basically refactored the email viewer

maildir_gtd/widgets/EnvelopeHeader.py

@@ -2,6 +2,9 @@ from textual.reactive import Reactive
 from textual.app import ComposeResult
 from textual.widgets import Label
 from textual.containers import Horizontal, ScrollableContainer
+from datetime import datetime
+import re
+from datetime import UTC
 
 
 class EnvelopeHeader(ScrollableContainer):
@@ -55,8 +58,49 @@ class EnvelopeHeader(ScrollableContainer):
     #     self.query_one("#from").update(from_)
 
     def watch_date(self, date: str) -> None:
-        """Watch the date for changes."""
-        self.query_one("#date").update(date)
+        """Watch the date for changes and convert to local timezone."""
+        if date:
+            try:
+                # If date already has timezone info, parse it
+                if any(x in date for x in ['+', '-', 'Z']):
+                    # Try parsing with timezone info
+                    try:
+                        # Handle ISO format with Z suffix
+                        if 'Z' in date:
+                            parsed_date = datetime.fromisoformat(date.replace('Z', '+00:00'))
+                        else:
+                            parsed_date = datetime.fromisoformat(date)
+                    except ValueError:
+                        # Try another common format
+                        parsed_date = datetime.strptime(date, "%Y-%m-%d %H:%M%z")
+                else:
+                    # No timezone info, assume UTC
+                    try:
+                        parsed_date = datetime.strptime(date, "%Y-%m-%d %H:%M").replace(tzinfo=UTC)
+                    except ValueError:
+                        # If regular parsing fails, try to extract date components
+                        match = re.search(r"(\d{4}-\d{2}-\d{2})\s+(\d{2}:\d{2})", date)
+                        if match:
+                            date_part, time_part = match.groups()
+                            parsed_date = datetime.strptime(
+                                f"{date_part} {time_part}", "%Y-%m-%d %H:%M"
+                            ).replace(tzinfo=UTC)
+                        else:
+                            # If all else fails, just use the original string
+                            self.query_one("#date").update(date)
+                            return
+
+                # Convert to local timezone
+                local_date = parsed_date.astimezone()  # Convert to system's local timezone
+
+                # Format for display
+                formatted_date = local_date.strftime("%a %b %d %H:%M (%Z)")
+                self.query_one("#date").update(formatted_date)
+            except Exception as e:
+                # If parsing fails, just display the original date
+                self.query_one("#date").update(f"{date}")
+        else:
+            self.query_one("#date").update("")
 
     # def watch_cc(self, cc: str) -> None:
     #     """Watch the cc field for changes."""