CLI: add UTC suffix to timestamps, validate image extensions on
single-file input, canonicalize watch paths for reliable matching,
derive counter_enabled from template presence, warn when undo count
exceeds available batches.
Core: apply space/special-char transforms in template rename path,
warn on metadata preservation for unsupported formats, derive AVIF
speed from compress preset quality level.
GTK: use buffer size for apples-to-apples compress preview comparison,
shorten approximate format labels, cache file sizes to avoid repeated
syscalls on checkbox toggle, add batch-update guard to prevent O(n^2)
in select/deselect all, use widget names for reliable progress/log
lookup, add unique suffix for duplicate download filenames.
lashman
9fcbe237bd