Token-protected Bun.serve server (bun run align [--host] [--port]
[--url-host] [--root]) with the layout-A page: recording and warped-MIDI
lanes on one zoomable timeline, draggable anchors (recording end / MIDI
end), stretch tempo labels with warnings, fit-flagged windows, Web Audio
playback with mix choice, auto-align, save, reset, undo. API per the task
brief; transcode/peaks cache under reference/<id>/. Adds bun run align
auto <id>, writeSmf (tests), encodeWav, recordingOnsets/fitFromOnsets,
fitSummary and stretch tempo helpers.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
