Fix wrap path heuristic for out-of-board cells - #1
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Modulo the axis delta before torus distance so A* wrap cost stays non-negative.
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Summary
GridPathPlannerwrap distance usedmin(|d|, size-|d|)without reducingdmodulo the board, so A* heuristic could go negative when cells were outside[0, size).[0, size/2].GridPathPlanner.test.js.Test plan
node --experimental-default-type=module --test gameblocks/modules/behavior/GridPathPlanner.test.jsIndependent verify: fail-then-pass h(0→15) -5 → 5 on SHA
e181193a873bc55c8092ba2bac24c2656cdd412a.