fix(admin-invites): display times in Asia/Shanghai (CST) instead of UTC

app/routers/web.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone, timedelta
 from pathlib import Path
 from uuid import uuid4
 
@@ -35,6 +35,20 @@ def _country_flag(code: str) -> str:
 
 templates.env.filters["flag"] = _country_flag
 
+_CST = timezone(timedelta(hours=8))
+
+
+def _to_local(dt: datetime) -> datetime:
+    """Convert UTC datetime to Asia/Shanghai (CST)."""
+    if dt is None:
+        return None
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=timezone.utc)
+    return dt.astimezone(_CST)
+
+
+templates.env.filters["to_local"] = _to_local
+
 
 def _redirect(url: str) -> RedirectResponse:
     return RedirectResponse(url, status_code=303)