feat(shaders_lab): drag-and-drop to reorder DAG steps

ImGui native BeginDragDropSource/Target over each CollapsingHeader.
Drag source adjusted if ahead of target to keep final position correct.
Move Up/Down buttons kept for keyboard/touchpad fallback.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-04-24 21:21:58 +02:00
parent e115c2e3fd
commit bdce314199
2 changed files with 25 additions and 0 deletions
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