipients.
- Added JavaScript functionality to handle loading, saving, and validating email settings.
- Introduced email templates management, enabling the listing, editing, and saving of email templates.
- Updated navigation to include links to email settings and templates.
- Added tests for email settings and templates to ensure proper functionality and validation.

server/services/contact.py

@@ -6,12 +6,12 @@ import smtplib
 from dataclasses import dataclass
 from datetime import datetime, timezone
 from email.message import EmailMessage
-from typing import Any, Dict, Tuple
+from typing import Any, Dict, Tuple, cast
 
-from .. import settings
 from ..database import save_contact
 from ..metrics import record_submission
 from ..utils import is_valid_email
+from .email_settings import load_effective_smtp_settings
 
 
 @dataclass
@@ -70,12 +70,22 @@ def persist_submission(submission: ContactSubmission) -> int:
 
 def send_notification(submission: ContactSubmission) -> bool:
     """Send an email notification for the submission if SMTP is configured."""
-    if not settings.SMTP_SETTINGS["host"] or not settings.SMTP_SETTINGS["recipients"]:
+    smtp_config = load_effective_smtp_settings()
+
+    if not smtp_config.get("notify_contact_form"):
+        logging.info("Contact notifications disabled; skipping email dispatch")
+        return False
+
+    if not smtp_config.get("host") or not smtp_config.get("recipients"):
         logging.info("SMTP not configured; skipping email notification")
         return False
 
-    sender = settings.SMTP_SETTINGS["sender"] or "no-reply@example.com"
-    recipients = settings.SMTP_SETTINGS["recipients"]
+    sender = smtp_config.get("sender") or "no-reply@example.com"
+    recipients = smtp_config.get("recipients", [])
+    host = cast(str, smtp_config.get("host"))
+    port = int(smtp_config.get("port") or 0)
+    username = smtp_config.get("username") or None
+    password = smtp_config.get("password") or ""
 
     msg = EmailMessage()
     msg["Subject"] = f"Neue Kontaktanfrage von {submission.name}"
@@ -98,12 +108,11 @@ def send_notification(submission: ContactSubmission) -> bool:
     )
 
     try:
-        with smtplib.SMTP(settings.SMTP_SETTINGS["host"], settings.SMTP_SETTINGS["port"], timeout=15) as server:
-            if settings.SMTP_SETTINGS["use_tls"]:
+        with smtplib.SMTP(host, port, timeout=15) as server:
+            if smtp_config.get("use_tls"):
                 server.starttls()
-            if settings.SMTP_SETTINGS["username"]:
-                server.login(
-                    settings.SMTP_SETTINGS["username"], settings.SMTP_SETTINGS["password"] or "")
+            if username:
+                server.login(username, password)
             server.send_message(msg)
         logging.info("Notification email dispatched to %s", recipients)
         return True