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The Windows client now listens for relay control events while the TAP frame pump is running and logs peer lifecycle updates as they arrive. Gateway joins get a clear LAN-gateway message, client joins include their virtual MAC, and peer leaves include the relay-provided reason. The non-Windows placeholder path also listens for the same events while waiting for Ctrl-C. That keeps lifecycle diagnostics visible in local relay/client smoke tests even before the Windows TAP path can be exercised on a real machine. Test Plan: - cargo fmt --check - cargo test -p lanparty-client-win - cargo clippy -p lanparty-client-win --all-targets -- -D warnings - cargo test --workspace - cargo clippy --workspace --all-targets -- -D warnings - git diff --check Refs: PLAN.md