add timezone support, tons of CSS and layout improvements, more detailed snapshot admin form info, ability to sort by recently updated, better grid view styling, better table layouts, better dark mode support

archivebox/index/json.py

@@ -5,7 +5,7 @@ import sys
 import json as pyjson
 from pathlib import Path
 
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import List, Optional, Iterator, Any, Union
 
 from .schema import Link
@@ -44,7 +44,7 @@ def generate_json_index_from_links(links: List[Link], with_headers: bool):
         output = {
             **MAIN_INDEX_HEADER,
             'num_links': len(links),
-            'updated': datetime.now(),
+            'updated': datetime.now(timezone.utc),
             'last_run_cmd': sys.argv,
             'links': links,
         }