Method ack

src/proxy/mailbox/store.js:440–452

(messageIds)

  // --- Public API: status updates ---

  ack(messageIds) {
    const ids = Array.isArray(messageIds) ? messageIds : [messageIds];
    let count = 0;
    for (const id of ids) {
      const msg = this._messages.get(id);
      if (msg && msg.direction === 'inbound') {
        this._appendUpdate(id, { status: 'delivered' });
        this._evictFromIndex(id);
        count++;
      }
    }
    return count;
  }

  updateStatus(id, status, { error, syncedAt } = {}) {
    const TERMINAL = new Set(['synced', 'delivered', 'failed', 'rejected']);