Compression re-encodes through a canvas to JPEG. Only PNG was skipped,
so a transparent WebP came out on a black background, and an animated
GIF or WebP became one still frame. GIF and APNG are no longer offered;
an animated WebP (VP8X animation flag) or any image with a transparent
pixel is kept as the original.
Fixes#331
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
Coverage work found a 3rd real bug: isMacOS() compared os.name against the
legacy 'Mac OS' string, but ua-parser-js v2 reports 'macOS' — so it was dead,
and Mac users saw "Ctrl + k" instead of "⌘ + k" in the editor toolbar, search,
and settings shortcut hints. Now accepts both 'macOS' and 'Mac OS'.
Suites (via subagent, verified): via-servers (10 — power/popularity server
selection), bad-words (9), syntaxHighlight tokenize (14), plugins/utils
getEmoticonSearchStr (5), imageCompression formatFileSize/isCompressible (5),
user-agent (6, now asserting the fixed behavior).
Full suite now 501 tests, all passing.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>