ext-sharp: sharp({ create: {...} }) throws 'Invalid sharp handle'

[proggeramlug]

Env: perry 0.5.1512 built from main@6173ff9f6, macOS arm64. MB24 Phase-0 spike.

Repro:

import sharp from "sharp";
const buf = await sharp({ create: { width: 4, height: 4, channels: 3,
  background: { r: 1, g: 2, b: 3 } } }).png().toBuffer();

Actual: throws the plain string "Invalid sharp handle" (typeof "string"). typeof sharp is "object" (Node: "function", callable either way here).

Expected: sharp's create input (blank canvas) — the standard building block for watermark overlays and placeholder images.

Impact/context: buffer- and file-based inputs untested beyond this (the create path is the first op in our pipeline test). ext-sharp being viable end-to-end (create + resize + composite + metadata/EXIF strip) decides whether MB24 uses sharp or shells out to the vips CLI (which works fine under Perry today, verified on Linux CI). Full test: mobilitybroker24/monorepo spike/tests/11-image-sharp.ts.