feat: add BlockVariant for named widget block styles#95
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Visit the preview URL for this PR (updated for commit da2d9f7): https://superdeck-dev--pr95-feat-block-variant-s-h1rvy6c7.web.app (expires Sun, 09 Aug 2026 15:06:35 GMT) 🔥 via Firebase Hosting GitHub Action 🌎 Sign: bd68fc230762285849207e7e120aaf87cd4ca2f9 |
Adds a default BlockVariant('webview') rule to the base SlideStyle so
webview blocks get zero padding and margin without any stylesheet. Uses
BlockVariant rather than NamedVariant because a plain NamedVariant does
not activate for a rendered widget block.
Regenerated by pod install: adds irondash_engine_context and super_native_extensions pods and the Embed Pods Frameworks build phase so the macOS demo builds without a manual pod install.
SlideParts.background defaults to a transparent BackgroundPart, so a slide with no background (e.g. a chrome-less template) rendered see-through and bled adjacent slides through during cross-fade transitions. Always paint an opaque base color beneath the background part, sourced from a shared constant reused by the app shell letterbox.
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Adds
BlockVariant, an opt-in Mix context selector that lets Dart stylesheets target a namedWidgetBlock(e.g.@webview,@chart) without adding style fields to Markdown, block arguments, or frontmatter. Each widget block now resolves its container style inside an internalBlockVariantScope, so a matching variant affects both the rendered container and the child's calculated size together. ExistingNamedVariantrules and default image/gist spacing are unaffected unless a stylesheet explicitly adds aBlockVariantrule. Includes docs updates fordeck-optionsandmarkdown-syntax, a CHANGELOG entry, and new widget/rendering tests covering matching, sibling isolation, and layout sizing.