Introduce stdio/websocket transport abstraction for app-server, including routed outbound handling and websocket parity coverage.
Also extends protocol/config plumbing for initialize capabilities, web search external access control, and ChatGPT auth-token login support.
* emit json snapshots once then deltas with ordering metadata
* dedupe browser snapshots and update history pruning
* refresh mac temp path tests and TUI snapshots for new ordering
build-fast.sh
cargo nextest run --no-fail-fast --manifest-path code-rs/Cargo.toml