* Fire a right-button mousedown then mousemove (drag in progress, no release).

* Installs mock net event/redraw/view plumbing needed by toTileBlobs. * Returns { eventHandlers, allHandlers } -- allHandlers preserves every * regi

* Black-box tests for RectangularSelection. * * Behaviors covered: * 1. attach() registers documented listeners; detach() removes them and trigge

* Creates a Pinia instance with topology items placed to produce a specific * bounding box. The real getter adds margin=100 per side (default), so:

* Wire `network.getPositions` to return positions from an {id: {x,y}} map.

* Sets up a saved host whose hostname has been mutated through the public * update workflow. Returns the auto-assigned (pre-mutation) hostname so t