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Introduce a moxieapps-Highcharts Time wrapper (useUTC/timezone/timezoneOffset) and Highcharts.Options.setTime(Time), and switch the vertical wind chart and the device-mapping chart to render datetime axes in the browser's local time zone. With the bundled Highcharts 12.1.2 the browser-local zone is selected via useUTC=false (equivalent to timezone=undefined); the v11-only special value "local" is no longer valid in v12. Also ensure the global time option is applied via Highcharts.setOptions(...) before the affected Chart is constructed, since setOptions only affects charts created afterwards. Assisted-By: Claude (claude-4.8-opus)