Changelog

1.1.0

Rewrote the auto-placer. The old solver was a naive backtracker with no pruning that ran one placement per frame — on simple repeated shapes (e.g. 5 identical Y-shaped upgrades) it would leave 1-cell gaps and endlessly rotate the smaller pieces, and on tight sets it could appear frozen for minutes. It is now a bitmask packer with area, connected-region, most-constrained-piece, and exact-cover pruning. Typical layouts solve in milliseconds, and genuinely impossible sets are reported quickly instead of hanging.
Handheld Pocket Universe now moves. HPU is positioned by the solver alongside the other upgrades instead of being forced into the first free slot, so it no longer defaults to the top-left corner.
Fixed a false "no solution" case. Region pruning could reject layouts that actually fit when they left a small empty pocket; the packer now only rejects sets that are truly impossible.
Boundary Incursion, Multiversal Thievery, Edge Fault, and Handheld Pocket Universe support is otherwise unchanged.

Fork of Sparroh's GridSolverPlus with major enhancements
Handheld Pocket Universe support: Inflates upgrade cell counts per rarity (Standard=1, Rare=2, Epic=3, Exotic=4)
Multiversal Thievery support: Grid-expander, placed before all other expanders (adds up to 3 columns)
Edge Fault support: Grid-expander, placed alongside Boundary Incursion (adds column/row)
Four-tier placement priority: Major expanders (MT) → Minor expanders (BI, EF) → Cell modifiers (HPU) → Everything else
Unequip All button: Clear all upgrades from the current gear with one click
Gear-change detection: Auto-clears selection when switching gear inside an open window
Selection preserved on failure: Failed solves keep your selection so you can deselect one or two and retry
Snapshot and restore: Failed solves restore your previous upgrade layout exactly
Robust reflection: Base-type walking for private field access, cross-gear ownership validation