Sharp's prebuilt libvips lacks HEIF codec support. Replace with
heic-convert (pure JS decoder) for reliable HEIC conversion on all
platforms. Existing HEIC files on disk will be converted on-the-fly
when served via /api/files.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
denshooter