- Resize handles only render when the plan is selected (click to select,
click outside to deselect); previously always shown when unlocked.
- Double-clicking an unlocked plan opens the canvas edit modal (via a
floorMapEditNonce signal the Sidebar watches).
- Floor plan always sits at the bottom of the canvas (z-index -1), behind
nodes and edges, locked or not.
- Remount the edit modal on every open (key bump) so it re-seeds from the
current floor plan; fixes Save clobbering a canvas-side resize/move with
stale modal dimensions.
- Drop the no-op history snapshot on floor-plan edits (floorMap isn't part
of undo history).
Pouzor