fluid-sim embed: slow/glitchy when iframed on nimbleco-site (Cloudflare Pages)

[juniperbevensee]

The ASCII fluid sim at embeds/fluid-sim.html runs noticeably slow + glitchy embedded as the hero iframe on https://nimbleco-site.pages.dev (reported by Juniper 2026-07-24). Not a hosting issue — the embed is served from GitHub Pages either way; it's sim CPU cost at full container resolution inside a busy page.

Candidate fixes: cap FPS; scale grid resolution to container size / devicePixelRatio; pause via IntersectionObserver when offscreen; accept a ?quality= param the embedding page can set.

🤖 Generated with Claude Code

[juniperbevensee]

Vendored a perf-patched copy into NimbleCoOrg/nimbleco-site (public/embeds/fluid-sim.html) — 30fps cap via rAF frame-skip, ~9k render-cell cap with proportional font scaling on large containers, and full pause (IntersectionObserver + visibilitychange) when offscreen/hidden. The nimbleco.ai hero now uses the same-origin vendored copy. Leaving this issue open: the canonical brandkit embed is still unpatched — upstream these three fixes so other embedders benefit.