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ajandClaude Opus 5.5
d1270f5208
Whole-nest snapshots make undo safe without a hand-written inverse per operation: each recorded edit stores one NestSnapshot in the document's history, and Undo/Redo read one back and swap it into the open window. - Document.History is reset with the opened nest; Save and database saves mark the save point instead of clearing it. - EditNestForm.BeginChange opens a scope: nested scopes merge into the outermost, Complete commits one entry, and leaving it incomplete rolls a changed nest back. No-ops are detected by the scope's changed flag, not by comparing bytes (copies are not byte-stable). - RestoreNest shares the per-nest binding with the constructor and keeps the Document, the nest's identity, the plate index, the viewport and the selection. It ends the action, closes Cutting Inspection, side panels and the remnant viewer, rebuilds the PlateManager, reapplies the view's cut-off settings and recolours the drawings, because each of those holds or derives from the old nest's objects. - An edit no scope recorded (Phase 3 sites) is detected by a cheap fingerprint and committed as its own "Change" entry before a scope, Undo or Redo, so it is never silently discarded; DEBUG builds also warn about it on idle. - Edit > Undo/Redo name the next entry. Ctrl+Z/Ctrl+Y/Ctrl+Shift+Z go to focused text editors first, then to an action's own step-back (Sequence by Path), then to the nest. They wait for jobs, fills, background saves and busy actions, but not for a plain selection. - Recorded: delete, drag, arrow nudges (coalesced), rotate, align, push, expand spacing, add part (drop and clone), cut, add and remove plate. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>