v2.4.1 - clean uninstall

What's changed

Cleaner uninstall. The Windows uninstaller now also removes the downloaded
playback engine (libmpv-2.dll), the install folder, and your
%LOCALAPPDATA%\Leike settings — so a later reinstall starts fresh (default
format H.264). Previously those were left behind.

This is an installer-only patch — the app itself, the portable build, and the
macOS/Linux builds are identical to v2.4
(H.265 & AV1 export).

Downloads

• Windows installer — Leike-Setup.exe (ffmpeg bundled; per-user, no admin
  prompt). This is the build with the cleaner uninstall.
• Windows portable — Leike-portable-win64.zip (unzip and run; ffmpeg
  bundled).
• Windows standalone — Leike.exe (drop an ffmpeg.exe beside it, or use
  the installer / portable).
• macOS (Apple Silicon) — Leike-macOS-arm64.zip (brew install ffmpeg
  first; first launch: right-click → Open).
• Linux (x86_64) — Leike-linux-x86_64.tar.gz (install ffmpeg with your
  package manager).