The desktop app's ui.render (MCP `screenshot` when connected) always rendered the first
artboard and ignored `artboard`, which the headless backend honours.
It now renders the 0-based `artboard` (the first without one, an error for one that doesn't
exist), as headless does. control-protocol.md and the control.rs list show the parameter.
The test drives ui.render through the control channel on a 64 x 64 and a 96 x 48 artboard:
no index and 0 give 64 x 64, 1 gives 96 x 48 (48 x 24 at scale 0.5), 2 is an error.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
# Conflicts:
# ROADMAP.md
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