* 🐛 Fix restrict per-side stroke width tokens to rectangles in plugins API
* ♻️ Reuse per-side stroke restriction check across plugin API
Move the per-side stroke width restriction into the public
`per-side-stroke-attrs-restricted?` helper, now taking `page-id`, and reuse
it from both `shape.applyToken` and the token application path. Keep the
error message in a single `per-side-stroke-widths-message` def used by all
three rejection sites.
Wait for token resolution in the uniform stroke width regression test
instead of relying on a bare `settle`, which could assert before the
applied token lands.
AI-assisted-by: deepseek-v4.1-flash
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Co-authored-by: Luis de Dios <luis.dedios@kaieldos.net>
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