The first inline frame was a full-width bordered box at a fixed height:
webpage-in-a-rectangle, not a widget. Now the frame disappears into the
message flow:
- Content-driven size. The injected measurer reports height (live) and
intrinsic width (adopted once, so %-width children can't feedback-loop the
frame toward zero). A sparkline shrink-wraps and sits flush left like an
inline image; a full-bleed page measures the whole viewport and stays
column-wide. The height attribute is now only a starting value.
- Theme bridge. A style prelude injects first with the app's resolved theme
tokens under stable names (--foreground, --muted-foreground, --accent,
--border, --card), the app font, zero body margin/padding, and a
transparent background — reference HTML written against those vars renders
native in any theme. Page styles override the prelude, so a page that
brings its own design keeps it.
- No chrome. Border, rounded box, and the rail-opener card under the frame
are gone; the fallback paths (non-HTML, remote gateway, unreadable file)
keep the classic card. The wheel gate went with the border — frames size
to content, so there is nothing to scroll inside, and widgets are fully
interactive.
- The desktop platform hint now teaches the default: an inline widget is
transparent, token-colored, flush left, no page chrome — only a standalone
page brings its own background. "Make me an inline sparkline" gets native
styling without the user spelling it out.
Brooklyn Nicholson
a1fea53454