Hovering a unit now makes `UnitIsUnit("mouseover", "target")` (or any other token naming the same unit) answer 1, as in 1.12.1, where `UnitIsUnit` (`0x516070`) resolves both tokens through `0x515970` and compares their guids, and `mouseover` reads the hovered unit's guid (`0xb4e2c8`/`0xb4e2cc`, written by `0x492890`). The `mouseover` unit state was pushed with guid 0, so every such comparison answered nil.
`ui_unit::snapshot` now takes the unit's guid and sets it, so every unit state built from a snapshot carries it; the callers that set it by hand afterwards no longer do.
Fixes#496
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>