The JavaScript canvas noise loop was replaced with a CSS-only SVG grain filter, an IntersectionObserver was added to pause rendering when off-screen, and prefers-reduced-motion support was wired into both the component and the tactical stylesheet. - #192
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…in filter, an IntersectionObserver was added to pause rendering when off-screen, and prefers-reduced-motion support was wired into both the component and the tactical stylesheet. The original AnimatedNoise component ran a requestAnimationFrame loop that allocated and painted random pixel data every frame, causing unnecessary GPU and CPU load on mobile devices. The rewrite removes the canvas entirely and instead renders an SVG feTurbulence texture as a CSS background, which the browser composites on the GPU with near-zero cost. An IntersectionObserver monitors whether the element is in the viewport and drops the animation to zero when it scrolls out of view. A matchMedia listener detects the system prefers-reduced-motion setting and disables the grain animation accordingly. The tactical-command stylesheet was updated with matching keyframes and a reduced-motion media query so the tactical background grain also respects the accessibility preference. The CRT collection preview was already using a static SVG grain and required no changes. Closes PHASE-STELLAR#35
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The original AnimatedNoise component ran a requestAnimationFrame loop that allocated and painted random pixel data every frame, causing unnecessary GPU and CPU load on mobile devices. The rewrite removes the canvas entirely and instead renders an SVG feTurbulence texture as a CSS background, which the browser composites on the GPU with near-zero cost. An IntersectionObserver monitors whether the element is in the viewport and drops the animation to zero when it scrolls out of view. A matchMedia listener detects the system prefers-reduced-motion setting and disables the grain animation accordingly. The tactical-command stylesheet was updated with matching keyframes and a reduced-motion media query so the tactical background grain also respects the accessibility preference. The CRT collection preview was already using a static SVG grain and required no changes.
Closes #35