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#1004: a connected app's screenshot renders the artboard asked for

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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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bflatastic
2026-10-11 03:51:19 +07:00
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@@ -56,7 +56,7 @@ the two can still win that race.
| `ui.set` | `{brightness?, panel?, rulers?, outline?, grid?, smartGuides?, boundingBox?, controlBar?}` | |
| `ui.dialog.set` / `.confirm` / `.cancel` | `{field, value}` | fill and submit the open dialog |
| `ui.screenshot` | `{path?, data?}` | capture the window (PNG), written to `path`; `data: true` sends it back as `pngBase64` too. Needs a presented frame: with the screen locked or the window minimized/covered it fails after ~8 s with an explanatory error |
| `ui.render` | `{path?, scale?, data?}` | render the artboard headlessly (PNG): written to `path`, else (or with `data: true` as well) sent back as `pngBase64` |
| `ui.render` | `{path?, scale?, artboard?, data?}` | render an artboard headlessly (PNG; `artboard`: its 0-based index, default the first): written to `path`, else (or with `data: true` as well) sent back as `pngBase64` |
| `ui.resize` / `ui.focus` | | |
| `app.open` / `app.save` / `app.export` / `app.quit` | `{path}` / `{path?}` / `{path?, format?, artboard?, range?, scale?, …}` | `app.open` reads every format `document.open` reads (see `document.formats`) and returns its result (`{index, title, format, warnings, …}`; `warnings` say what didn't come in as it was, such as an EPS shown as its preview image and why its PostScript couldn't be read), or null when a dialog asks first or a library loads. `app.export` encodes through the engine's `document.export` (same options; the document keeps its path) and writes `path` through the host; without `path` it returns `{dataBase64, format, bytes}`, as headless mode does. `app.quit`, `file.close` and `file.closeAll` first open a `saveChanges` dialog for each modified document (they return `{"pending": "saveChanges"}`): `ui.dialog.confirm` saves, `ui.dialog.set {field: "discard", value: true}` then confirm discards, `ui.dialog.cancel` cancels the whole close or quit |
| `app.export` with `useArtboards` | `{path, useArtboards: true, range? \| artboards?, …}` | Export As: PNG, JPEG and WebP write one file per chosen artboard (default all; SVG does so for a `range`), `<path stem>-<artboard>.<ext>`, and return `{path, files: [path…]}`; a PDF keeps them as pages of `path`. `useArtboards: false` covers the bounds of the visible art. The menu's Export As… is `file.exportAs`: the `exportAs` dialog (`format`, `useArtboards`, `all`, `range`), then a save dialog and the format's options: `pngOptions` / `jpgOptions` / `webpOptions`, `svgOptions`, or `savePdf` for a PDF with Use Artboards |