Task #28 prep. The orchestrator side has its own end-to-end tests
under `crates/op-orchestrator/`, but the host's actor seam
(worker → mpsc → UI thread → ack → mirror update + Progress → chat
bubble) was only exercised piecewise by the three `RemoteDocSink`
tests. This adds a single end-to-end smoke that drives both
`pump_commands` + `pump_progress` from a fake worker thread against a
real `WidgetHostNative`, then asserts:
- Progress events rendered into the trailing assistant bubble
(`• Planning…` line surfaces verbatim).
- `RunSummary::Ok` rendered as the `Done — K subtask(s) succeeded`
trailer with `streaming = false`.
- `*current` cleared after `Done` so the event loop stops ticking
at 33ms for this turn.
Internal hook: `DesignSession::from_channels` (cfg(test)) wraps
externally-supplied channels so a fake worker can drive the UI
pumps without spinning up `Orchestrator::run` / an `agent::Provider`
/ a live API key. Production path still goes through
`DesignSession::start`.
The full LLM smoke is documented separately in
openpencil-docs/superpowers/notes/2026-05-24-orchestrator-smoke-steps.md
— it needs `OPENPENCIL_ANTHROPIC_API_KEY` and can't live in cargo test.
cargo test -p op-host-desktop 106 passed (was 105). cargo fmt + clippy
--workspace -D warnings clean.
aef03e5541