Format last eval timestamp as UTC+8

src/display/formatting.py

@@ -1,3 +1,20 @@
+from datetime import datetime, timedelta, timezone
+
+UTC8 = timezone(timedelta(hours=8))
+
+
+def format_timestamp_utc8(iso: str) -> str:
+    """Format ISO-8601 timestamp as readable UTC+8 datetime."""
+    if not iso or iso == "n/a":
+        return "n/a"
+    try:
+        dt = datetime.fromisoformat(iso.replace("Z", "+00:00"))
+        local = dt.astimezone(UTC8)
+        return local.strftime("%Y-%m-%d %H:%M:%S") + " (UTC+8)"
+    except (ValueError, TypeError):
+        return iso
+
+
 def model_hyperlink(model_link: str, code_link: str, model_name: str) -> str:
     if not model_link:
         return model_name