Gear variety pass & inventory QoL

Most classes had no real weapon choices. Flayer weapons were all slight variations on raw STR. Drifter's two rare daggers were nearly identical. Signalborn had one staff and one catalyst with no tradeoffs.

Added six new weapons that create actual decisions. Bulwark gets a tank sword. Drifter gets a dodge dagger. Flayer gets a crit maul. Signalborn gets a glass cannon staff and an aggressive catalyst. Every class now has at least two viable build paths per weapon slot.

New legendary: Bloodtide Axe drops from Dregthar in the Miasma Flats. Flayer-specific lifesteal weapon — 8% sustain that doubles below 40% HP, at the cost of reduced constitution. The tradeoff is real.

Weapons now show their damage type in the slot tag — "1H Physical", "2H Magic", etc. You can tell at a glance whether a weapon scales off INT or STR without opening the detail modal.