Trashman...you go off on the improbability of things that don't fit your taste (many of which are, admittedly, very improbably), then turn around and present an EM shield against solar radiation as evidence for an energy shield protecting ships from massive directed energy and kinetic impacts.
That's a bit of a double standard.
I have heard that plasma fields might be used for stuff like this, but it's not going to work the way it looks in Freespace.
The shield doesn't have to be a forcefield. All it needs is huge capacitors and a way of discharging the energy to counter incoming projectiles just before they hit. Nothing impossible in the 24'th century, especially when using alien tech.
That's a point defense system, not a shield.