v0.9.0

v0.9.0 — HTML blocks: interactive docs inside pages

Pages can now embed self-contained interactive HTML documents — option pickers,
forms, little tools — rendered live, with a data channel back to the page.

HTML blocks

• /html in the page editor: paste a complete HTML doc or import a .html
  file. Rendered in a sandboxed iframe (allow-scripts, never
  allow-same-origin): scripts run, but the doc has no cookies, no app API, no
  parent DOM, no network identity. 512 KB doc cap with a clear error.
• Data back: the doc calls window.trame.send(data) and the result is
  persisted on the block (64 KB cap), synced like any page edit, and shown as a
  data chip in the block header (hover to inspect, click to copy). On reload
  the block replays saved data via a trame:init event so the doc restores its
  state.
• Sizing: auto-height via the bridge; drag the strip under a block to pin a
  height, auto to unpin.

Agents

• trame_html (MCP): drop an interactive doc onto a page — append, replace
  an existing block, or create a new page around it. trame_html_data reads
  back what the user picked. An agent can now ask a visual question and read the
  answer — no clipboard round-trip.

Public links

• HTML blocks render in shared /l/<token> pages through the same sandboxed
  iframe with auto-height. The data-back channel is off there — public viewers
  see the doc, they can't write to the block.