c0d4fdf7b4
The Windows client frame pump needs one task reading TAP frames while another writes relay frames back to the adapter. The TAP crate already owns the raw Windows file handle; this change makes the handle's thread-safety boundary explicit with `Send` and `Sync` impls and documents the Windows handle assumption next to the unsafe code. This does not add the pump yet. It only prepares the adapter type for the separate read/write loops that will wire TAP I/O to the relay session. Test Plan: - cargo fmt --check - cargo test --workspace - cargo clippy --workspace --all-targets -- -D warnings - CC_x86_64_pc_windows_msvc=clang-cl AR_x86_64_pc_windows_msvc=llvm-lib \ CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_LINKER=lld-link cargo clippy \ -p lanparty-client-tap --target x86_64-pc-windows-msvc -- -D warnings - git diff --check Refs: PLAN.md