Release v4.15.1

Fixed

• CommandStepper and StepperCommandDialog now call onChangeStep({ index }) once for every accepted move to a different step: header clicks, Previous, and Next. Previous and Next never reported a change before, and a header click reported one even when the move was then rejected. (#249)
• Each stepper panel is now labelled by its step header through aria-labelledby. If you pass pt.header.id, your id is kept and the panel keeps its text label. The wizard stays an ordered list of steps rather than ARIA tabs. (#249)
• PivotViewer boolean dimensions now group into true and false columns, and their categorical filters narrow the cards, including the None and Unknown options for missing values. (#334)
• PivotViewer keeps missing values missing instead of turning them into the text undefined, and infers each column's type from its first non-missing value. Missing numbers sort last. Because of this, a numeric column whose first value is missing is now treated as numeric, so a categorical selection on it no longer narrows the cards, as for every other numeric column. (#334)
• PivotViewer now applies a dimension's declared formatValue to column labels and sort to column order. Changing either no longer re-runs the grouping. (#334)
• PivotViewer no longer renders an empty viewport after regrouping or filtering when the new layout's first entries are off-screen. Cards that intersect the viewport are drawn during the transition, and cards that move off-screen are released when it ends. Refs #236: the intermittent crash reported there is not reproduced, so that issue stays open.
• A non-modal ChatSidebar can now be rendered open on the server. It portals after mount into the CratisComponentsProvider overlay container, and falls back to document.body when there is none. (#339)
• The non-modal ChatSidebar now plays the same open and close animation as the modal one, and skips it when the user prefers reduced motion. (#339)

Changed

• yarn ci in Source now also runs the public API TSDoc check and the packed-archive CSS budget check, which previously ran only in GitHub CI.