claude-owner 0a09540e9f a11y(prediction): add aria-pressed + type=button to period presets ...

PredictionPanel's 3-segment 예측 기간 control (15일/30일/1년) was the last
segmented control without aria-pressed after slice (n)'s audit. It carried
the visual "pressed" state via className branch but no ARIA attribute, so
screen-reader users got no announcement of the current selection.

Also tighten type="button" to prevent default form submission semantics —
the buttons live outside <form> here, but explicit type is canonical for
non-submit buttons.

Visual styling kept as-is. The slightly heavier active token (bg-zinc-700
solid, px-3 py-1) vs the chart-toolbar canonical (border-zinc-600 bg-zinc-
800/80, px-2 py-0.5) is intentional: these presets live in the card body
next to a primary rose-600 execute button and need more visual weight than
toolbar toggles. Comment documents the reasoning.

2026-06-01 11:17:11 +09:00

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