* feat(studio): header and inspector tabs on the shared primitives
The header's view-mode toggle and the inspector's tab strip become real
Tabs, so both gain the roving tabindex, arrow keys and Home/End they never
had; undo, redo and Inspector become IconButton and Button; Export becomes
the primary Button at the medium size. Capture stays an <a download>,
wearing Button's recipe, because a button cannot save a file.
Colour literals in StudioHeader.tsx drop to zero: the brand gradient moves
into theme.css as two tokens and the Export's hand-written text colour
becomes text-bg-0. Ratchet total 475 to 470.
* docs(studio): shorten the header and inspector tab comments to fit the comment gate
* chore(studio): bank the lower colour-literal baseline for StudioHeader
* fix(studio): arrow keys only move focus when the inspector strip toggles panes
* chore(studio): allow deleting PanelTabButton, replaced by the shared Tabs primitive
Miguel Ángel
9bec64a293