Addresses the first codex review of the arc + pen-handle features.
BLOCKs:
- Rotation: the arc + pen-handle overlays and the host hit-tests now
account for node rotation. The overlay paint wraps in save/rotate
like the selection overlay; the hit-tests + drag math un-rotate the
cursor into the node's local frame via `rotate_point`.
- Arc ellipse hit-test: a pie / arc / donut now hit-tests against the
actual sector — the missing wedge + the donut hole are no longer
selectable (was always the full oval).
- Arc no-op undo: `ArcHandleDragState` gains `start_doc`; the move
handler gates `moved` on real cursor travel so a press-release
pushes no undo entry.
CONCERNs:
- Path bounds: the bezier handle-aware bounds algorithm moved into a
shared `op_editor_core::path_bounds`; `refit_path_bounds` uses it
(and is now called after handle / point-type edits) so the loader's
absolutize scale stays 1.0 — a handle no longer rescales the path.
- `cmd_set_ellipse_arc` now honours the locked/hidden editability
guard like the other geometry mutators.
- A full-ring donut strokes its two concentric ovals instead of the
polygon, so the radial seam is not drawn.
op-editor-core 235 / op-editor-ui 148 / op-pen-loader 21 /
op-host-native 64 / op-host-desktop 21 tests green.
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