Refactor UI assets and harden quality checks

tests/test_admin_tables.py

@@ -0,0 +1,10 @@
+from karldns.web.templates_admin_tables import _admin_event_row_view
+
+
+def test_admin_event_row_normalizes_missing_values() -> None:
+    row = _admin_event_row_view({"created_at": "", "status": "updated"})
+
+    assert row.created_raw == "-"
+    assert row.hostname_raw == "-"
+    assert row.detail_raw == "-"
+    assert row.count == "1"