- Add useAnimationLoop hook with FPS throttling (30fps mobile/60fps desktop),
Page Visibility API pause, and Telegram WebApp activated/deactivated events
- Add useAnimationPause hook for CSS/Framer Motion components
- Validate animation config with type allowlist, numeric clamping, JSON size guard
- Move ctx.setTransform from per-frame to init/resize across all canvas backgrounds
- Move ctx.lineCap to init/resize in vortex, replace Float32Array.set with direct writes
- Pre-compute shooting star delay instead of per-frame Math.random
- Cap DPR to 1.5 on mobile, reduce particle counts, cap blur to 4px
- Disable aurora CSS animation on mobile, remove blur on mobile spotlight
- Remove mix-blend-hard-light on mobile gradient-animation
- Add NaN/Infinity guard to clampNumber, remove dead CSS variables
- Add conditional unmount for Framer Motion backgrounds when paused
- Add animationPlayState pause for CSS-animated backgrounds
Root cause: 225 individually animated DOM elements forced Chrome's
compositor to create separate paint regions per element. Any hover
state change on page content triggered re-compositing of all 225
regions, causing visible flickering on all pages.
Canvas fix: single <canvas> element renders the entire grid effect
via requestAnimationFrame. Canvas content is pixel-based and cannot
be affected by DOM hover state changes on other elements.
Additional fixes:
- Fix z-index collision: portal z-index -1 → -2 (was same as body::before noise)
- Replace all transition-all with specific properties on .btn, .btn-icon,
.input, .nav-item, .bottom-nav-item, checkbox
- Remove backdrop-blur-sm from desktop .bento-card and .card
(forced Chrome to re-sample animated background pixels on every hover)
Previous isolation:isolate fix didn't work because:
- position:fixed elements still see through isolation boundary
- backdrop-filter samples all rendered content regardless of stacking context
- The real issue: animated background at z-index:0 with will-change:transform
forces Chrome to implicitly composite EVERY overlapping element
Fix: render BackgroundRenderer via createPortal on document.body with
z-index:-1, placing it below the root stacking context. This eliminates
implicit compositing entirely.
Also:
- Remove backdrop-blur-xl from desktop header (was resampling bg 60fps)
- Remove will-change:opacity from card ::after pseudo-element
- Replace transition-all with transition-colors on header buttons
Root cause: backdrop-filter on header/nav resamples the animated
background 60fps, causing GPU compositing flicker (Chromium bug).
- Add isolation: isolate wrapper in AppShell to prevent backdrop-filter
from seeing through to the animated background layer
- Add will-change: transform + translateZ(0) to BackgroundRenderer
for stable GPU layer
- Replace contain: layout style with contain: content on main
- Replace transition-all with specific properties in Card component
- Add prefetchBackground() to registry — triggers dynamic import
without creating React component
- Call prefetch at module init in BackgroundRenderer using cached
config from localStorage, before React renders
- Background JS chunk starts downloading immediately instead of
waiting for Suspense to trigger lazy() import
