Drop the Current/Min/Avg/Max stats row and Live auto-refresh toggle —
clutter that didn't earn its space. Min/max are now rendered as colored
dots on the chart itself (green ▼ for min, orange ▲ for max), which
exposes both the value AND the time-axis position of each extremum at a
glance. Tooltip now formats the timestamp fully (with date prefix when
the sample crosses a day boundary).
Switch CartesianGrid stroke from var(--ant-color-border-secondary) to
rgba(128,128,140,0.35) so the gridlines stay readable in light theme
against the chart-wrap's faint primary tint — the AntD variable
resolved to near-zero alpha and the gridlines disappeared.
XrayMetricsModal keeps its implicit 2s observatory polling.
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