basically refactored the email viewer

utils/mail_utils/helpers.py

@@ -5,6 +5,7 @@ import os
 import json
 import time
 from datetime import datetime
+import email.utils
 
 def truncate_id(message_id, length=8):
     """
@@ -67,6 +68,24 @@ def format_datetime(dt_str, format_string="%m/%d %I:%M %p"):
     except (ValueError, AttributeError):
         return dt_str
 
+def format_mime_date(dt_str):
+    """
+    Format a datetime string from ISO format to RFC 5322 format for MIME Date headers.
+
+    Args:
+        dt_str (str): ISO format datetime string.
+
+    Returns:
+        str: Formatted datetime string in RFC 5322 format.
+    """
+    if not dt_str:
+        return ""
+    try:
+        dt = datetime.fromisoformat(dt_str.replace('Z', '+00:00'))
+        return email.utils.format_datetime(dt)
+    except (ValueError, AttributeError):
+        return dt_str
+
 def safe_filename(filename):
     """
     Convert a string to a safe filename.