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Gorgious56 adf2603c0e Add partial-state rollback on execute_ifc_operator

When an operator mutated IFC then raised mid-execute the user was left
staring at a raw traceback with the IFC graph captured by the active
transaction but the Blender side stale. Blender does not push an undo
step for a raised operator (the same gap that the CANCELLED-modal arm
patches via bpy.ops.ed.undo_push), so the WARNING the framework can
emit is only honest if it pushes that undo step too. The framework
now detects partial state via ifc_file.transaction.operations,
pushes a Recover undo step, then reports a WARNING naming Ctrl+Z so
the recovery path is discoverable. The bespoke try/except wrapper in
UnjoinWallPathConnection becomes redundant and is retired in the
same change.

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2026-06-11 18:46:19 +02:00