v0.9.0

RELEASE_NOTES.md

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+# Citizen Launcher 0.9.0 — distro-neutral preview
+
+This release turns Omarchy Citizen into an optional integration instead of the product core.
+
+## New
+
+- standalone distro-neutral `citizen-launcher` Go binary
+- embedded polished local GUI (`citizen-launcher gui`)
+- Debian/Ubuntu `.deb` packaging
+- generic Linux amd64 tarball
+- Fedora RPM spec template
+- distro detection via `/etc/os-release`
+- package-manager detection for apt/dnf/pacman/zypper/apk diagnostics
+- XDG-native config/data/state/cache paths with legacy Omarchy-Citizen migration
+- generic systemd user maintenance timer, with launch-time maintenance fallback on non-systemd desktops
+- support bundles generated entirely in Go
+- Omarchy moved to `integrations/omarchy/`
+- system tools preferred; LUG AppImage runtime is only a lazy portability fallback when cabextract/curl/unzip are unavailable
+
+## Validation performed
+
+- `go test ./...`
+- `go vet ./...`
+- static Linux amd64 Go build
+- shell syntax verification
+- embedded GUI HTTP/API smoke test
+- generic user installer smoke test in an isolated HOME
+- Omarchy updater integration test
+- Debian package build and metadata inspection
+
+## Still needs real-hardware testing
+
+- clean Debian/Ubuntu desktop → RSI login/install → Star Citizen launch
+- Fedora/openSUSE hardware testing
+- AMD/NVIDIA/Intel Vulkan permutations
+- production standalone self-update release channel once an official repository/release URL is chosen