I think that the discussion here, and I have enjoyed reading everyone's viewpoints on the subject, is definitely bringing up a lot of good questions but it going round in circles in some respects. Especially around the point of Machine vs Magic, which to me seems to be arguing over semantics somewhat.
Tolkien certainly thinks poorly of Machines if taken to mean mechanical and/or industrial apparatuses. Anything more complicated that a waterwheel for instance. But I do agree with some of the previous posts that he also designed magic to be much more in the roots of the earth then it is in basically any other fantasy world. Magic does not exist in its own right in LOTR the way it does in other fantasy worlds because Magic in LOTR is derived through the Powers of the world, either
Vala or
Maia. Those learned in or instructed by those Powers can channel them to achieve certain ends or to imbue
objects with certain characteristics. In this way magic does seem to be a form of
technology in that it is an extension of living beings but not necessarily originating from them. The
elves, the Caliquendi specifically, have such prowess with Magic due to their close association with the
Ainur (
Aule most of all) and having gone to
the blessed realm, and they are able to create what we would consider
magical objects by using that learning.
The
Noldor especially had this knowledge because they had that close connection with Aule, being the smith and tinkerer of the Ainur. From this perspective,
the Mirror could have intended properties/functions that are imbued into it and operate on its own but would also be made more effective or have its functions enhanced/directed by the user. Its like any device that it is made more capable by the prowess or skill of its user.
Whether you say Art or Machine (which I do believe is semantics to some degree), the Mirror seems to have a range of capabities that become evidently enhanced by
Galadriel. Similarly, both a computer (Machine) and a paintbrush and canvas (Art) have inherent functions that can be enhanced or unlocked by the knowledge or skill of the user. The Mirror certainly seems connected to Galadriel, that much is clear, but that doesn't necessarily mean it doesn't have its own latent capabilities derived from its making.
I think it must be a bit of both. The Mirror is a magical object, or technological object (again semantics), and it also has a connection to Galadriel. Thinking of the discussion lots of previous folks have had about the water being significant, I think it is likely both because of
the ring and also due to all the waters of the world being within the realm of the Vala
Ulmo. Any abilities the Mirror or Galadriel have are via channeling or communing with the power of Ulmo.