1st up. Did the dealer who said it need work raise and check out the front end at all? Check it out? Cant really see how they could say that if they hadn't checked it out.
I would apply the parking brake, then raise the front off the ground say 6" or so. Get a 4 ft bar or bit of timber and slide it in under the wheel a bit. Then lift the bar up and down a little, raising and lowering the wheel. Dont overdoo the lift, just enough to lift the wheel and then a smidgen more. Have a look at each joint individually while the lifting and releasing is going on. Any movement should be obvious in the suspension joints if you have a close look while levering it up and down. Maybe have someone else work the bar and 1 looking at all the joints. Then grip the wheel on the sides with your hands.and move back and forth. Like turning lock to lock turns. Back and forth. Movement in the joints? Lastly I would pull the wheel forwards and back, again and again. Again looking for any joint slop , clunk or movement. If there is no movement at all anywhere its fine and that dealer is is suspect. Your bike with irregular tyre wear does indeed sound like it would benefit from an ligament. Me I would consider a new set to tyres then the alignment.
Oh and welcome aboard.
Gerald Mac.
