The bundled Skia x64 build (document thumbnails, scanned-PDF rasterization)
uses AVX2 instructions; on an x86-64 host without them — Celeron/Atom-class
NAS CPUs, pre-2013 Xeons, VMs masking CPU flags — the first canvas call is an
uncatchable SIGILL that kills the process and crash-loops the container (live
incident: a Synology DS1520+, exit 132 ~18 s after every boot, reported with
kernel traps and the correct root cause in hand).
The renderer is now gated on a one-time CPU-feature check before the module
ever loads: linux/x64 requires the avx2 cpuinfo flag; arm64 and non-Linux are
unaffected; unreadable cpuinfo fails open. Behind a closed gate, thumbnail
generation and PDF rasterization take their existing fail-soft paths (vault
shows type icons; PDFs read as text) and the boot-time thumbnail backfill
skips enqueueing. NATIVE_CANVAS=off|on overrides detection, documented in the
env example and whitelisted in compose.
Dashboard layout changes take effect immediately: the save now evicts the
locale-keyed home-screen snapshot it previously missed, so a re-ordered or
toggled tile set no longer reverts to the prior selection for the SWR window.
A share link built with a narrowed report-section selection now serves exactly
that selection. The stored selection is the grouped export shape; the shared
view read it through the flat parser, which dropped every grouped toggle and
fell back to the full defaults — an over-share against the owner's choice. The
view now folds the grouped shape down faithfully. Documents-only shares were
never affected.
Hardening: the shared-document download path now sanitises the filename
identically to the owner download path, and thumbnail generation re-checks the
pixel ceiling after decode so a malformed image that slips past the header
sniff still cannot exhaust the worker.
Document vault shows a per-file thumbnail: a server-rendered preview,
downscaled and re-encoded so location and camera metadata are dropped,
served only to the file's owner over an authenticated request. Files that
cannot be previewed keep their type icon. Generation is bounded — a header
sniff refuses an over-large source before decode, so a crafted image cannot
exhaust the preview worker.
Also folds in admin-managed central AI access — an administrator connects
one access on the server and each user opts in or keeps their own provider,
off until an admin turns it on — and trims the redundant documents-search
caption and per-file searchable/read badges.
Render a small JPEG preview for each stored document and show it at the
card's leading edge, falling back to the kind icon when none exists.
- Generate previews in the background on upload (new document-thumbnail
pg-boss queue) plus a boot-time corpus backfill for existing documents;
upload never blocks on or fails because of it. Images are downscaled via
@napi-rs/canvas, a PDF's first page is rasterised then downscaled, every
other type is skipped. Generation never throws.
- Store the preview encrypted at rest in a 1:1 DocumentThumbnail side table
(migration 0236) so the list/detail queries that omit the original blob
never drag the preview either. Same AES-256-GCM string codec + fail-closed
decrypt as the content index; wired into the key-rotation walk.
- Serve it through an owner-scoped GET /api/documents/inbound/[id]/thumbnail
(auth + module gate + userId-scoped query + fail-closed decrypt), always
image/jpeg + nosniff + private, no-store; 404 on miss. The card renders an
authed lazy <img>, onError falls back to the icon.
- Add hasThumbnail to the document DTO so the card only fetches a preview
that exists.
Also drop the "search looks inside your documents" caption from the overview
(the index-all prompt stays) and the per-card searchable marker; both were
noise. Remove the now-unused i18n keys across all six locales.
Marc-André Bombeck