The Gitea runner on Windows doesn't have bash available for
composite actions. Replace dtolnay/rust-toolchain and
actions/setup-node with direct PowerShell commands.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Triggers on pushes to app/ directory. Builds Tauri app on both
platforms with Rust caching, uploads .AppImage/.deb/.rpm for Linux
and .msi/.exe for Windows as artifacts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
