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[1/13][Adjoint Module] Fix MaterialGrid design-variable attribution in the adjoint gradient - #3297

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smartalecH wants to merge 6 commits into

fix/adjoint-adjacent-material-grids

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[1/13][Adjoint Module] Fix MaterialGrid design-variable attribution in the adjoint gradient#3297
smartalecH wants to merge 6 commits into
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fix/adjoint-adjacent-material-grids

Commits on Oct 9, 2026
- Give each design region only its own material grid's gradient
  
  smartalecH
  authored and
  Alec Hammond
  committed
  9368ce0
- Differentiate shared design variables through every copy of their grid
  
  smartalecH
  authored and
  Alec Hammond
  committed
  a24343a
- cosmetic changes to comments
  
  smartalecH
  authored and
  Alec Hammond
  committed
  5c2e271
- Fix unequal-size overlapping MaterialGrid gradients
  
  smartalecH
  authored and
  Alec Hammond
  committed
  d145435
- Relax unequal-grid gradient tolerance in single precision
  
  smartalecH
  authored and
  Alec Hammond
  committed
  47dc1a1
- Clarify why U_MIN/U_PROD see a single grid copy in the adjoint
  
  Alec Hammond
  and
  claude
  committed
  23a479d