5565b216ba
Implements #342. StemDeck stays portable: extract the tarball, run ./StemDeck, and none of this is required. install.sh is there for people who would rather launch from their applications menu. It installs the package it sits in and never downloads anything, so the version and the CPU/NVIDIA variant come from the package itself (backend/static/version.json and the cpu-only marker) and cannot drift from the build being installed. That also removes any need to verify a second download. Design notes, mostly things the reference installer in #342 got wrong: - Install is atomic. The new copy goes to <target>.new and is verified before the old one is moved aside, so a failure partway leaves the working install untouched. Removing the old copy first is what made a failed upgrade in that fork leave the machine with no StemDeck, no launcher and no manifest recording where it had been. - A failed copy cleans up its own staging directory rather than leaving a package-sized partial on disk. - Exec is quoted, so an install path containing a space still launches. - Version comparison is semver-aware. sort -V ranks 0.8.0-alpha.17 above 0.8.0, which would tell every pre-release user they were current the day a stable release shipped. - Reading a missing manifest key yields empty rather than killing the script, which under set -euo pipefail is what a grep|head|cut pipeline does. - Global installs put the launcher in /usr/share/applications and the icon in /usr/share/pixmaps, so other users on the machine can see it. - Installing from inside the destination is refused rather than moving the running script out from under bash. - Non-x86_64 machines get a clear refusal instead of a binary that cannot run. User data is never touched. Stems live in ~/Documents/StemDeck and the runtime, models and logs in $XDG_DATA_HOME/stemdeck, both outside the install directory. Legacy data/ from pre-migration builds is carried across an upgrade, and uninstall refuses to delete it, leaving the folder and saying why. tests/linux/test_install_sh.sh runs the real installer against a synthetic package in a throwaway HOME: 52 checks covering install, upgrade, the failed-upgrade case, uninstall, corrupt manifests, paths with spaces, legacy data, self-install, arch refusal and the semver table. CI runs it on Linux with shellcheck and desktop-file-validate. Closes #361