- Added isImageFile() filter to all drop handlers (dropzone, collage,
file-upload-area) so PDFs and non-image files are rejected on drop.
Previously only the file picker's accept attribute filtered; drag-and-
drop accepted anything.
- Added ppm, pgm, pbm to CLI_DECODED_FORMATS in file-validation.ts.
These formats were missing, causing Sharp metadata checks to fail for
some files during batch validation, which silently dropped them from
results ("File not found in batch results").
- Added integration tests for PBM, PGM, PPM, TIFF, QOI, JP2, SVGZ
single-file processing, plus a test confirming PDF is rejected.
The binary search found the right quality but sharp(buffer).toBuffer()
re-encoded at default quality 80, inflating the output (e.g. 50KB target
producing 90KB). Replaced buffer-wrapping with proper Sharp pipelines
that include .toFormat() with the proven quality. Also added progressive
dimension reduction when quality alone cannot reach the target, and
tightened tolerance to only accept at-or-below-target results.
SnapOtter