ดาวน์โหลด Tenebra 0.5.2

Desktop builds of Tenebra for Windows, macOS and Linux.

**Windows** is user-ready：run the installer (SmartScreen warns on an
unsigned build -> More info -> Run anyway); it sets up the background
service, and the in-app updater keeps both app and service current.

**macOS is for advanced users, not click-to-run yet.** The DMG alone
will NOT give you a working tunnel：macOS needs a root helper daemon
that is currently installed by hand with a sudo script
(scripts/macos/install-daemon.sh), and the build is unsigned (first
launch：System Settings -> Privacy & Security -> Open Anyway). Read
the "macOS note" in the README before downloading. A signed,
click-to-run macOS build is planned.

**Linux**：the Arch package (.pkg.tar.zst) is the click-to-run one
— `pacman -U` installs the app, the core and the systemd unit, and
`systemctl enable --now tenebra` starts the tunnel service. The .deb
and the AppImage install only the app and the core：the privileged
service still has to be set up once by hand with
scripts/linux/install-daemon.sh, because the Debian bundle cannot run
a post-install script. Updates for a packaged install come from your
package manager, not the in-app updater, which only works for the
AppImage.

Updates are delivered in-app and verified against the project's
minisign key before they install (on macOS the updater refreshes the
app, not the hand-installed daemon).