Function _onExtractState

static/mobile/app.js:609–628

(jobId, s)

}

function _onExtractState(jobId, s) {
  if (!state.extractJob || state.extractJob.id !== jobId) return false;
  state.extractJob.status = s.status;
  state.extractJob.progress = s.progress || 0;
  state.extractJob.stage = s.stage || s.status;
  if (state.tab === "extract") render();
  if (s.status === "done" || s.status === "error" || s.status === "cancelled") {
    if (s.status === "done") { toast("Stems ready!"); loadLibrary(); }
    else if (s.status === "error") toast("Extraction failed.");
    const finishedId = jobId;
    setTimeout(() => {
      if (state.extractJob && state.extractJob.id === finishedId) {
        state.extractJob = null;
        if (state.tab === "extract") render();
      }
    }, 4000);
    return true; // terminal
  }
  return false;
}

// SSE with a REST-poll fallback (mirrors the desktop's resilience, simplified).
function followExtraction(jobId) {