[2023] Some questions about early 0.9 trading

Before we get resonance and factions, i had a few questions on gifting:

1) will an item that drops in the same map as two players be permanently tradeable back and forth an infinite number of times?

1a) if so, will there be indication on the item like D3 names

2) if an item drops, can you craft on it, trade it to the other player, they craft on it and trade it back (ie does crafting limit gifting at all)

2a) if yes, what about rune of ascendence? is it counted as the same item still

3) will there be a way to link items to your friends like poe and d3?