More monitoring data and measurement export
- Monitoring: CPU clock, CPU performance limits (due to heat, power or the power plan; highlighted when below 100%), used and total video memory. The data comes from Windows counters and the graphics driver; when there is no source, it says "no data" instead of zero.
- History and export: recent measurements (up to an hour at one update every 2 seconds) are kept in memory only; the Export measurements button on the Gaming page saves them as CSV or JSON. An empty value means "not measured".
- Temperatures are not shown yet: there is no reliable documented source without installing our own drivers; they will come through manufacturers' interfaces where available.