- UnifiedQueryPanel: fix JS operator precedence — .replace(' ','T') was
called on '.000Z' suffix instead of concatenated string, resulting in
'2026-06-27 12:46:28.000Z' (space not replaced) → ES 502
- normalizeTime: add space→T fallback for backward compat
- SyntaxHighlightInput: fix z-index layering (textarea z=2 was covering
pre z=1, making highlighted text invisible). Move bg/border to parent,
textarea bg→transparent, pre above textarea