Remove dead alsa dependency from src-tauri/Cargo.toml (code lives in qbz-audio since V2 migration) and bump qbz-audio to alsa 0.10. Eliminates duplicate alsa versions in Cargo.lock. Breaking changes in 0.10 (Format/ChmapPosition reorder) do not affect QBZ — we use catch-all matches and never rely on PartialOrd. Closes #260 cc