* fix(core): let fill text share an auto-layout row
Fill frames grow and shrink from a zero flex basis, so fill siblings split a row's free space. Fill text only got flexGrow, and its measure function capped it at its stored width, 100px for new text, so seven fill labels in a 280px row each kept 100px and overflowed. Without a measurer, the fallback pinned that width and set no grow at all. Fill text now uses the same zero basis as fill frames on both paths.
* fix(design-jsx): read repeat() and minmax() in grid tracks
Track lists were split on whitespace, so columns="repeat(7, 1fr)" became the tracks repeat(7, and 1fr), read as fixed 0px and 1px columns that collapsed the grid. Tokens inside parentheses now stay together, repeat() expands its tracks, minmax() grows like its maximum, and a track the grid cannot express sizes to its content instead of to 0.
* refactor(scene-graph): parse CSS grid tracks with postcss-value-parser
design-jsx read repeat() and minmax() with a hand-written tokenizer and regexes, while dom-css already parses CSS values with postcss-value-parser. Track lists are now parsed in @open-pencil/scene-graph/css on that library, where both packages can use it, and design-jsx calls it. dom-css's hand-written declaration of the library's types is replaced by the types the library ships, which the shared module needs. The Scene Graph guide records that CSS values are parsed there.
Three defects a confidential Figma file surfaced, each reproduced by a
test that fails without the change.
A page's background lived only in viewport state, so an imported canvas
colour never reached the canvas and an edit was lost on the next page
switch or save. It is read from and written to the page's paints, which
the Figma API and export already carry.
Fixed-size text in a Hug container reported no intrinsic cross-axis
size, so a stretched label collapsed and clipped beside smaller
siblings. Yoga now measures it.
Populating a page resynchronised an instance whose text the file had
already resolved, replacing it with the component's default.
Co-authored-by: Victor Wads <victor@wads.dev>
