Files
hyperframes/packages
ukimsanov 2c9544f6d4 feat(lint): font loading + invalid capture path composition rules
Two new composition lint rules catching failure modes that recurred
across the 11-round website-to-video eval. Both ship with vitest
coverage; total lint suite goes from 148 to 151 tests.

**`fonts.ts` (new) — two warnings**

- `google_fonts_import`: composition loads fonts from
  `fonts.googleapis.com` via `<link>` or `@import url(...)`. External
  font requests fail in sandboxed/offline renders and add latency.
  Fix hint points to root-relative `capture/assets/fonts/...woff2`
  with a local `@font-face` declaration.
- `font_family_without_font_face`: CSS uses a font-family that
  isn't declared with `@font-face` and isn't in the auto-bundled
  font set (Inter, JetBrains Mono, etc.). Text would silently fall
  back to system-ui — the visual fidelity loss the eval kept hitting.
  Fix hint points to the captured woff2 files.

**`composition.ts` invalid_capture_path (new) — one error**

Sub-compositions live in `compositions/` but get served with the
project root as their base URL. `<img src="../capture/...">` works
on disk but 404s in Studio and renders. Errors with a fix hint
saying replace `../capture/` with root-relative `capture/`.
Three vitest cases: `<img>` triggers, multi-occurrence url()s are
counted, root-relative paths stay clean. Registry source files and
installed blocks are exempted.

**Wiring**

`hyperframeLinter.ts` runs the new fonts rules alongside the existing
rule set; the composition rule was added inline so it picks up
automatically.
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