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* Add roof surface placement support for items Items (e.g. solar panels) can now be placed on sloped roof surfaces. The placement system computes euler rotation from the roof surface normal so items sit flush on the slope instead of going inside. - Add roofStrategy to placement-strategies with enter/move/click/leave - Wire roof:enter/move/click/leave events in the placement coordinator - Add calculateRoofRotation in placement-math using surface normals - Support full 3D cursor rotation for sloped surfaces - Items on roofs are parented to the level with world-space rotation Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fixed conflict * fix(editor): defer floorplan annotation collision layout * fix(viewer): suspend outlines during camera movement * fix(editor): keep floorplan zoom off the render hot path * fix(editor): keep floorplan pan off render hot path * fix(editor): keep floorplan rotation off render hot path * fix(editor): keep rotation backdrop white * fix(editor): finalize floorplan navigation safely * fix(editor): keep navigation interaction state current * fix(editor): stop floorplan animation before pan --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>