/**
 * SF Pro font files on disk for @resvg/resvg-js consumption.
 *
 * Why this exists: Resvg-js 2.6.2 cannot load fonts from in-memory buffers,
 * and it does NOT honor `@font-face url('data:font/woff2;base64,…')`
 * declarations inside an SVG `<defs><style>` block. It only reads fonts
 * from on-disk files (`fontFiles`) or directories (`fontDirs`).
 *
 * The browser-bar rendering pipeline (`generateBrowserBarSvg` →
 * `rasterizeSvg` in mockup.ts) used to rely on the SVG <defs><style>
 * @font-face approach. That silently fell back to system fonts
 * (DejaVu/Liberation on Vercel Linux) — empirically verified by rendering
 * the same SVG with and without `font.fontFiles` and observing the output
 * change only when `fontFiles` is provided.
 *
 * This module decompresses the SF Pro Text Regular/Semibold woff2 data URIs
 * from `sf-pro-fonts.ts` to TTF and writes them to `os.tmpdir()`, returning
 * the file paths so callers can pass them to `new Resvg(svg, { font:
 * { fontFiles: paths, loadSystemFonts: false } })`.
 *
 * Caching: paths are memoized per-process. On Vercel Fluid Compute the
 * instance is reused across requests so the woff2→ttf decompression and
 * disk writes happen at most once per cold start (~200ms total).
 *
 * Concurrency: two requests arriving before the first decompression
 * finishes share a single in-flight Promise (no double work, no
 * partial-file races).
 *
 * Robustness: if /tmp gets wiped between requests on the same instance
 * (rare but possible), `fs.access` detects the missing files and a fresh
 * init re-writes them.
 *
 * Windows-safe: uses `os.tmpdir()` + `path.join` (no hard-coded /tmp/),
 * `fs.chmod` is intentionally skipped (no-op on NTFS anyway), no bash-isms.
 */
/**
 * Returns the absolute paths to SF Pro Text Regular + Semibold TTF files on
 * disk, suitable for `font.fontFiles` on a `new Resvg(svg, { … })` call.
 *
 * First call: decompresses woff2 → TTF and writes to `os.tmpdir()`. Subsequent
 * calls: returns cached paths in O(2) `fs.access` checks (skipped after a
 * single confirmed lookup per process — see implementation).
 */
export declare function getSfProResvgFontFiles(): Promise<string[]>;