Security and robustness:
- EXIF orientation is now applied before any geometry. Phone photos carry the
rotation only as metadata; sharp was cropping the unrotated raster, so a
portrait shot came out of the printer sideways and wrongly framed.
- renderCell no longer materialises the padded image at source resolution.
It is one extract-resize-extend chain now, which is also sharp's internal
order. A panorama into a narrow contain target used to build a ~960 MB
intermediate and then fail; it is 90 ms and a few MB now.
- Target size is capped (300 Mpx) and bleedMm is clamped in /api/print/single,
which had no bound at all.
- The delivery gallery is validated before use - posixpath.join let a crafted
name escape the target's base folder and create directories there.
- Sheet requests are capped at 500 pieces and the packer has a step budget, so
a degenerate request cannot block the single-threaded server.
- Print presets: delete only your own (admins all), config size limit, count
limit, and by_name honours anonymous_generations.
- Telegram callbacks require an active pairing, like every other path.
- Error responses no longer leak storage paths or delivery hostnames.
Correctness:
- allowRotate:undefined now means allowed, consistently with the packer.
- The many-formats shortcut no longer drops a format that only fits rotated.
- unplaced names the format that is actually missing, not the first one.
- Crop marks never sit inside the printed bleed - the offset is raised.
- capacity() computes the grid instead of probing with 200 copies.
- Image keys in the sheet cannot collide with a cell literally named x::rot.
- labelMm keeps real decimals; parseSizeMm reads a:b as width:height, so
3:4/15 is portrait and 4:3/15 is landscape.
- The footer is skipped when there is no free space at the bottom.
- The UI warns when corner marks do not fit the margin, and when continuous
guides are used with mixed sizes.
Tests: 21 -> 31, each finding has a regression test.
renderCell brings a relative crop onto an exact physical size; missing bleed
pixels are copied from the edge instead of stretching the motif. Without a
crop it falls back to a centred cover crop, never a distorted fill.
buildSheetPdf writes a PDF page that is exactly the sheet size in mm with
hairline crop marks and an optional footer. Source resolution guards uploads
to the sources/ prefix and reuses the library visibility rules.
till