working good state

maildir_gtd/actions/newest.py

@@ -0,0 +1,23 @@
+
+import subprocess
+
+def action_newest(app) -> None:
+    """Show the previous email message by finding the next lower ID from the list of envelope IDs."""
+    try:
+        result = subprocess.run(
+            ["himalaya", "envelope", "list", "-o", "json", "-s", "9999"],
+            capture_output=True,
+            text=True
+        )
+        if result.returncode == 0:
+            import json
+            envelopes = json.loads(result.stdout)
+            ids = sorted((int(envelope['id']) for envelope in envelopes), reverse=True)
+            app.current_message_id = ids[0]
+            app.show_message(app.current_message_id)
+            return
+
+        else:
+            app.show_status("Failed to fetch envelope list.", severity="error")
+    except Exception as e:
+        app.show_status(f"Error: {e}", severity="error")