- Add "Build fcitx5 plugin" step to release-tauri.yml: compiles
the C++ plugin via cmake, copies .so + .conf to
src-tauri/linux-fcitx5-plugin/ for the Tauri bundler.
- Override tauri build --config to include deb.files / rpm.files
that place the plugin at /usr/lib/fcitx5/ so it's auto-detected
after install.
- Add fcitx5, fcitx5-module-dbus as deb/rpm dependencies.
- Local builds unaffected (config is CI-only via --config flag).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>