fix(core): clamp Slider controlled values

[Kevinjohn]

A controlled Slider no longer renders its thumb or ARIA value outside the declared bounds.

Fixes #4061.

• Expected: value={150} with min={0} and max={100} renders at 100% and exposes aria-valuenow="100".
• Before: the thumb rendered at 150% with aria-valuenow="150".
• After: the controlled value is normalized once for thumb position, filled-track position, display text, and ARIA output.

Actual screenshots

Both captures use the same 300px-wide Storybook reproduction. The 0 and 100 marks make the declared range boundary visible.

Before — 2e2e96046 (origin/main): the 150 value and thumb render well beyond the 100 maximum marker.

After — 277414e3a, same story, args, width, and marks: the thumb and displayed value land directly on 100.

Test plan

• pnpm vitest run packages/core/src/Slider/Slider.test.tsx — 34 passed
• pnpm vitest run --project ui — 4,853 passed
• pnpm --filter @astryxdesign/core typecheck
• pnpm --filter @astryxdesign/core build
• Targeted ESLint and changeset validation

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Project	Deployment	Actions	Updated (UTC)
astryx	Ready	Preview, Comment	Jul 18, 2026 7:49pm

[Kevinjohn]

(wrong screenshots were uploaded - they were test results rather than visual demo)