* ✨ Add visibility toggle for strokes
* ♻️ Use single emit! call for stroke visibility toggle
* 💄 Disable stroke controls when hidden, matching shadow/blur pattern
When a stroke is hidden, the alignment/style selects, cap selects, and
cap switch button are now disabled. A .hidden CSS class dims the
options area with reduced opacity. This matches the existing behavior
in shadow_row and blur menu where controls are disabled when the
effect is hidden.
* 💄 Move stroke hide button before remove button
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Signed-off-by: eureka928 <meobius123@gmail.com>
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