Boss fragments now have identity

Every boss fragment now has its own name, icon, and colour. Rootmother Fragment glows mint green with a mushroom icon. Pyrax Fragment burns orange with a flame. Vekthra's is frost blue and crystalline. Leviathan's is deep indigo. Each one looks like it came from the thing that dropped it.

The fragment tracker on your character sheet reflects this — when you're making progress toward a boss, their fragment's colour fills the progress bar. When you have enough to summon, the whole row lights up in that boss's colour instead of a generic gold. You can see at a glance which fights you're close to and which you're still working toward.