* ✨ Enable stroke-per-side flag
* 🐛 Fix stroke per side tests for the enabled flag
The default flags now include :enable-stroke-per-side, so
frontend tests and Playwright specs that assumed the flag
was off need to turn it off explicitly.
Update the token context menu test expectations: rects and
boards now expose the stroke-width submenu, and force the
flag off in the "per-side is disabled" cases.
Pass disable-stroke-per-side in the two Playwright specs
that check the flag-off behavior, since app.config always
merges the default flags.
AI-assisted-by: deepseek-v4.1-flash
8f1100d0f5